(WO9954389-A1)   NOVELTY - Polymer blends and membranes are prepared by reaction of a polymeric sulfonic acid salt with a primary, secondary or tertiary nitrogen containing polymer.    USE - The acid-base polymer blends are useful in the form of a thin film as a proton conductive electrolyte in membrane fuel cells (H2-polymer electrolyte or direct methanol fuel cells), in polymer electrolyte membrane electrolysis, in aqueous or non-aqueous electrodialysis or diffusion dialysis or as membranes or hollow fibers for pervaporation, per-extraction, gas separation, dialysis, ultrafiltration, nanofiltration or reverse osmosis (claimed).    ADVANTAGE - The polymer blends have high mechanical, chemical and thermal stability.    (EP1073690-A1)   NOVELTY - Polymer blends and membranes are prepared by reaction of a polymeric sulfonic acid salt with a primary, secondary or tertiary nitrogen containing polymer.    USE - The acid-base polymer blends are useful in the form of a thin film as a proton conductive electrolyte in membrane fuel cells (H2-polymer electrolyte or direct methanol fuel cells), in polymer electrolyte membrane electrolysis, in aqueous or non-aqueous electrodialysis or diffusion dialysis or as membranes or hollow fibers for pervaporation, per-extraction, gas separation, dialysis, ultrafiltration, nanofiltration or reverse osmosis (claimed).    ADVANTAGE - The polymer blends have high mechanical, chemical and thermal stability.    (US6194474-B1)   NOVELTY - Polymer blends and membranes are prepared by reaction of a polymeric sulfonic acid salt with a primary, secondary or tertiary nitrogen containing polymer.    USE - The acid-base polymer blends are useful in the form of a thin film as a proton conductive electrolyte in membrane fuel cells (H2-polymer electrolyte or direct methanol fuel cells), in polymer electrolyte membrane electrolysis, in aqueous or non-aqueous electrodialysis or diffusion dialysis or as membranes or hollow fibers for pervaporation, per-extraction, gas separation, dialysis, ultrafiltration, nanofiltration or reverse osmosis (claimed).    ADVANTAGE - The polymer blends have high mechanical, chemical and thermal stability.