THE STATE OF CU2-PAA POLYMER MATRIX( IONS AND HIGHLY DISPERSED CUS IMMOBILIZED IN PVA)

Microheterogeneous water swelling polymer compositions containing high ly dispersed semiconductive component CuS have been obtained on the ba sis of PVA-PAA mixtures. Average CuS particle size range is 8-13 nm. T he formation of highly dispersed CuS phase takes place upon attraction of coordinately bonded (immobilized) CU2+ ions and sulfide ions. The interaction occurs directly in polymer matrix bulk (in situ method). A ccording to IR spectroscopy data, the state of CU2+ ions in polymer ma trix is characterized by formation of coordination centers with donor- acceptor and ionic bonds between CU2+ and carboxylic groups of PAA. St ructure characteristics of highly dispersed polymer-CuS compositions ( particle size distribution, crystallite size, specific surface, concen tration) and phase boundary intermolecular interactions type in polyme r-CuS compositions have been studied using X-ray scattering and IR spe ctroscopy methods. Such compositions possess rather high swelling (sim ilar to 400 wt%) and under hydrogel state display good mechanical prop erties (E = 0.6 MPa, sigma(b) = 2.5 MPa, epsilon = 370 %) and permeabi lity (similar to 21/m(2) . h).