UEHARA Hiroki

J-GLOBAL         Last updated: Nov 13, 2019 at 23:20
 
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Name
UEHARA Hiroki
Affiliation
Gunma University
Job title
Professor
Degree
(BLANK)(Science University of Tokyo)

Research Areas

 
 

Academic & Professional Experience

 
1995
 - 
1996
Post-Doctral Fellow
 
 
   
 
in Polymer Science and Engineering
 
 
   
 
Department, University of Massachusetts, USA
 

Education

 
 
 - 
1997
Graduate School, Division of Natural Science, Science University of Tokyo
 
 
 - 
1992
Faculty of Science, Science University of Tokyo
 

Awards & Honors

 
Jun 2014
Highly Transparent and Robust Poly(tetrafluoroethylene) Membrane Prepared by Biaxial Melt-Drawing, Front cover article, Macromol. Mater. Eng.
 
May 2012
Nanowrinkled and Nanorporous Polyethylene Membrane via Entanglement Arrangement Control, Front cover article, Adv. Funct. Mater.
 
Apr 2007
Effects of Knot Characteristics on Tensile Breaking for Polymeric Monofilament, Selected in Top 10 article downloads in April 2007, Institute of Physics, England
 
Jul 2006
Nano-Porous Polyethylene Film Prepared from Bicontinuous Crystalline/Amorphous Structure of Block Copolymer Precursor, The most-accessed articles from the second quarter of 2006 from Macromolecules, Macromolecules
 
Jun 2006
Phase Development Mechanism during Drawing from Highly Entangled Polyethylene Melts, Front cover article, Macromolecular Rapid Communications
 

Published Papers

 
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY   74(9) 1167-1176   Sep 2019   [Refereed]
EUROPEAN HEART JOURNAL   40(33) 2801-2809   Sep 2019   [Refereed]
Igisu Motoko, Komiya Tsuyoshi, Awramik Stanley M., Ikemoto Yuka, Geng Yechuan, Uehara Hiroki, Takai Ken
ISLAND ARC   28(5)    Sep 2019   [Refereed]
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY   73(4) 387-396   Feb 2019   [Refereed]
NEW ENGLAND JOURNAL OF MEDICINE   379(22) 2097-2107   Nov 2018   [Refereed]
Kuwahara Yasutaka, Fujibayashi Akihiro, Uehara Hiroki, Mori Kohsuke, Yamashita Hiromi
CATALYSIS SCIENCE & TECHNOLOGY   8(7) 1905-1914   Apr 2018   [Refereed]
Combination of DSC and in-situ XRD for Analysis of Melting Behavior of Polymeric Materials
Uehara Hiroki, Masuda Ayako, Yamanobe Takeshi
BUNSEKI KAGAKU   67(3) 145-151   Mar 2018   [Refereed]
Igisu Motoko, Komiya Tsuyoshi, Ikemoto Yuka, Geng Yechuan, Uehara Hiroki
GEOCHEMICAL JOURNAL   51(6) 589-594   2017   [Refereed]
Stereo-Complex Crystallization of Poly (Lactic Acid) within Nano-Confined Space
Uehara Hiroki
SEN-I GAKKAISHI   72(10) P464   Oct 2016   [Refereed]
Oda Takamasa, Okamura Takayuki, Yamada Jutaro, Miyagi Naoto, Uehara Hiroki, Nao Tomoko, Tateishi Hiroki, Maeda Takao, Nakamura Takeshi, Shiraishi Kohzoh, Nakashima Tadamitsu, Nishimura Shigehiko, Miura Toshiro, Matsuzaki Masunori, Yano Masafumi
HEART AND VESSELS   31(4) 449-456   Apr 2016   [Refereed]
Aoyagi Tsuyoshi, Ishii Shigeru, Uehara Hiroki
SAE INTERNATIONAL JOURNAL OF ENGINES   8(4) 1503-1507   Sep 2015   [Refereed]
Nakanowatari Takuya, Nakamura Tomohiro, Uchimoto Keisuke, Uehara Hiroki, Mitsudera Humio, Ohshima Kay I., Hasumi Hiroyasu, Wakatsuchi Masaaki
JOURNAL OF CLIMATE   28(2) 714-736   Jan 2015   [Refereed]
Uehara Hiroki, Kruts Andrey A., Mitsudera Humio, Nakamura Tomohiro, Volkov Yuri N., Wakatsuchi Masaaki
PROGRESS IN OCEANOGRAPHY   126 80-97   Aug 2014   [Refereed]
Uehara Hiroki, Kruts Andrey A., Volkov Yuriy N., Nakamura Tomohiro, Ono Tsuneo, Mitsudera Humio
JOURNAL OF OCEANOGRAPHY   68(6) 869-886   Dec 2012   [Refereed]
Development and Application of in situ Pulse NMR Measurement System for Drawing of Polymeric Materials
Yamanobe Takeshi, Kakiage Masaki, Miyazaki Noriaki, Morita Sho, Uehara Hiroki
KOBUNSHI RONBUNSHU   69(5) 235-241   May 2012   [Refereed]
Uehara Hiroki, Kizu Shoichi, Hanawa Kimio, Yoshikawa Yasushi, Roemmich Dean
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS   113(C2)    Feb 2008   [Refereed]
Takeno Hiroyuki, Uehara Hiroki, Murakami Shozo, Takenaka Mikihito, Kim Myung Im, Nagasawa Naotsugu, Sasaki Sono
JOURNAL OF APPLIED CRYSTALLOGRAPHY   40 S656-S661   Apr 2007   [Refereed]
Okishige Kaoru, Uehara Hiroki, Miyagi Naoto, Nakamura Kentarou, Azegami Kouji, Wakimoto Hirofumi, Ohba Kageyuki, Hirao Kenzo, Shimabukuro Mitsuo, Isobe Mistuaki
CIRCULATION JOURNAL   72(1) 76-80   Jan 2008   [Refereed]
Clinical study to investigate the accuracy of the "post-pacing interval" method to detect the optimal site for catheter ablation in patients with WPW syndrome as a typical model of macro-reentry
Azegami Kouji, Okishige Kaoru, Wakimoto Hirofumi, Ohba Kageyuki, Zukeran Takako, Uehara Hiroki, Kurabayashi Manabu, Nakamura Kentarou, Konishi Masanori, Hirao Kenzou, Isobe Mitsuaki, Wang Paul J.
CIRCULATION   114(18) 602   Oct 2006   [Refereed]
PMSE 267-Study on interfacial properties of high performance carbon fiber/PPESK composites
Morioka Takashi, Kakiage Masaki, Yamanobe Takeshi, Komoto Tadashi, Murakami Syozo, Uehara Hiroki
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   232 192   Sep 2006   [Refereed]
PMSE 244-Polysaccharide nano gel encapsulating DNA/polycation complexes for gene delivery
Kakiage Masaki, Yamanobe Takeshi, Komoto Tadashi, Murakami Syozo, Uehara Hiroki
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   232 183   Sep 2006   [Refereed]
PMSE 263-Application of commercial aliphatic hyperbranched polyesters as processing additives of PVC
Suwa Jun-ichi, Kakiage Masaki, Yamanobe Takeshi, Komoto Tadashi, Uehara Hiroki
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   232 182   Sep 2006   [Refereed]
Nano-periodic arrangement of structural phases of polyethylene-black-polystyrene copolymer as induced by orientation tehniques
Uehara Hiroki, Yoshida Tomoyuki, Kakiage Masaki, Yamanobe Takeshi, Komoto Tadashi
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   232 205   Sep 2006   [Refereed]

