alpha , beta , beta -TRIFLUOROSTYRENE-BASED AND SUBSTITUTED alpha , beta , beta -TRIFLUOROSTYRENE-BASED COMPOSITE MEMBRANES

摘要

A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of alpha , beta , beta -trifluorostyrene, substituted alpha , beta , beta -trifluorostyrene and ethylene-based monomeric units. Where the polymeric composition includes ion-exchange moieties, the resultant composite membranes are useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.