| abstract |
Membranes comprising sulfonated polyether ketone and another polymer, process for their production, and their use, Membranes comprising from 30 to 99.5% by weight of a sulfonated, strictly alternating polyether ketone (A) having repeat units of the formula (I) -Ar-O-Ar'-CO-, where Ar and Ar', independently of one another, are bivalent aromatic radicals, with an ion exchange capacity of from 1.3 to 4.0 meq of -SO<SUB>3</SUB>H/g of polymer and from 0.5 to 70% by weight of a partially fluorinated, nonfluorinated or perfluorinated polymer (B) are described. The membranes may be used in fuel cells. |