Misc

 
Hiroki Uehara
Polymer Journal   51 319-325   Mar 2019
© 2018, The Society of Polymer Science, Japan. Abstract: Molecular entanglements have been thought to restrict a desirable chain orientation during drawing. Therefore, a reduction in chain entanglements has been a focus for manufacturing high-perf...
Takeshi Yamanobe, Hayata Takeda, Yoshihisa Takada, Daisuke Nagai, Masaru Yoneyama, Hiroki Uehara, Keiko Takahashi
Journal of Inclusion Phenomena and Macrocyclic Chemistry   93 117-126   Feb 2019
© 2018, Springer Nature B.V. The addition effects of cyclodextrin (CD) and methylated cyclodextrin (Me-CD) on the structure and mechanical properties of PLLA were investigated. Inclusion complexes (IC) of α, β and γ-CD and PLLA were prepared. The...
撹上将規, 関谷美穂, 東宮大貴, 山延健, 上原宏樹
高分子論文集   76(2) 150‐156(J‐STAGE)-156   Jan 2019
©2019, The Society of Polymer Science, Japan An isothermally crystallized polyethylene/polystyrene diblock copolymer (PE-b-PS) film exhibited a characteristic melting behavior. In this study, the melting behavior of PE-b-PS isothermally crystalliz...
Shin Ichiro Kato, Haruka Kano, Ken Ichi Irisawa, Naoki Yoshikawa, Ryuichiro Yamamoto, Chitoshi Kitamura, Daiki Nara, Takeshi Yamanobe, Hiroki Uehara, Yosuke Nakamura
Organic Letters   20 7530-7534   Dec 2018
Copyright © 2018 American Chemical Society. A series of 2,4,5,7,9,10-hexaethynylpyrenes was synthesized using 2,7,9,10-tetrabromopyrene-4,5-dione as the key intermediate. The effects of the position and number of the ethynyl groups on the physicoc...
上原宏樹
天田財団助成研究成果報告書   31(0) 103‐108-108   Dec 2018
桒原 涼子, 富田 遼太郎, 中島 一憲, 武田 友孝, 上原 宏樹, 山延 健
スポーツ歯学   21(2) 31-36   Feb 2018
上原 宏樹
デサントスポーツ科学   39 36-42   May 2018
Hiroki Uehara, Takeshi Yamanobe, Eiichi Akiyama
International Polymer Science and Technology   45 129-136   Jan 2018
© 2018, Smithers Rapra. Typical silicones, including poly(dimethyl siloxane) (PDMS), are amorphous, but poly(tetramethyl-p-silphenylene-siloxane) (PTMPS) containing phenyl rings in the main chain is crystalline. A combination of in-situ X-ray and ...
Shin Ichiro Kato, Satoshi Jin, Terutaka Kimura, Naoki Yoshikawa, Daiki Nara, Kenji Imamura, Yoshihito Shiota, Kazunari Yoshizawa, Ryo Katoono, Takeshi Yamanobe, Hiroki Uehara, Yosuke Nakamura
Organic and Biomolecular Chemistry   16 3584-3595   Jan 2018
© 2018 The Royal Society of Chemistry. We report the synthesis, photophysical properties, redox characteristics, and self-assembly behavior of disk-shaped trithiazolyl-1,3,5-triazines that bear decyloxybenzene moieties. These compounds were synthe...
Hiroki Uehara, Ayako Masuda, Takeshi Yamanobe
Bunseki Kagaku   67(3) 145-151   Jan 2018
© 2018 The Japan Society for Analytical Chemistry. A novel methodology for comparing in-situ X-ray measurements during heating and thermal analyses was developed for polymeric materials, including polypropylene and poly(lactic acid). The different...
Hiroki Uehara
Journal of Fiber Science and Technology   74(1) P-44-P-48   Jan 2018
IWABUCHI Ryunosuke, NAGAI Daisuke, YONEYAMA Masaru, UEHARA Hiroki, YAMANOBE Takeshi, MANAKA Masakazu
KOBUNSHI RONBUNSHU      2018
The effects of kneading time and composition of dynamic thermoplastic elastomer (TPV) composed of polypropylene (PP) and EPDM on the physical properties and structure of TPV are investigated. As a result of the tensile test, the breaking stress an...
桒原 涼子, 中島 一憲, 武田 友孝, 上原 宏樹, 山延 健
スポーツ歯学   20(2) 19-26   Feb 2017
Nobutaka Takahashi, Shin Ichiro Kato, Minoru Yamaji, Masahiko Ueno, Ryunosuke Iwabuchi, Yui Shimizu, Masashi Nitani, Yutaka Ie, Yoshio Aso, Takeshi Yamanobe, Hiroki Uehara, Yosuke Nakamura
Journal of Organic Chemistry   82(17) 8882-8896   Sep 2017
© 2017 American Chemical Society. Tetraalkoxyphenanthrene-fused hexadecadehydro[20]- and tetracosadehydro[30]annulenes possessing octatetrayne linkages were synthesized and their properties together with those of phenanthrene-fused octadehydro[12]...
UEHARA Hiroki, YAMANOBE Takeshi, AKIYAMA Eiichi
NIPPON GOMU KYOKAISHI   90(7) 338-345   2017
<p>Typical silicones, including poly(dimethyl siloxane)(PDMS), are amorphous, but poly(tetramethyl-p-silphenylene-siloxane)(PTMPS) containing phenyl rings in the main chain is crystalline. A combination of in situ X-ray and NMR measu...
MANAKA Masakazu, IWABUCHI Ryunosuke, KASHIHARA Yuriko, KOGUSURI Jiro, UEHARA Hiroki, YAMANOBE Takeshi
NIPPON GOMU KYOKAISHI   90(4) 183-189   2017
<p>Thermoplastic elastomer (TPE) produced by dynamic vulcanization which is one of the reactive processing is generally called thermoplastic vulcanization (TPV). <br/>It is considered that, in the mixing process of TPV, the crosslink reaction and ...
成田 千尋, 清水 由惟, 上原 宏樹, 山延 健, 大西 拓也, 若林 保武, 稲富 敬, 阿部 成彦, 増永 啓康
東ソー研究・技術報告 = Tosoh research & technology review   61(98) 57-65   2017
Shin Ichiro Kato, Keitaro Watanabe, Misaki Tamura, Masahiko Ueno, Masashi Nitani, Yutaka Ie, Yoshio Aso, Takeshi Yamanobe, Hiroki Uehara, Yosuke Nakamura
Journal of Organic Chemistry   82(6) 3132-3143   Mar 2017
© 2017 American Chemical Society. π-Extended thiadiazoloquinoxaline (TQ) derivatives 1a,b-3a,b, in which a tetraalkoxyphenanthrene moiety is annulated with the TQ core and benzene rings are incorporated via the ethynylene spacer, were synthesized....
Ryoko Kuwahara, Ryotaro Tomita, Natsumi Ogawa, Kazunori Nakajima, Tomotaka Takeda, Hiroki Uehara, Takeshi Yamanobe
Scientific Reports   7 44672   Mar 2017
© The Author(s) 2017. Mouthguards (MGs) made from poly(ethylene-co-vinyl acetate) (EVA) are widely used in contact sports to prevent injuries such as breaking teeth and lip lacerations and to reduce brain concussion. However, the changes in morpho...
Hiroki Uehara
Journal of Fiber Science and Technology   72(10) 464-464-P-464   Jan 2016
Cheol Min Yun, Eiichi Akiyama, Takeshi Yamanobe, Hiroki Uehara, Yu Nagase
Polymer   103 214-223   Oct 2016
© 2016 Elsevier Ltd Polydimethylsiloxane (PDMS)-graft copolyimides were synthesized by polycondensation of 3,5-bis(4-aminophenoxy)benzyloxypropyl-terminated PDMS macromonomer with 4,4’-hexafluoroisopropylidene diphthalic anhydride (6FDA) followed ...
Takeshi Yamanobe, Hiroki Uehara
Polymer Morphology: Principles, Characterization, and Processing   131-150   Apr 2016
© 2016 John Wiley & Sons, Inc. This chapter introduces the morphology/property relationship, the dynamics of morphological transition, the kinetics of crystallization, and so on, analyzed by the combination of nuclear magnetic resonance (NMR) an...
Hiroki Uehara, Mina Ishizuka, Hidekazu Tanaka, Makiko Kano, Takeshi Yamanobe
RSC Advances   6(17) 13971-13980   Jan 2016
© 2016 The Royal Society of Chemistry. Stereocomplex crystallization of poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) was performed by flowing their blended solution through nano-channels of porous membranes. The spacing restriction wi...
Satomi Kato, Hidekazu Tanaka, Takeshi Yamanobe, Hiroki Uehara
