Branched and cross-linked proton conductive poly(arylene ether sulfone) lonomers: Synthesis and properties

Yohei Chikashige, Yoshiki Chikyu, Kenji Miyatake, Masahiro Watanabe

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

A series of branched and cross-linked poly (arylene ether sulfone) ionomers containing sulfofluorenyl groups, 2b-e were synthesized in order to investigate the effect of these chemical modifications on the properties. Ionomers 2b-e gave a flexible, ductile, and transparent membrane by casting from DMAc solution. The branching and cross-linking were effective to improve the dimensional stability under wet conditions without losing their high thermal, oxidative, and hydrolytic stability. The cross-linked ionomer 2e (IEC = 2.63 meq-g-1) membrane showed high proton conductivity of 0.2 S · cm-1 at 87% RH and 0.02 S · cm-1 at 57% RH. The branched ionomer 2b membrane was durable in proton conductivity for almost 2 months without any chemical degradation.

Original languageEnglish
Pages (from-to)1334-1343
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume207
Issue number15
DOIs
Publication statusPublished - 2006 Aug 2
Externally publishedYes

Keywords

  • Conducting polymers
  • Fuel cells
  • Ionomers
  • Membranes
  • Polyethers

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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