TECHNOLOGY FOCUS - POLYMERS - Preferred Method: Step (A) involves adding polymer B in amounts of 10-50 wt% based on the mixture (A and/or B). Step (B) involves heating after forming a sheet of material as in (C). Step (D) involves treatment for 10 seconds to 300 hours at 0-150degreesC in presence of moisture. The membrane obtained after (D) is crosslinked by the action of oxygen. A layer with a thickness of 20-4000 microns is formed in step (C), a membrane with a thickness of 15-3000 microns is formed in (D), and electrodes made by this method have a conductive polymer coating with a thickness of 2-3000 microns.Preferred Blend Partners: Polymer B comprises polyolefins, polymers with C-O, C-S or C-N bonds, inorganic polymers and/or sulfonated polymers.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Starting Materials: The mixture obtained in step (A) contains compounds which form polyazoles on heating, i.e. (hetero)aromatic tetra-amino compounds and di- or poly-carboxylic acids and/or diamino-carboxylic acids, preferably by heating in the melt at up to 400degreesC. Suitable compounds comprise:(a) 3,3,4,4-tetra-amino-biphenyl, 2,3,5,6-tetra-amino-pyridine and 1,2,4,5-tetra-aminobenzene;(b) (hetero)aromatic di-acids or their derivatives, e.g. phthalic, isophthalic, terephthalic acids and various substituted derivatives thereof, diphenic acid, naphthalenedicarboxylic acids, benzophenone-4,4-dicarboxylic acid, biphenyl-4,4-dicarboxylic acid, 4-carboxycinnamic acid etc. (35 di-acids listed);(c) tri- or tetra-acids and their derivatives, especially e.g. trimesic, trimellitic, benzene-1,2,4,5-tetracarboxylic, naphthalene-1,2,4,5-tetracarboxylic acid etc. (14 acids listed), in amounts of 0-30 (preferably 0.5-10) mol% based on the amount of di-acid;(d) heteroaromatic acids, preferably pyridine-2,5-, -3,5-, -2,6- or -2,4-dicarboxylic acid, similar derivatives of pyrazole, pyrimidine, pyrazine or benzimidazole, pyridine-2,4,6-tricarboxylic acid, etc. (10 acids listed);(e) diaminobenzoic acids and/or their mono- or di-hydrochlorides.