| 摘要 |
The invention relates to a sulfonated, aromatic polymer comprising the recurring structural unit of formula (I): -O-Ar<1>(SO3R)n-C(CF3)2-Ar<1>(SO3R)n-O-Ar<2>-(X-Ar<2>)m-, wherein Ar<1> and Ar<2> represent independently of each other bivalent aromatic or heteroaromatic substituted radicals that may contain one or several monovalent organic groups which are inert under actual operating conditions, R represents hydrogen, an alkaline or alkaline earth ion or an ammonium ion, n is a whole number from 0 to 3, m is 0, 1 or 2 and X represents a group -CO-, -O-, -CpH2p-, -CpF2p- or -S-, wherein p is a whole number from 1 to 10. These polymers can be processed into membranes with a high proton conductability. Preferably, said membranes are used in fuel cells. |
