| abstract |
An object of the present invention is to provide a polyarylene having a sulfonic acid group having excellent processability and methanol resistance. A polyarylene according to the present invention includes a structural unit (S) represented by the following general formula (2-2) and a structural unit (T) represented by the following general formula (2-3). The ratio s of (S) is 95 to 50 mol%, and the ratio t of the structural unit (T) is 5 to 50 mol% (here, s + t = 100 mol%). (In the formula, A represents a divalent linking group independently represented by —CO— or —SO 2 —, and R 1 to R 4 each independently represents a hydrogen atom, a fluorine atom, an alkyl group or an aryl group. Represents a group.) [Selection figure] None |