| abstract |
The invention relates to polymer films based on polyazoles, which are soluble in N, N-dimethylacetamide 0 to 20 wt .-% in terms of their Polyazolgehalt at 130 ° C and 1000 hPa, process for their preparation and their use as polymer electrolyte membranes for the production of membrane electrode assemblies for fuel cells and as a semi-permeable membrane for the separation of liquids and gases. |