Interpolymer reactions involving sulfonate-containing aromatic poly(amides) and the properties and application of their products

Interpolymer reactions in binary polymer systems containing water-soluble a romatic polyamides with sulfonate groups were studied by potentiometry, tur bidimetry, and viscometry. It was demonstrated that interpolymer complexes stabilized by hydrogen and salt bonds are formed. Complexes were found to b e stable in acidic and neutral media. Films prepared from the studied compl exes are characterized by high strength parameters dependent on the nature and ratio of components and show a high selectivity in the pervaporation se paration of water-alcohol mixtures. For pervaporation membranes with a sepa ration layer based on interpolymer complexes, the separation factor (isopro panol-water mixture) varies from 1210 to 1350 over the productivity range f rom 1.48 to 1.10 kg/(m(2) h), respectively.