Experimental investigations of light scattering are presented for two ternary systems (two chemically different polymers with a solvent): polystyrene(PS)-poly(methyl methacrylate)(PMMA)-benzene (or toluene) and PS-poly(vinyl acetate )( PVAc )-styrene. These systems show similarities with respect to the incompatibility between the two unlike polymers. Experiments are reported for mixtures with different molecular weights and for concentrations ranging from dilute solution to the onset of phase separation. Thermodynamic analysis is undertaken by evaluating the polymer-polymer interaction parameters. For both systems, the polymer-polymer interaction parameters are constant in dilute solution but increase in the semi-dilute regime. A more complete study is performed on the PS-PMMA-toluene system by analysing the angular distribution of the scattered intensity.
Посилання на статтю:
Experimental investigations of light scattering by polystyrene-poly(methyl methacrylate)-good solvent and polystyrene-poly (vinyl acetate)- good solvent / Latifa Ould-Kaddour* and Claude Strazielle // Polymer. – 1992. – Vol 33. – P. 899-908.