| 摘要 |
PURPOSE: Poly (arylene ether sulfone) copolymer is provided to offer 'fuel cell polymer electrolyte membrane having high hydrogen ion conductivity in a condition of low humidification, excellent dimensional stability and unit cell performance, and low methanol permeation'. CONSTITUTION: A poly (arylene ether sulfone) copolymer of fluorene base comprises 'recurring unit represented by following chemical formula(1)' Here, Y is respectively selected from single bond, -S-, -O- or - S (=O) 2- and Ar is respectively bivalency or trivalency of C5~24 arylene group or bivalency or trivalency of C5~24 heteroarylene group. At least one of these is substitute or non-substitute to C1~10 alkyl group, alkoxy group, halo alkyl group, haloalkoxy group or cyan group. R is - O (CH2) mSO3H, and m is an integer of 1-6. 0 < n < 1. |
