Sulfonated block polyimide copolymers as a proton-conductive membrane

Naoki Asano, Kenji Miyatake, Masahiro Watanabe

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

The synthesis of a series of block sulfonate polyimide (SPI) ionomers to control hydrophilic and hydrophobic phase separation for the improvement of the proton conductivity at low humidity conditions, is presented. The new block SPI-B ionomer membranes showed chemical stability comparable to that of SPI-R equivalent. The block/block copolymer SPI-B150/150 membrane, containing long block segments in both the hydrophilic and the hydrophobic components, showed the highest proton conductivity. STEM observations confirmed widespread and well-connected hydrophilic domains, which proves the high proton-transporting properties of the SPI-B150/150.

Original languageEnglish
Pages (from-to)2744-2748
Number of pages5
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume44
Issue number8
DOIs
Publication statusPublished - 2006 Apr 15
Externally publishedYes

Keywords

  • Block copolymers
  • Conducting polymers
  • Fuel cells
  • Ionomers
  • Membranes
  • Polyimides

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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