Journal of Physical Chemistry B   119(15) 5062-5070   Apr 2015
© 2015 American Chemical Society. Ultrahigh molecular weight polyethylene (UHMW-PE) films having different molecular weights (MWs) were melt-drawn at 150°C. The stress-strain curve for higher-MW film exhibits higher stress on the characteristic pl...
Hiroki Uehara, Takuya Tamura, Hideyuki Yamashita, Takeshi Yamanobe, Hiroyasu Masunaga
Journal of Physical Chemistry B   119(52) 15909-15918   Dec 2015
© 2015 American Chemical Society. Ultrahigh molecular weight polyethylene (UHMW-PE) membranes were prepared using biaxial melt-drawing and subsequent melt-shrinking. Electron microscopy observations indicate that the former membrane has more exten...
Hiroki Uehara, Yasunori Ono, Masaki Kakiage, Takumi Sakamura, Hiroyasu Masunaga, Yasumasa Yukawa, Yoshiaki Higuchi, Hiroki Kamiya, Takeshi Yamanobe
Journal of Physical Chemistry B   119(11) 4284-4293   Mar 2015
© 2015 American Chemical Society. The property development of the ethylene-tetrafluoroethylene copolymer (ETFE) membrane induced by simultaneous biaxial drawing was investigated. Commonly, tensile strength can be increased by drawing; conversely, ...
D. Nagai, T. Kuribayashi, H. Tanaka, H. Morinaga, H. Uehara, T. Yamanobe
RSC Advances   5(38) 30133-30139   Jan 2015
© 2015 The Royal Society of Chemistry. We developed a facile, selective, high recovery system for precious metals based on complexation between melamine and cyanuric acid (denoted as MC) through hydrogen bonding. The addition of melamine to an aqu...
ISOGAI Yukiko, MORITA Ryosuke, UEHARA Hiroki, YAMANOBE Takeshi, AKIYAMA Eiichi
KOBUNSHI RONBUNSHU   72(3) 110-117   2015
Crystalline silicone, poly(tetramethyl-p-silphenylenesiloxane), (PTMPS), has excellent tensile strength, but lacks in flexibility. Therefore, it is blended with conventional flexible silicone elastomers to increase both, strength and flexib...
UEHARA Hiroki
Hosokawa Powder Technology Foundation ANNUAL REPORT   23(0) 57-64   2015
<p>Stereo-complex crystallization of poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) was performed by flowing their blend solution through nano-channels of porous membranes. The spacing restriction within the nano-channels induces the co...
Toshiyuki Suzuki, Ayaka Ei, Yoshihisa Takada, Hiroki Uehara, Takeshi Yamanobe, Keiko Takahashi
Beilstein Journal of Organic Chemistry   10 2997-3006   Dec 2014
© 2014 Suzuki et al; licensee Beilstein-Institut. License and terms: see end of document. Poly(L-lactic acid) (PLLA) is a biodegradable plastic and one of the most famous plastics made from biobased materials. However, its physical strength is ins...
Hiroki Uehara, Takuya Tamura, Kazuki Hashidume, Hidekazu Tanaka, Takeshi Yamanobe
Journal of Materials Chemistry A   2(15) 5252-5257   Apr 2014
Robust and thin membranes of ultra-high molecular weight polyethylene (UHMW-PE) were obtained from a commercial powder material via a melt-drawing technique without any solvent treatment. A combination of rolling and compressing successfully erase...
Hiroki Uehara, Masazumi Saitoh, Ryosuke Morita, Eiichi Akiyama, Takeshi Yamanobe
Macromolecules   47(3) 888-896   Feb 2014
Novel silicone elastomer was obtained by cross-linking reaction of thermal hydrosilylation reaction between poly(oxysilphenylenesiloxydisiloxane) having vinyl groups in side chain and SiH-Terminated hyperbranched polycarbosiloxane. In situ measure...
Hiroki Uehara, Masaki Kakiage, Hidekazu Tanaka, Takeshi Yamanobe
Key Engineering Materials   596 50-54   Jan 2014
Structural deformation during uniaxial drawing of polyethylene-block- polystyrene (PE-b-PS) copolymer film was analyzed by in-situ small angle X-ray scattering (SAXS) measurement. The PE-b-PS film was prepared by solution casting, followed by isot...
Hiroki Uehara, Tomohiro Obana, Masaki Kakiage, Hidekazu Tanaka, Hiroyasu Masunaga, Takeshi Yamanobe, Eiichi Akiyama
Journal of Materials Chemistry C   2(2) 373-381   Jan 2014
A melt-drawing technique was applied to crystalline silicone, poly(tetramethyl-p-silphenylenesiloxane) (PTMPS) containing a rigid phenylene ring in the main chain. The resultant melt-drawn membrane had double-melting endotherms located at the usua...
Hiroaki Horiuchi, Takayuki Kano, Hiroki Uehara, Tetsuo Okutsu
Chemistry Letters   43(9) 1423-1425   Jan 2014
© 2014 The Chemical Society of Japan. A carboxy tetraphenylporphyrin derivative formed aggregate by decreasing its pH, and suppressed its fluorescence and sensitization of singlet oxygen. This indicates that ON/OFF switching of the photosensitizat...
上原 宏樹, 山延 健
成形加工 = Journal of the Japan Society of Polymer Processing : プラスチック整形加工学会誌   25(8) 367-371   Aug 2013
Hiroki Uehara, Makiko Kano, Hidekazu Tanaka, Satomi Kato, Hiroyasu Masunaga, Takeshi Yamanobe
RSC Advances   4(80) 42467-42477   Jan 2014
© 2014 the Partner Organisations. Nanoporous polyethylene (PE) membranes prepared by etching treatment for diblock copolymers composed of PE and polystyrene (PS) are applicable for biotechnological interfaces of various devices. The conventional c...
Hiroki Uehara, Yuuki Arase, Ken Suzuki, Yasumasa Yukawa, Yoshiaki Higuchi, Yasuhiko Matsuoka, Takeshi Yamanobe
Macromolecular Materials and Engineering   299(6) 669-673   Jan 2014
Biaxial melt-drawing produces a high-performance poly(tetrafluoroethylene) (PTFE) membrane with excellent mechanical properties and superior transparency. Unique two-step molding gives the better adhesion between the PTFE powder materials even wit...
Shin Ichiro Kato, Nobutaka Takahashi, Hidekazu Tanaka, Atsushi Kobayashi, Toshitada Yoshihara, Seiji Tobita, Takeshi Yamanobe, Hiroki Uehara, Yosuke Nakamura
Chemistry - A European Journal   19(36) 12138-12151   Sep 2013
Novel tetraalkoxyphenanthrene-fused dehydro[12]-, [18]-, and [24]annulenes 1-3 were synthesized by using Cu-mediated or Pd-catalyzed oxidative macrocyclization reactions as key steps, and their electronic, optical, and electrochemical properties h...
T. Suzuki, K. Takahashi, H. Uehara, T. Yamanobe
Journal of Thermal Analysis and Calorimetry   113(3) 1543-1549   Sep 2013
Simultaneous measurement system of DSC-Raman spectroscopy and its analysis method are developed. The developed method was applied to the melting of Indium and the optimum laser irradiation condition was determined. The obtained result of the heat ...
YAMANOBE Takeshi, KAKIAGE Masaki, MIYAZAKI Noriaki, MORITA Sho, UEHARA Hiroki
高分子論文集   69(5) 235-241   May 2012
A novel in situ pulse NMR measurement system during uniaxial drawing was developed by incorporating drawing and stress-detecting devices into a 1H pulse NMR. The temperature was controlled by heated air or an infrared guided heating system from th...
Yuka Yokoyama, Hiroki Uehara, Takeshi Yamanobe
Key Engineering Materials   534 71-75   Feb 2013
