| http://www.w3.org/ns/prov#value | - The polymeric membrane may comprise virtually any polymeric material, for example vinyl polymers, styrene, acrylate, methacrylate, polyethylenes, polypropylenes, polyacrylonitrile, polyacrylarnide, poly vinyl chloride, fluoropolymers including PTFE, condensation polymers, polysulfone, polyimides, polyamides, polycarbonates, polysulfides, polyesters, polyanhydrides, polyacetals, polyurethanes, poly
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