Membranes containing sulfonated polyetherketone and another polymer, method for the production and use thereof
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United States of America Patent
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Jul 5, 2005
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N/A
app pub date -
Sep 18, 1999
filing date -
Oct 16, 1998
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Expired
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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 -SO3H/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.
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