| 초록 |
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 IDAat 130oC.As forming imidazole-H3PO4 complexes with doping of H3PO4, the proton conductivity of the membranes continuously increased as the content of H3PO4 increased. In addition, both the elongation at break and thetensile strengthincreased with IDA content. A proton conductivity of 0.01 S/cm at 100°C was obtained for the PS-b-PHEMA/IDA/H3PO4 membrane with [HEMA]:[IDA]:[H3PO4] = 3:4:4 under anhydrous conditions. All of the PS-b-PHEMA/IDA/H3PO4 membranes were thermally stable up to 350°C. |
