High-molecular polyazoles

摘要

Polyazoles (I) with an intrinsic viscosity of at least 1.3 dl/g are produced by preparing a reaction mixture comprising an aromatic tetramine and an aromatic polycarboxylic acid or ester, or a (hetero)aromatic diamino carboxylic acid, heating the mixture to 350[deg]C or less under an inert gas, comminuting the mixture, fractionating the particles, heating the 300-1000 mu m fraction to 450[deg]C or less under an inert gas, and cooling the product. Independent claims are also included for: (1) solutions of (I) in polar aprotic solvents; (2) shaped products, fibers, films and coatings comprising (I); (3) proton-conducting membranes comprising (I) and dopants; (4) membrane electrode unit comprising at least one electrode and at least one proton-conducting membrane as above.