ADSORPTION OF POLY-N-ETHYL-4-VINYLPYRIDINIUM BROMIDE ON THE SURFACE OF CARBOXYLATED LATEX-PARTICLES - COMPOSITION AND STRUCTURE OF INTERFACIAL COMPLEX

Interaction between poly-N-ethyl-4-vinylpyridinium bromide and polysty rene latex particles, the surface elf which is covered with methacryli c acid-polystyrene copolymer, was studied. The polycation adsorption o il the particle surface was found to be a cooperative process which is accompanied by interface interpolyelectrolyte complex: formation and neutralization of the surface charge. In the adsorbed macromolecules, about 75% of the polycation units form ionic contacts with negatively charged groups of the lates surface, In the presence of the excess pol ycation, tile surface charge become positive, which results in termina tion of the polycation adsorption. (C) 1996 Academic Press, Inc.