Synthesis and properties of polyimides bearing acid groups on long pendant aliphatic chains

Tomohiro Yasuda, Yi Li, Kenji Miyatake, Michiko Hirai, Masato Nanasawa, Masahiro Watanabe*

*この研究の対応する著者

研究成果: Article査読

44 被引用数 (Scopus)

抄録

A series of novel polyimide electrolytes having long pendant sulfo- or phosphoalkoxy groups were synthesized for fuel-cell applications. Sulfodecyloxy-, phosphodecyloxy-, and sulfophenoxydodecyloxy-substituted benzidine monomers were synthesized from dihydroxybenzidine. These monomers were copolymerized with naphthalene tetracarboxylic dianhydride and fluorenylidene dianiline to give the corresponding polyimides. A flexible, ductile, and self-standing membrane was obtained via casting from the polyimide solution. Because the acid groups were on long pendant side chains and away from the main chains, the polyimide membrane showed improved oxidative and hydrolytic stability in comparison with the polyimides with sulfonic acid groups on the main chains or on the short side chains. High thermal stability (no glass-transition temperature and a decomposition temperature > 200°C) was also obtained. The polyimide membrane displayed high proton conductivity of 10-1 S cm-1 at 120°C.

本文言語English
ページ(範囲)3995-4005
ページ数11
ジャーナルJournal of Polymer Science, Part A: Polymer Chemistry
44
13
DOI
出版ステータスPublished - 2006 7 1
外部発表はい

ASJC Scopus subject areas

  • ポリマーおよびプラスチック
  • 有機化学
  • 材料化学

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