Stereo-complex (Sc) crystallinity and corresponding melting characteristics of poly(L-lactic acid)/poly(D-lactic acid) blend films depend on blending asymmetry. Two different mechanisms for Sc-crystallization are observed in this study. The symmet...
Hiroki Uehara, Tomohiro Obana, Masaki Kakiage, Eiichi Akiyama, Takeshi Yamanobe
Macromolecules   45(18) 7446-7453   Sep 2012
Poly(tetramethyl-p-silphenylenesiloxane) (PTMPS) containing phenyl rings in the main chain is crystallized from solution and melt. Differential scanning calorimetry (DSC) measurements gave a single endotherm for a solution-crystallized sample but ...
Takeshi Yamanobe, Katsunori Ueki, Tadashi Komoto, Hiroki Uehara
Polymer Journal   44(8) 764-771   Aug 2012
The detailed structure and molecular mobility of nascent isotactic polypropylene (iPP) powder was investigated using differential scanning calorimetry, transmission electron microscopy (TEM) and nuclear magnetic resonance (NMR). The crystallinity ...
Hiroki Uehara, Hidekazu Tanaka, Takeshi Yamanobe
Polymer Journal   44(8) 795-801   Aug 2012
The relaxation behaviors of several commercial ultra-high-molecular-weight polyethylene (UHMW-PE) reactor powders were compared. The surface and internal morphologies of these powders were characterized by scanning and transmission electron micros...
Hiroki Uehara, Takuya Tamura, Masaki Kakiage, Takeshi Yamanobe
Advanced Functional Materials   22(10) 2048-2057   May 2012
Crystalline homopolymers, including polyethylene (PE), which has the simplest architecture, form a nanometer-sized combination of crystalline and amorphous components, but their arrangement control, similar to self-assembled phase-separation of bl...
Hiroshi Takahashi, Kenichiro Shimada, Yuzo Yamamoto, Hiroki Uehara
Journal of Macromolecular Science, Part B: Physics   51(2) 336-347   Feb 2012
To understand complex phase behaviors of crystalline or semi-crystalline polymers, it is indispensable to clarify the correlation between the thermal and structural change events. Simultaneous calorimetry/X-ray diffraction measurement is one of th...
YAMANOBE Takeshi, KAKIAGE Masaki, MIYAZAKI Noriaki, MORITA Sho, UEHARA Hiroki
KOBUNSHI RONBUNSHU   69(5) 235-241   2012
A novel in situ pulse NMR measurement system during uniaxial drawing was developed by incorporating drawing and stress-detecting devices into a 1H pulse NMR. The temperature was controlled by heated air or an infrared guided heat...
Masaki Kakiage, Miho Sekiya, Takeshi Yamanobe, Hiroki Uehara
Polymer   52(26) 6146-6153   Dec 2011
Two kinds of polystyrene/polyethylene diblock copolymers exhibiting bicontinuous and spherical microphase separations were blended at different ratios. Initial films were prepared by hot xylene dissolution, followed by casting and drying. The obta...
Hiroki Uehara, Takeshi Yamanobe
Reactor Powder Morphology   43-65   Dec 2011
For semi-crystalline polymers, it is widely accepted that several phases, including crystalline and amorphous phases, coexist within a sample. Reactor powder morphology forms during polymerization with non-equilibrium state, thus it inevitably con...
Susumu Haruta, Hiroaki Misawa, Kosei Ueno, Yukie Yokota, Hiroki Uehara, Hiroshi Hiratsuka, Hiroaki Horiuchi, Tetsuo Okutsu
Journal of Photochemistry and Photobiology A: Chemistry   221 268-272   Jun 2011
Photochemically induced protein crystallization byprotein's multiphoton excitation based on enhanced field of localized surface plasmon resonance (LSPR) of gold nanostructures was investigated. As strong photons-molecules coupling fields, gold nan...
Yasunori Ono, Masaki Kakiage, Takeshi Yamanobe, Yasumasa Yukawa, Yoshiaki Higuchi, Hiroki Kamiya, Kiyotaka Arai, Hiroki Uehara
Polymer   52(4) 1172-1179   Feb 2011
The structure-property relationship during uniaxial drawing of high-molecular-weight ethylene-tetrafluoroethylene copolymer (ETFE) film was analyzed based on a combination of in-situ wide-angle X-ray diffraction (WAXD) and stress measurements. In-...
Masaki Kakiage, Rie Takamatsu, Hiroki Uehara, Takeshi Yamanobe, Keizo Suzuki
Key Engineering Materials   459 57-61   Jan 2011
In this study, we investigated the nano-platelet structures of original and organically modified montmorillonite clays. Atomic force microscope observation gave accurate width and thickness of the nano-platelet clays. The organically modified clay...
Hiroki Uehara, Yusuke Karaki, Shizuka Wada, Takeshi Yamanobe
ACS Applied Materials and Interfaces   2 2707-2710   Oct 2010
Block-copolymer containing a poly(l-lactic acid) (PLLA) segment was blended with pure poly(d-lactic acid) (PDLA) chain in chloroform solution and casted into the dried film. This method could form the stereocomplex (Sc) crystal of PLLA/PDLA within...
Takeshi Yamanobe, Hiroki Uehara, Masaki Kakiage
Annual Reports on NMR Spectroscopy   70 203-239   Jul 2010
Practical analytical methods to investigate the relationship between polymer morphology and properties by a combination of 1H pulse NMR and/or high-resolution NMR in the solid state with other techniques, such as electron microscopy, X-ray diffrac...
Masaki Kakiage, Takuya Tamura, Syozo Murakami, Hiroshi Takahashi, Takeshi Yamanobe, Hiroki Uehara
Journal of Materials Science   45(10) 2574-2579   May 2010
The hierarchical constraint characteristics of ultra-high molecular weight polyethylene (UHMW-PE) fibers with different structures were evaluated by in situ wide-angle X-ray diffraction (WAXD) measurement during heating. Two UHMW-PE fibers were us...
上原 宏樹
Reports of the Eno Science Foundation   3 50-54   2008
Masaki Kakiage, Tomoyuki Ichikawa, Takeshi Yamanobe, Hiroki Uehara, Daisuke Sawai
ACS Applied Materials and Interfaces   in press 633-638   Mar 2010
Structure and property gradation from surface to bulk of poly(l-lactic acid)/poly(d-lactic acid) (PLLA/PDLA) blended films was estimated from nanoscratch tests using scanning probe microscopy (SPM). The PLLA/PDLA blended film was prepared by melti...
Hiroki Uehara, Masaki Kakiage, Miho Sekiya, Tsukasa Yamagishi, Takeshi Yamanobe, Katsuhiko Nakajima, Toshio Watanabe, Kumiko Nomura, Kohei Hase, Masatoshi Matsuda
Macromolecules   42(20) 7627-7630   Oct 2009
A new approach solving the limiting trade-off of conductivity versus water uptake for conventional polymer electrolyte membranes, was designed. Crystalline polyethylene (PE) was selected as the hydrophobic matrix for the targeted block copolymer (...
Hiroki Uehara, Masaki Kakiage, Miho Sekiya, Daisuke Sakuma, Takeshi Yamonobe, Nao Takano, Antoine Barraud, Eric Meurville, Peter Ryser
ACS Nano   3(4) 924-932   Apr 2009
A series of nanoporous membranes prepared from polyethylene-block- polystyrene were applied for size-selective diffusion of glucose and albumin molecules. Millimeter-sized test cells for characterization of such molecular diffusions were designed ...
Masaki Kakiage, Hiroki Uehara, Takeshi Yamanobe
Macromolecular Rapid Communications   29(19) 1571-1576   Oct 2008
