ELECTROCHEMICAL PROPERTIES OF CATION-EXCH ANGE MEMBRANES BASED ON SULFONATE-CONTAINING AROMATIC POLYAMIDES AND POLYMERS WITHOUT IONOGENIC GROUPS

Electrochemical properties of cation-exchange membranes prepared from mixture of sulfonate-containing polyamide and weakly interacting with it PVC (heterogeneous membranes) and strongly interacting with it poly (m-phenyl isophthalamide) (homogeneous membranes) were studied. Sulfon de-containing aromatic polyamide was synthesized from sodium salt of 4 ,4'-diaminodiehenylamine-2-sulfonic acid and chloroanhydride of isopht halic acid. As compared with homogeneous membranes, heterogeneous memb ranes show a sharp increase in specific electroconductivity in a wide range of static exchange capacity (10-50 times). This behavior was rat ionalized by the development of canals with increased water content in heterogeneous membranes.