| abstract |
A crosslinkable ionically conducting resin which consists of a crosslinkable polyether ketone comprising repeating units represented by the general formula (1): (1) [wherein Ar1 and Ar2 are each a divalent group having two or more aromatic rings, at least two of which rings are connected by alkylene, wherein one or more hydrogen atoms of the aromatic rings may be replaced by halogeno, alkyl having 1 to 10 carbon atoms, haloganated hydrocarbyl, or a protonic acid group, and the alkylene is a group of 1 to 10 carbon atoms, at least either of the carbon atoms of which are bonded to the aromatic rings is attached to at least one hydrogen; X and Y are each a protonic acid group selected from among sulfonic acid group, carboxylic acid group, phosphoric acid group, sulfonimido, and alkylsulfonic acid groups of 1 to 10 carbon atoms or a group of a metal salt thereof; x and y are each an integer of 0 to 4 and satisfy the relationship: x + y > 1; and a and b are each an integer of 1 or above]. Polymer membranes and binders made by using the resin are suitable for fuel cells. |