Features of molecular mobility manifestations of adsorbed chains in adsorption from solutions of polymer mixtures under conditions of adsorption equilibrium

Abstract

By the NMR method, the molecular mobility was investigated of polystyrene and poly(butyl methacrylate), adsorbed from their individual solutions and from their mixtures in a common solvent under conditions of adsorption equilibrium, in dependence on the polymer concentration, content of adsorbent and temperature. The fraction of the hindered monomer units was determined, characterizing their binding by the surface and the hindrance of the molecular motions of a sequence of monomer units due to adsorption of the end unit on the surface. It was shown that the molecular mobility of the adsorbed molecules substantially depends on whether the macromolecules are adsorbed as isolated coils or as aggregates.