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Polyimide ionomer containing superacid groups
Author(s) -
Saito Jumpei,
Tanaka Manabu,
Hirai Michiko,
Nanasawa Masato,
Miyatake Kenji,
Watanabe Masahiro
Publication year - 2011
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1924
Subject(s) - polyimide , copolymer , superacid , condensation polymer , monomer , polymer chemistry , materials science , ionomer , polymer , organic chemistry , catalysis , chemistry , layer (electronics) , composite material
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 1 H and 19 F NMR spectra. The copolymer 6 was thermally stable up to ca . 180°C and showed 6.6 × 10 −4 S cm −1 of the proton conductivity at 80°C in water. Copyright © 2011 John Wiley & Sons, Ltd.