A Study of the Nitrogen-Containing Heterocycles on Copolyimide Properties for Proton Exchange Membranes

Abstract:

Containing pyrimidine and pyridine monomers were incorporated respectively into the main chain of a sulfonated polyimide in order to investigate the effect of nitrogen-containing heterocycles on membrane properties such as water uptake and proton conductivity. With increasing content of the nitrogen-containing heterocycles, water uptake of membranes and dimensional changes remarkable decrease. The copolymer showed higher thermal stability (desulfonation temperature up to 330 °C) and reasonable good mechanical properties. These membranes also showed higher proton conductivity, which was comparable or even higher than Nafion 117.

• Periodical: Applied Mechanics and Materials (Volumes 401-403)
• Pages: 563-566
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.401-403.563
• Online since: September 2013
• Authors: Yu Han Li, Wei Jian Wang, Yu Fei Chen, Lei Wang
• Keywords: Nitrogen-Containing Heterocycles, Pyridine, Pyrimidine Group, Sulfonated Polyimide

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