| abstract |
Provision of an electrolytic material having a high proton conductivity and excellent resistance to hot water resistance. And a polymer H having a unit represented by the formula u1 and a unit based on tetrafluoroethylene and having an equivalent weight EW of 400 to 550 g / equivalent of the polymer H and immersed in hot water at 120 DEG C for 24 hours Wherein the reduction ratio is 15 mass% or less. Q 11 is a perfluoroalkylene group which may have an etheric oxygen atom, Q 12 is a perfluoroalkylene group which may have a single bond or an etheric oxygen atom, Y 1 is a fluorine atom or the like, s is 0 or 1, R f1 represents a perfluoroalkyl group which may have an etheric oxygen atom, X 1 represents an oxygen atom, and a represents 0, Z + : H + or the like when X 1 is an oxygen atom. |