| abstract |
A polymer having a sulfonic acid group with improved hot water resistance and radical resistance (durability), a solid polymer electrolyte comprising the polymer, and a proton conductive membrane comprising the electrolyte are provided. A polymer electrolyte comprising a sulfonated polymer represented by the following general formula (1). Embedded image [Wherein, X and Y are bonded in random, alternating or block form, and x and y each represent a number of 2 or more. ] [Selection diagram] None |