POLYMER AND PROTON CONDUCTIVE MEMBRANE

PROBLEM TO BE SOLVED: To provide a polymer improved in heat stability, precisely, having a sulfonic acid group highly stable under high temperature conditions and high durability in high temperature power generation when used as a proton conductive membrane in fuel cells, and excellent in proton conductivity in a low humidity range. SOLUTION: A polyarylene having a structure expressed by formula -Rs-Z-Rhis provided. In the formula, Z represents at least one kind of structures selected from the group consisting of -CO-, -SO2-, -SO-; Rsrepresents a direct bond or an arbitrary divalent organic group; Rhrepresents a nitrogen-containing heterocyclic group. The nitrogen-containing group in formula (1) is at least one kind of groups selected from the group consisting of nitrogen-containing compounds comprising pyrrole, thiazole, isothiazole, oxazole, isoxazole, pyridine, imidazole, imidazoline, pyrazole, 1,3,5-triazine, pyrimidine, pyridazine, pyrazine, indole, quinoline, isoquinoline, purine, benzimidazole, benzoxazole, benzthiazole, tetrazole, tetrazine, triazole, carbazole, acridine, quinoxaline and quinazoline, and derivatives thereof. COPYRIGHT: (C)2010,JPO&INPIT