Highly sulfonated poly(aryl ether ketone) block coplymers having a cross-linking structure

✍ Scribed by Jun-ichi Ishikawa; Satoko Fujiyama; Koji Inoue; Takehiko Omi; Shoji Tamai

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 782 KB
• Volume: 298
• Category: Article
• ISSN: 0376-7388
• DOI: 10.1016/j.memsci.2007.03.057

✦ Synopsis

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 sulfonated PAEKs for the proton-exchange membrane in a DMFC.