(US5834523-A)      A composite membrane comprises a porous substrate impregnated with a polymer composition comprising units from the monomer ,,-trifluorostyrene (TFS).    USE -   When the polymer composition includes ion-exchange groups, the composite membranes are particularly useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.    ADVANTAGE -   Polymer that become brittle in a dehydrated state can be rendered mechanically stable, even when fully dehydrated, by impregnating them onto a suitable substrate. Even polymers with poor film-forming properties, or polymer that form films with insufficient mechanical and/or dimensional-stability properties, may be incorporated into composite membranes having the desired physical properties for a wide range of applications.    (EP882088-A1)      A composite membrane comprises a porous substrate impregnated with a polymer composition comprising units from the monomer ,,-trifluorostyrene (TFS).    USE -   When the polymer composition includes ion-exchange groups, the composite membranes are particularly useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.    ADVANTAGE -   Polymer that become brittle in a dehydrated state can be rendered mechanically stable, even when fully dehydrated, by impregnating them onto a suitable substrate. Even polymers with poor film-forming properties, or polymer that form films with insufficient mechanical and/or dimensional-stability properties, may be incorporated into composite membranes having the desired physical properties for a wide range of applications.    (US5985942-A)      A composite membrane comprises a porous substrate impregnated with a polymer composition comprising units from the monomer ,,-trifluorostyrene (TFS).    USE -   When the polymer composition includes ion-exchange groups, the composite membranes are particularly useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.    ADVANTAGE -   Polymer that become brittle in a dehydrated state can be rendered mechanically stable, even when fully dehydrated, by impregnating them onto a suitable substrate. Even polymers with poor film-forming properties, or polymer that form films with insufficient mechanical and/or dimensional-stability properties, may be incorporated into composite membranes having the desired physical properties for a wide range of applications.    (JP2000502625-W)      A composite membrane comprises a porous substrate impregnated with a polymer composition comprising units from the monomer ,,-trifluorostyrene (TFS).    USE -   When the polymer composition includes ion-exchange groups, the composite membranes are particularly useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.    ADVANTAGE -   Polymer that become brittle in a dehydrated state can be rendered mechanically stable, even when fully dehydrated, by impregnating them onto a suitable substrate. Even polymers with poor film-forming properties, or polymer that form films with insufficient mechanical and/or dimensional-stability properties, may be incorporated into composite membranes having the desired physical properties for a wide range of applications.    (EP882088-B1)      A composite membrane comprises a porous substrate impregnated with a polymer composition comprising units from the monomer ,,-trifluorostyrene (TFS).    USE -   When the polymer composition includes ion-exchange groups, the composite membranes are particularly useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.    ADVANTAGE -   Polymer that become brittle in a dehydrated state can be rendered mechanically stable, even when fully dehydrated, by impregnating them onto a suitable substrate. Even polymers with poor film-forming properties, or polymer that form films with insufficient mechanical and/or dimensional-stability properties, may be incorporated into composite membranes having the desired physical properties for a wide range of applications.    (US6258861-B1)      A composite membrane comprises a porous substrate impregnated with a polymer composition comprising units from the monomer ,,-trifluorostyrene (TFS).    USE -   When the polymer composition includes ion-exchange groups, the composite membranes are particularly useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.    ADVANTAGE -   Polymer that become brittle in a dehydrated state can be rendered mechanically stable, even when fully dehydrated, by impregnating them onto a suitable substrate. Even polymers with poor film-forming properties, or polymer that form films with insufficient mechanical and/or dimensional-stability properties, may be incorporated into composite membranes having the desired physical properties for a wide range of applications.