| abstract |
Sulfonated poly (arylene ether) copolymer having a crosslinked structure inside the polymer chain, sulfonated poly (arylene ether) copolymer having a crosslinked structure inside the polymer chain and at the polymer terminal, and a polymer electrolyte formed therefrom The membrane is disclosed. Sulfonated dihydroxy monomer (HO-SAr1-OH), unsulfonated dihydroxy monomer (HO-Ar-OH), crosslinkable dihalide monomer (X-CM-X) and unsulfonated dihalide A poly (arylene ether) copolymer containing sulfonic acid is synthesized according to the polycondensation reaction of the monomer (X-Ar-X). The poly (arylene ether) copolymer formed has a crosslinkable structure inside the polymer chain. In addition, the polyhydroxyl reaction of the crosslinkable monohydroxy monomer or the crosslinkable mono halide monomer enables crosslinking to the terminal of the polymer. Through this, thermal stability, mechanical stability, chemical stability, membrane formation ability, etc., while maintaining the equivalent level or more than the current Nafion membrane used as a commercially available polymer electrolyte membrane, it shows an excellent effect in terms of cation conductivity and cell performance. Moreover, even if it is exposed to moisture for a long time, there is no change in the characteristics of the electrolyte membrane, which shows high dimensional stability. |