This work is respectfully dedicated to the memory of Prof. Dr Eishun Tsuchida, who was a Ph.D. supervisor of K.M. at Waseda University and encouraged him with this research.
Polyimide ionomer containing superacid groups†
Article first published online: 27 FEB 2011
Copyright © 2011 John Wiley & Sons, Ltd.
Polymers for Advanced Technologies
Special Issue: Special issue dedicated to the memory of Professor Eishun Tsuchida
Volume 22, Issue 8, pages 1305–1310, August 2011
How to Cite
Saito, J., Tanaka, M., Hirai, M., Nanasawa, M., Miyatake, K. and Watanabe, M. (2011), Polyimide ionomer containing superacid groups. Polym. Adv. Technol., 22: 1305–1310. doi: 10.1002/pat.1924
- Issue published online: 26 JUL 2011
- Article first published online: 27 FEB 2011
- Manuscript Accepted: 20 DEC 2010
- Manuscript Revised: 9 DEC 2010
- Manuscript Received: 12 OCT 2010
- New Energy and Industrial Technology Development Organization (NEDO) through the Research on Nanotechnology for High-Performance Fuel Cells (HiPer-FC) Project
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan through a Grant-in-Aid for Scientific Research. Grant Number: 20350086
- fuel cells;
- proton conduction;
- superacid groups
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 × 10−4 S cm−1 of the proton conductivity at 80°C in water. Copyright © 2011 John Wiley & Sons, Ltd.