論文

査読有り
2017年1月

Dimensional Characterizations from Rod Stars to Brushes of Polymers with a Low Degree of Polymerization

MACROMOLECULES
  • Moriya Kikuchi
  • ,
  • Atsushi Takahara
  • ,
  • Seigou Kawaguchi

50
1
開始ページ
324
終了ページ
331
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.macromol.6b02251
出版者・発行元
AMER CHEMICAL SOC

Dimensional characterizations from rod stars to brushes (PSt-g-HIC-32) with a relatively low degree of polymerization of the main chain have been studied in tetrahydrofuran (THF) at 25 degrees C by employing synchrotron radiation small-angle X-ray scattering, static and dynamic light scatterings, and viscosity measurements. The rod stars and brushes consist of a flexible linear polystyrene (PSt) main chain and 32 n-hexyl isocyanate (HIC) units in each side chain. Eight PSt-g-HIC-32 samples with a weight average degree of polymerization (N-M) of 11-495 of the main chain and a narrow molecular weight distribution (M-w/M-n) of 1.08-1.17 were prepared using a recycling preparative size-exclusion chromatography (SEC) system. The mean-square radius of gyration (< S-2 >), hydrodynamic radius (R-H), and intrinsic viscosity ([eta]) of the stars and brushes were tabulated. The absolute calibration curve obtained in SEC analysis, scattering form factor, and rho (=< S-2 >(1/2)/R-H) parameter indicated a continuous change in the shape from the rod star to rod brush on increasing the aspect ratio of the main chain to the side chain. The N-M dependences of < S-2 >, R-H, and [eta] were consistently and quantitatively described using the current theories based on a wormlike (sphero-) cylinder model by taking into account the effective protruding effects of the side chains near the ends of the main chain.

Web of Science ® 被引用回数 : 5

リンク情報
DOI
https://doi.org/10.1021/acs.macromol.6b02251
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000391898000031&DestApp=WOS_CPL

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