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Direct Synthesis of Fully Sulfonated Polyarylenethioether Sulfones as Proton-Conducting Polymers for Fuel Cells

✍ Scribed by Zongwu Bai; Thuy D. Dang

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
171 KB
Volume
27
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: SPTES polymers have been successfully synthesized by direct polymerization using tetramethylene sulfone as the solvent. The chemical structures of the SPTES polymers are confirmed by FT‐IR and NMR spectroscopy. The thermal stability is characterized by TGA, and the results show that the sulfonated groups on the polymer backbone are stable up to 300 °C. The measured proton conductivity reaches values above 300 mS · cm^−1^ at 65 °C and 85% relative humidity. Tough, ductile, free‐standing membranes have been fabricated by solution casting from N,N‐dimethylacetamide, which indicates that the SPTES polymers have excellent membrane‐forming capability and mechanical property. The mono‐functional monomers are introduced into the polymerization to end‐cap the SPTES polymers. The end‐capping groups are effective in improving water resistance, oxidative stability, and retaining the proton conductivity.

Fully sulfonated polyarylenethioether sulfone.

magnified imageFully sulfonated polyarylenethioether sulfone.

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