Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 298, Issue 1-2, Pages 48-55Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2007.03.057
Keywords
sulfonated poly(aryl ether ketone); multi-block copolymer; cross-linking; proton conductivity; methanol permeability
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Multi-block copolymers of sulfonated poly(aryl ether ketone) (PAEK) were synthesized by polycondensation of aromatic dihalide, bisphenol and hydroxy-terminated sulfonated oligomer, which was synthesized from sulfonated aromatic dihalide and bisphenol. These sulfonated PAEKs had benzophenone units and methyl moieties in their structure, and they could be cross-linked by UV irradiation. The effects of the multi-block structure were investigated by comparison of the properties of the multi-block copolymer and a random copolymer. The multi-block structure could reduce the methanol permeability efficiency without decreasing the proton conductivity, and it was concluded that the combination of a multi-block structure and a cross-linking system is a useful method for sulfortated PAEKs for the proton-exchange membrane in a DMFC. (c) 2007 Elsevier B.V. All rights reserved.
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