A novel in situ measurement system for evaluating molecular mobility during uniaxial drawing of polymeric materials was established by introducing drawing and stress-detecting devices into a 1H pulse nuclear magnetic resonance spectrometer. In thi...
Masaki Kakiage, Miho Sekiya, Takeshi Yamanobe, Tadashi Komoto, Sono Sasaki, Syozo Murakami, Hiroki Uehara
Journal of Physical Chemistry B   112(17) 5311-5316   May 2008
Changes in the crystalline structure during heating of melt-drawn ultrahigh molecular weight polyethylenes (UHMW-PEs) having different molecular characteristics were analyzed by in situ wide-angle X-ray diffraction measurements. A phase transition...
山延 健, 撹上 将規, 上原 宏樹
化学工業   58(11) 851-856   Nov 2007
UEHARA Hiroki
KOBUNSHI RONBUNSHU   64(8) 525-538   Aug 2007
Polymeric materials give different morphologies, depending on the processing conditions, even with the same molecular architectures. If such morphological formation becomes fully controllable, the ultimate properties of molecular chains can be ach...
Hiroki Uehara, Kaori Kato, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto
Journal of Physical Chemistry C   111(51) 18950-18957   Dec 2007
Solution crystallization of polyethylene (PE) with single-walled carbon nanotubes (SWNTs) was investigated by morphological observations and thermal analyses of the resultant films. In this study, long chains of ultrahigh-molecular-weight (UHMW) P...
Takashi Morioka, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto, Yoshiaki Higuchi, Hiroki Kamiya, Kiyotaka Arai, Syozo Murakami, Hiroki Uehara
Macromolecules   40(26) 9413-9419   Dec 2007
The melt-drawing behavior of poly(tetrafluoroethylene) (PTFE) with ultrahigh molecular weight (UHMW) was analyzed using in situ measurements composed of stress-strain curves and wide-angle X-ray diffraction with synchrotron radiation. The stress-s...
Masaki Kakiage, Miho Sekiya, Takeshi Yamanobe, Tadashi Komoto, Sono Sasaki, Syozo Murakami, Hiroki Uehara
Polymer   48(25) 7385-7392   Nov 2007
Phase development during melt-drawing of ultra-high molecular weight polyethylene (UHMW-PE) was analyzed by in situ small-angle X-ray scattering measurements using synchrotron radiation at the SPring-8. Films with different entanglement characteri...
Hiroki Uehara, Kei Ichi Takeuchi, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto
Macromolecules   40(16) 5820-5826   Aug 2007
A nanoperiodic crystalline/amorphous arrangement was homogeneously developed by tensile drawing and subsequent annealing of ultrahigh molecular weight polyethylene (UHMW-PE) lamellae, trapping a large number of molecular entanglements on their sur...
Hiroki Uehara
Kobunshi Ronbunshu   64(8) 525-538   Aug 2007
Polymeric materials give different morphologies, depending on the processing conditions, even with the same molecular architectures. If such morphological formation becomes fully controllable, the ultimate properties of molecular chains can be ach...
Hiroki Uehara, Ayako Uehara, Masaki Kakiage, Hiroshi Takahashi, Syozo Murakami, Takeshi Yamanobe, Tadashi Komoto
Polymer   48(15) 4547-4557   Jul 2007
Polyethylene reactor powders prepared under different conditions were characterized using transmission electron microscopy, 1H nuclear magnetic resonance and X-ray diffraction techniques. The molecular weight of the polyethylene reactor powders wa...
Jun Ichi Suwa, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto, Hiroki Uehara
Langmuir   23(11) 5882-5885   May 2007
Nanoscratch tests using scanning probe microscopy (SPM) were performed on films prepared from two polyethylene (PE) materials polymerized by using a metallocene catalyst system with different molecular weights (MWs). Blended samples were prepared ...
V. Galitsyn, S. Gribanov, M. Kakiage, H. Uehara, Svetlana Khizhnyak, P. Pakhomov, Eleonora Moeller, V. Nikitin, V. Zakharov, A. Tshmel
International Journal of Polymer Analysis and Characterization   12(3) 221-230   May 2007
A series of reactor powders of ultrahigh molecular weight polyethylene obtained using supported and unsupported Ziegler catalysts were studied with the help of low-frequency Raman spectroscopy. This experimental technique allows one to calculate t...
Yuzo Yamamoto, Yuichi Inoue, Teruaki Onai, Chikashi Doshu, Hiroshi Takahashi, Hiroki Uehara
Macromolecules   40(8) 2745-2750   Apr 2007
Phase transformations during heating of β-crystallized isotactic polypropylenes were investigated by simultaneous SAXS, WAXD, and DSC measurements. The isotactic polypropylene samples containing the larger amount of β-form crystals were prepared b...
Hiroki Uehara, Hiroyuki Kimura, Asami Aoyama, Takeshi Yamanobe, Tadashi Komoto
New Journal of Physics   9 65   Mar 2007
The relationship between knot characteristics and breaking mechanisms was investigated for the model filament of apoly(vinylidene fluoride) fishing line. The colouring procedure adopted in this study enabled us to define the accurate breaking posi...
Takeshi Yamanobe, Yoshihito Kurihara, Hiroki Uehara, Tadashi Komoto
Journal of Molecular Structure   829(1-3) 80-87   Mar 2007
Solid-state NMR and TEM measurements were carried out in order to investigate the crystallization behavior of nylon 46 from the perspective of its molecular structure and dynamics. The characteristic chemical shift difference between the crystalli...
Taku Aoike, Daisuke Yokoyama, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Wear   262(5-6) 742-748   Feb 2007
Tribological characteristics of ultra-high molecular weight polyethylene (UHMW-PE) disks molded at 130-190 °C were studied. The highest crystallinity was obtained for the sheet molded at 130 °C, but crystallinity decreased with increasing molding ...
Takeshi Yamanobe, Hiroki Uehara, Tadashi Komoto
Polymer Preprints, Japan   55 4230-4231   Dec 2006
Polyethylene has two stable crystal structures. One is orthorhombic form in which all-trans zigzag planes are perpendicular to each other, the other is monoclinic form in which those planes are parallel to each other. Orthorhombic form is more sta...
Hiroki Uehara, Ryota Yoshida, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto
Industrial and Engineering Chemistry Research   45(23) 7801-7806   Nov 2006
Ultrahigh-molecular-weight polyethylene film was continuously manufactured from reactor powder by calendar rolling under controlled processing conditions. Subsequent tensile drawing above the melting temperature gave a maximum draw ratio of 10 at ...
Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami, Hiroki Uehara
Polymer   47(23) 8053-8060   Oct 2006
The relationship between entanglement characteristics and transient crystallization during drawing from ultra-high molecular weight polyethylene (UHMW-PE) melts is discussed, based on a combination of in situ X-ray measurement and stress profile a...
Hiroki Uehara, Tomomi Hirao, Takeshi Yamanobe, Tadashi Komoto, Yuzo Yamamoto
