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Anhydrous Polymer Electrolyte Membranes Prepared From Polystyrene-b-Poly (hydroxyl ethyl methacrylate) Block Copolymer  

Kim, Jong-Hak (Department of Chemical and Biomolecular Engineering, Yonsei University)
Seo, Jin-Ah (Department of Chemical and Biomolecular Engineering, Yonsei University)
Lee, Do-Kyung (Department of Chemical and Biomolecular Engineering, Yonsei University)
Roh, Dong-Kyu (Department of Chemical and Biomolecular Engineering, Yonsei University)
Shul, Yong-Gun (Department of Chemical and Biomolecular Engineering, Yonsei University)
Publication Information
Membrane Journal / v.19, no.4, 2009 , pp. 302-309 More about this Journal
Abstract
A block copolymer of polystyrene-b-poly (hydroxyl ethyl methacrylate), PS-b-PHEMA, was synthesized via atom transfer radical polymerization (ATRP) and crosslinked with 4,5-imidazole dicarboxylic acid (IDA) via esterification of the -OH groups of PHEMA in the block copolymer and the -COOH groups of IDA. Upon doping with $H_3PO_4$ to form imidazole-$H_3PO_4$ complexes, the proton conductivity of the membranes continuously increased as the content of $H_3PO_4$ increased. In addition, both the tensile strength and the elongation at break increased with IDA content. A proton conductivity of 0.01 S/cm at $100^{\circ}C$ was obtained for the PS-b-PHEMA/IDA/$H_3PO_4$ membrane with [HEMA]:[IDA]:[$H_3PO_4$] = 3:4:4 under anhydrous conditions. All of the PS-b-PHEMA/IDA/$H_3PO_4$ membranes were thermally stable up to $350^{\circ}C$, as revealed by thermal gravimetric analysis (TGA).
Keywords
atom transfer radical polymerization; block copolymer; crosslink; proton conductivity; anhydrous polymer electrolyte membrane;
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Times Cited By KSCI : 5  (Citation Analysis)
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