Synthesis and properties of sulfonated poly(arylene ether)s containing azole groups

Byungchan Bae, Shinya Kawamura, Kenji Miyatake, Masahiro Watanabe

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Random and multiblock sulfonated poly(arylene ether sulfone)s (SPEs) containing various azole groups such as oxadiazole and triazole were synthesized and characterized for fuel cell application. Successful preparation of SPE membranes depended on the structure of azole groups, which affected solubility of precursors and the resulting SPEs. Although oxadiazole groups were incorporated into hydrophobic component, they were found to be hydrophilic to give higher proton conductivity. Introduction of oxadiazole groups into random SPE gave comparable proton conductivity to that of Nafion NRE at >60% relative humidity at 80 °C. Block copolymer structure further increased the proton diffusion coefficient without increasing ion exchange capacity. Hydrolytic and oxidative stability of the SPE membranes was affected by both hydrophilic and hydrophobic components. Oxadiazole groups gave negative impact on hydrolytic and mechanical stability to the SPE membranes.

Original languageEnglish
Pages (from-to)3863-3873
Number of pages11
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume49
Issue number17
DOIs
Publication statusPublished - 2011 Sep 1

Keywords

  • azoles
  • block copolymers
  • ionomers
  • poly(ether sulfones)
  • sulfonation

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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