Polymer   47(20) 7145-7152   Sep 2006
Ultra-high molecular weight isotactic polypropylene (UHMW-iPP) reactor powders have been successfully ultra drawn below melting temperature (Tm) by a combination of calendar rolling and tensile drawing techniques. Two UHMW-iPP reactor powders havi...
Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami, Hiroki Uehara
Journal of Polymer Science, Part B: Polymer Physics   44 2455-2467   Sep 2006
The effects of molecular characteristics and processing conditions on meltdrawing behavior of ultrahigh molecular weight polyethylene (UHMW-PE) are discussed, based on a combination of in situ X-ray measurement and stress-strain behavior. The samp...
Katherina Tsobkallo, Valeria Vasilieva, Masaki Kakiage, Hiroki Uehara, Alexandre Tshmel
Journal of Macromolecular Science - Physics   45(3) 407-415   Jul 2006
A series of reactor powders of ultrahigh molecular weight (UHMW) polyethylenes with different morphology was melted at 160°C for 5 min and cooled in ice water. Low-frequency Roman spectroscopy was used to characterize the straight-chain-segment (S...
Hiroki Uehara, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami
Macromolecular Rapid Communications   27(12) 966-970   Jun 2006
The phase development mechanism during drawing from a highly entangled melt of ultra-high-molecular-weight polyethylene is analyzed by simultaneous measurements of in situ X-ray diffraction using synchrotron radiation and stress/strain behavior. T...
Hiroki Uehara, Tomoyuki Yoshida, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto
Journal of Polymer Science, Part B: Polymer Physics   44(12) 1731-1737   Jun 2006
A polyethylene-block-polystyrene copolymer film having a bicontinuous crystalline/amorphous phases was tensile-drawn under various conditions for the structural arrangement of these phases. The prepared film could be drawn below the melting temper...
Hiroki Uehara, Tomoyuki Yoshida, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto, Kumiko Nomura, Katsuhiko Nakajima, Masatoshi Matsuda
Macromolecules   39(12) 3971-3974   Jun 2006
The preparation of a nanoporous submillimeter thick polyethylene film from a block copolymer and applications, were investigated. Polyethylene (PE)/PS diblock copolymer was chosen as the starting material. The number-average molecular weight (MW) ...
Hiroki Uehara, Tatsuki Asakawa, Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto
Langmuir   22(11) 4985-4991   May 2006
The surface-deformation characteristics of uniaxially drawn poly(ethylene terephthalate) (PET) film were successfully evaluated with multiline scratch tests using scanning probe microscopy (SPM) on a nanometer scale. The PET film was prepared by c...
Effect of Molecular Characteristics and Processing Conditions on Melt-Drawing Behavior of Ultra-High Molecular Weight Polyethylene
Masaki Kakiage, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami, Hiroki Uehara
Journal of Polymer Science, Polymer Physics Edition   44(17) 2455-2467   2006
Jun Ichi Harasawa, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Journal of Electron Microscopy   51(3) 157-166   Jul 2002
A transmission electron microscopy (TEM) study was made to investigate the mechanism of isothermal crystallization from melt for syndiotactic polypropylene (sPP) with a syndiotactic pentad fraction of 0.92. The TEM morphologies of RuO4-stained and...
MATSUDA Hideo, AOIKE Taku, UEHARA Hiroki, YAMANOBE Takeshi, KOMOTO Tadashi
高分子論文集   58(7) 326-331   Jul 2001
J. Harasawa, H. Uehara, T. Yamanobe, T. Komoto, M. Terano
Journal of Molecular Structure   610(1-3) 133-142   Jun 2002
Morphological studies were conducted to investigate the drawability of melt-quenched (MQ) and slowly cooled (MSC) films of syndiotactic polypropylene (sPP) with a high syndiotactic pentad fraction. Transmission electron microscopy (TEM) using the ...
Taku Aoike, Tomokazu Ikeda, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Langmuir   18(7) 2949-2951   Apr 2002
The control of the tribological properties with a series of random copolymers was presented. It was shown that the tribological properties occurring when a stiff slider moves on a polymer surface under conventional macro- and nanotribological cond...
Hiroki Uehara, Taku Aoike, Takeshi Yamanobe, Tadashi Komoto
Macromolecules   35(7) 2640-2647   Mar 2002
Solid-echo 1H NMR relaxation was analyzed for ultrahigh molecular weight polyethylene reactor powders. Their high crystallinities reveal the characteristics of crystalline free induction decay (FID). We propose here a very simple but appropriate f...
H. Matsuda, T. Aoike, H. Uehara, T. Yamanobe, T. Komoto
Kobunshi Ronbunshu   58(7) 326-331   Jan 2001
The surface free energies of linear polyethylene samples having different molecular characteristics and thermal histories were determined, based on electron microscopy observation and differential scanning calorimetric analysis. On the electron mi...
Masahiko Okamura, Takeshi Yamanobe, Tomohiro Arai, Hiroki Uehara, Tadashi Komoto, Seiichi Hosoi, Tatsuo Kumazaki
Journal of Molecular Structure   602-603(1) 17-28   Jan 2002
In order to pursue a possibility of application of radiopaque polymer hydrogels to vascular embolization, studies were made on synthesis of iodine containing copolyanions and properties of their hydrogels with polycation via formation of polyion c...
Taku Aoike, Takahiro Yamamoto, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Langmuir   17(18) 5688-5692   Sep 2001
Surface deformation properties of polystyrene were discussed. The morphology of surfaces was investigated by scratching the surface by the tip of a scanning force microscope. Results showed that the morphology of scratched surfaces of monodisperse...
Taku Aoike, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Langmuir   17(7) 2153-2159   Apr 2001
The macrotribological behavior observed when a Si3N4 ball of a friction tester slid on polystyrene (PS) surface was compared with the nanotribological behavior observed when a Si3N4 tip of a scanning force microscope (SFM) slid on the same surface...
H. Uehara, H. Matsuda, T. Aoike, T. Yamanobe, T. Komoto
Polymer   42(13) 5893-5899   Mar 2001
The effect of prior polymer concentration on solution-crystallized morphologies in ultra-high molecular weight polyethylene has been characterized by transmission electron microscopy (TEM) and X-ray analysis. Molecular motion in crystalline and am...
UEHARA Hiroki
Kobunshi   49(2) 84   Feb 2000
MATSUDA Hideo, YOSHIDA Nobutaka, UEHARA Hiroki, YAMANOBE Takeshi, KOMOTO Tadashi
KOBUNSHI RONBUNSHU   56(10) 702-708   Oct 1999
A new specimen preparation method for transmission electron microscope (TEM) observation of polymeric powder samples is proposed. Powders were placed into a glass-fiber basket, and stained with RuO4 at 60&deg;C. Resultant stained powder...

