Polyimide ionomer containing superacid groups

Jumpei Saito, Manabu Tanaka, Michiko Hirai, Masato Nanasawa, Kenji Miyatake*, Masahiro Watanabe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A novel sulfonated polyimide (SPI) copolymer containing pendant perfluorosulfonic acid groups was synthesized and their properties were investigated. 2-(2,4-Diaminophenoxy)-1,1,2,2-tetrafluoroethanesulfonic acid (5) was synthesized from 2,4-diaminophenol dihydrochloride via acetylation, perfluoroalkylation, and sulfonation. Polycondensation of 1,4,5,8-naphthalenetetracarboxylic dianhydride, monomer 5, and 3,5-bis(4-aminophenyl)-1H-1,2,4-triazole gave the title polyimide 6. The obtained polyimide copolymer 6 was soluble in polar organic solvents and its chemical structure and ion exchange capacity were confirmed by 1H and 19F NMR spectra. The copolymer 6 was thermally stable up to ca. 180°C and showed 6.6×10-4Scm-1 of the proton conductivity at 80°C in water.

Original languageEnglish
Pages (from-to)1305-1310
Number of pages6
JournalPolymers for Advanced Technologies
Issue number8
Publication statusPublished - 2011 Aug
Externally publishedYes


  • Fuel cells
  • Ionomers
  • Polyimides
  • Proton conduction
  • Superacid groups

ASJC Scopus subject areas

  • Polymers and Plastics


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