論文

査読有り 筆頭著者
2019年2月

Drastic Change of Mechanical Properties of Polyrotaxane Bulk: ABA-BAB Sequence Change Depending on Ring Position

ACS MACRO LETTERS
  • Shuntaro Uenuma
  • ,
  • Rina Maeda
  • ,
  • Kazuaki Kato
  • ,
  • Koichi Mayumi
  • ,
  • Hideaki Yokoyama
  • ,
  • Kohzo Ito

8
2
開始ページ
140
終了ページ
144
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acsmacrolett.8b00896
出版者・発行元
AMER CHEMICAL SOC

Polyrotaxane (PR), consisting of many ring molecules and an axis polymer, is a typical supramolecular structure with unique topological characteristics. In this study, we demonstrated the drastic change of the macroscopic mechanical properties depending on the ring position of PR in bulk. Poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer was employed as an axis polymer to control the position of beta-cyclodextrin (beta-CD). To transfer the beta-CD positions, hydroxypropyl groups (HPPR) and hydrophobic trimethyl silyl groups (TMS-HPPR), which have hydrophilic and hydrophobic beta-CD, respectively, were synthesized. beta-CDs in HPPR were localized on a central PPO segment and formed crystal domains. The axis polymer of HPPR could not bridge beta-CD crystal domains, resulting in a melt state at high temperature. On the other hand, beta-CDs in TMS-HPPR were transferred to both PEO segments and formed crystal domains. The axis polymer in TMS-HPPR could bridge the beta-CD crystal domains, resulting in an elastic state even at high temperature. We succeeded in demonstrating the potential ability of PR: the macroscopic mechanical properties of PR can be changed from a melt state to an elastic one by manipulating the ring positions.

リンク情報
DOI
https://doi.org/10.1021/acsmacrolett.8b00896
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000459948600009&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/acsmacrolett.8b00896
  • ISSN : 2161-1653
  • Web of Science ID : WOS:000459948600009

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