Books etc

 
Recent Research Developments in Materials Science
Research SignPost   2002   
Reactor Powder Morphology
Nova Science Publishers   2010   
Annual Reprots on NMR Spectroscopy, Volume 70
Elsevier   2010   

Conference Activities & Talks

 
須田裕斗, 小俣智弥, 上原宏樹, 山延健, 津村佳弘
繊維学会予稿集   5 Jun 2019   
永井大介, 森田萌子, 嶋崎正起, 久保彩香, 槇靖幸, 武野宏幸, 森勝伸, 上原宏樹, 山延健
繊維学会予稿集   5 Jun 2019   
周藤康介, 佐藤圭, 奈良大樹, 山延健, 上原宏樹, 小坂田耕太郎, 竹内大介
繊維学会予稿集   5 Jun 2019   
新田紗也花, 武田隼太, 山延健, 上原宏樹, 増永啓康, 青山光輝
繊維学会予稿集   5 Jun 2019   
渡邊希, 東宮大貴, 山延健, 上原宏樹
繊維学会予稿集   5 Jun 2019   
上村茜, 福嶋月乃, 山延健, 上原宏樹, 氏家誠司
繊維学会予稿集   5 Jun 2019   
西條早紀, 吉澤宏亮, 山延健, 上原宏樹, CHEN Pingfan, 小林豊
繊維学会予稿集   5 Jun 2019   
林和宏, 金子献吾, 松本泰昌, 中村洋介, 奈良大樹, 山延健, 上原宏樹, 北村千寿, 加藤真一郎
日本化学会春季年会講演予稿集(CD-ROM)   1 Mar 2019   
Effect of Modified Cyclodextrin on Polylactic Acid / Modified Cyclodextrin Complex
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
In-situ Measurement Recorded during Stretching Silicone Elastomers to Evaluate Changes in Structure and Properties
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
Effect of Kneading Condition and the Composition on the Structure and Physical Properties of EPDM/PP Thermoplastic Elastomer
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
Influence of Molding Conditions on Melt-Drawing Behavior of Metallocene-Catalyzed Ultra-High Molecular Weight Polyethylene Film
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
Investigation of phase formation during stretching for polyoxymethylene-based film containing ethyleneoxide comonomer
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
Structure and Physical Property of Semi-Aromatic Polyamides with various methylene length
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
Kneading Time Dependence of Morphology and Physical Properties of Ethylene Propylene Diene (EPDM) Rubber
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
In-situ Measurements of Uniaxial Melt-Drawing Behavior for Ultra-High Molecular Weight / Normal Molecular Weight Polyethylene Blend Films with Different Entanglement Characteristic
4th Gunma International Symposium on Membranes, 2D Matters and Device Application (GIS 2018)   2018   
Effect of Modified Cyclodextrin on Polylactic Acid / Modified Cyclodextrin Complex
2017   
Non-Solvent Preparation of Nanostructured Membranes of Ultra-High Molecular Weight Polyethylene by Drawing Technique
PSE50   2016   
Preparation of Silicone Elastomer Composite with Crystalline Component and Its Structural Change during Stretching
The International Rubber Conference 2016 (IRC 2016)   2016   
Effect of Kneading Conditions on Morphologies and Properties of Thermoplastic Elastomers
The International Rubber Conference 2016 (IRC 2016)   2016   
Structural Change during Stretching Silicone Elastomers with Different Cross-linking Characteristics
The International Rubber Conference 2016 (IRC 2016)   2016   
Melting Behavior Analysis and Property Evaluation of Cyclic Polyolefin
International Conference on Advanced Engineering and Its Education in 2016 (ICAEE 2016)   2016   
H. Uehara, M. Kakiage, M. Sekiya, D. Sakuma, T. Yamanobe, N. Takano, A. Barraud, E. Eric Meurville, P. Ryser
IFMBE Proceedings   9 Nov 2011   
Nanoporous membranes prepared from various materials have elicited a great deal of interest because nanosized pores provide selectivity for molecules and atoms. Such nanoporous membranes are preferable for application in downsized medical devices ...
Nano-Platelet Structure of Clay Materials Observed by AFM and Its Application for Polymer Composites
International Conference on Advanced Micro-Device Engineering   2009   
Transition and Molecular Orientation Behavior of Crystalline Silicon-Based Polymer
11th Pacific Polymer Conference 2009   2009   
Stereo-Complex Crystallization of Poly(lactic acid) Enhanced in Nanospace Confined by Block Copolymer Phase Separation
11th Pacific Polymer Conference 2009   2009   
Transformation of Crystal Structure of Ultra High Molecular Weight Polyethylene as Studied by Solid State NMR
The 10th Pasific Polymer Conferenre   2007   
Regulated Phase Arrangement of Polystyrene/Poly(dimethylsiloxane) Block Copolymer Film Surface
The 3rd International Symposium on Development of Silicon-based Functional Materials   2007   
Solid-State Characterization of Polyethylene Reactor Powders and Their Structural Changes upon Annealing
Spring meeting of the Polymer Society of Korea   2007   
Structural Change with Blending of Crystalline/Amorphous Block Copolymers Having Different Types of Microphase Separations
The 2nd Gunma International Symposium on Chemistry (GIS2007)   2007   
Extended-Chain Crystallization during Drawing from Ultra-High Molecular Weight Polyethylene Melts
9th International Symposium on Polymers for Advanced Technologies (PAT2007)   2007   
Structural Change during Uniaxial Drawing and Annealing from Amorphous Poly(L-lactic acid)
9th International Symposium on Polymers for Advanced Technologies (PAT2007)   2007   
Structure and Property Gradation from Surface to Bulk As Evaluated by Nano-Scratch Tests Using Scanning Probe Microscopy
9th International Symposium on Polymers for Advanced Technologies (PAT2007)   2007   
Structural Changes during Drawing of Ethylene-alt-Tetrafluoroethylene Copolymer Films as Analyzed by In-situ X-ray Measurements
2007 Materials Research Society Fall Meeting   2007   
Takeshi Yamanobe, Hiroyuki Shida, Emiko Kashimura, Akira Igarashi, Hiroki Uehara, Tadashi Komoto
Polymer Preprints, Japan   18 Oct 2006   
MXD6 has high mechanical strength compared with aliphatic polyamides and therefore is used as the fiber and the film. In this study, the crystallization mechanism and morphology of MXD6 is analyzed. From polarization microscopy and 1H pulse NMR, t...
Yasunori Ono, Takashi Morioka, Masaki Kakiage, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami
Polymer Preprints, Japan   18 Oct 2006   
