Abstract
A study of the ternary polymer systems dimethyl formamide-ethyl acetate-PS, chloroform-1,4 dioxane-PS and cyclohexane-benzene-PS was carried out by classical light scattering. Through the concept of a complex between polymer and sorbed solvent a qualitative agreement has been found between the composition light scattering and the total sorption. For the system cyclohexane-benzene-PS, it was shown that a strong and specific interaction between polymer and nonpreferentially adsorbed solvent can overcompensate the effect of the binary solvent interaction parameter χ 12. It seems, that not only the intrinsic viscosity and the coil radius of gyration but also the concentration fluctuations (or fluctuations in the structure of the polymer complex) may serve as a description of the linear expansion of the polymer coil. © 1997 Elsevier Science Ltd.
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