Structural changes during drawing below and above glass transition temperature (Tg = 100°C) for ethylene-alt-tetrafluoroethylene copolymer (ETFE) films were analyzed by in-process measurements composed of stress/strain curve and X-ray diffraction ...
Masaki Kakiage, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami, Sono Sasaki
Polymer Preprints, Japan   18 Oct 2006   
Phase transition behavior upon heating of melt-drawn ultra-high molecular weight pofyethylenes having different molecular characteristics was analyzed by in-situ X-ray measurements. The crystal transition from orthorhorribic to hexagonal form was ...
In-situ SAXS Analysis of Extended Crystallization during Melt-Drawing of Ultra-High Molecular Weight Polyethylene
XIII International Conference on Small-angle Scattering (SAS 2006)   2006   
Structural Characterization of N-Lignoceryl (C24:0) Sphingomyelin Bilayer Membranes by SAXS and XRD : A Reevaluation
XIII International Conference on Small-angle Scattering (SAS 2006)   2006   
Structural Development of Dynamically Asymmetric Polymer Blends under Uniaxial Elongation
XIII International Conference on Small-angle Scattering (SAS 2006)   2006   
Nano-Periodic Arrangement of Structural Phases of Polyethylene-block-Polystyrene Copolymer as Induced by Orientation Techniques
232nd national meetings & expositions of the American Chemical Society   2006   
In-situ SAXS Analysis of Extended Crystallization during Melt-Drawing of Ultra-High Molecular Weight Polyethylene
232nd national meetings & expositions of the American Chemical Society   2006   
In-Process Analysis for Melt-Drawing Behavior of Polytetrafluoroethylene Using Synchrotron X-Ray Measurements and Resultant Property Development
232nd national meetings & expositions of the American Chemical Society   2006   
Molecular Weight Segregation on Surfaces of Polyethylene Blend Films as Estimated from Nano-Scratch Tests Using Scanning Probe Microsopy
232nd national meetings & expositions of the American Chemical Society   2006   
Transformation of crystal structure of ultra high molecular weight polyethylene as studied by solid state NMR
The 44th Annual Meeting of Japanese NMR Society and the 1st Asian-Pasific NMR Symposium   2006   
Jun Ichi Suwa, Masaki Kakiage, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Polymer Preprints, Japan   1 Dec 2005   
The SPM nano-scratch tests were applied for the films prepared from polyethylene (PE) samples polymerized by using metallocene catalyst system with different molecular weights (MW). A blend sample was prepared by dissolution of both PE samples at ...
Masaki Kakiage, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami
Polymer Preprints, Japan   1 Dec 2005   
Both stress/strain behavior and phase development during melt-drawing of ultra-high molecular weight polyethylenes (UHMW-PEs) having different molecular characteristics were recorded by in-process measurements under several drawing conditions. The...
Takashi Morioka, Masaki Kakiage, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto, Syozo Murakami
Polymer Preprints, Japan   1 Dec 2005   
Melt-drawing behavior of polytetrafluoroethylene (PTFE) films was analyzed by in-situ measurements composed of stress/strain curve and wide-angle X-ray diffraction (WAXD) using synchrotron radiation at SPring-8 BL40B2. The films were prepared by c...
Hiroyuki Takeno, Shinpei Ono, Yuka Iguti, Motosuke Naoki, Hiroki Uehara, Syozo Murakami, Hiroshi Takahashi
Polymer Preprints, Japan   1 Dec 2005   
High pressure experiments up to 1.2 GPa were carried out for immiscible polymer blends under atmospheric pressure. Consequently, it was found that difference in the glass transition temperatures of respective phases becomes smaller and the interfa...
Kenji Hashidume, Keiko Kanou, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Polymer Preprints, Japan   1 Dec 2005   
Polyethylene has two stable crystal structures. One is orthorhombic form in which all-trans zigzag planes are perpendicular to each other, the other is monoclinic form in which those planes are parallel to each other. Orthorhombic form is more sta...
Miho Sekiya, Masaki Kakiage, Hiroki Uehara, Takeshi Yamanobe, Tadashi Komoto
Polymer Preprints, Japan   1 Dec 2005   
Two polyethylene/polystyrene diblock copolymers having cylindrical and spherical phase separation habits were blended with different ratios. Initial films were prepared by hot xylene dissolution, followed by casting and drying. These films were me...
Transformation of Crystal Structure of Ultra High Molecular Weight Polyethylene as Studied by Solid State NMR
The 1st Asi-Pacific NMR Symposium   2005   
Transformation of Crystal Structure of Ultra High Molecular Weight Polyethylene as Studied by Solid State NMR
8th SPSJ International Polymer Conference   2005   
Transient Crystallization during Drawing from Ultra-High Molecular Weight Polyethylene Melts Having Different Entanglement Characteristics
MACRO2004   2004   
Surface Deformation Characteristics of Oriented Poly(ethylene terephthalate) Films as Evaluated from Nano-Scratch Tests with Scanning Probe Microscopy
MACRO2004   2004   
In-Situ Observation of Phase Development during Melt-Drawing of Ultra-High Molecular Weight Polyethylene Using Synchrotron Radiation
19th Annual Meeting of Polymer Processing Society   2003   
Morphology of Polyolefin Reactor Powders and Their Application for Pelletize-Less Processing
8th Japan International SAMPE Symposium and Exhibition   2003   
Morphology of Polyolefin Reactor Powders and Their Application for Pelletize-Less Processing
IUPAC Polymer Conference on the Mission and Challenges of Polymer Science and Technology (IUPAC-PC2002)   2002   
Morphological and NMR Studies on Nascent Isotactic Polypropylene Powders
International Symposium on Furture Technologies for Polyolefin and Olefin Polymerization Catalysis   2001   
Comoparison of Macro/Nanotribology of Polymeric Materials
International Tribology Conference   2000   

Research Grants & Projects

 
Study on structure and properties of polyolefins
Industrial Science and Technology Frontier Program
Project Year: 1997