Critical Opalescence of Polystyrene in Cyclohexane

Abstract

Light scattering measurements on the system cyclohexane-polystyrene (molecular weight range 69 000 to 1 000 000) show an angular dissymmetry of critical opalescence in essential agreement with theory. The interaction range between polymer segments as calculated from the data appeared to be considerably smaller than the radius of gyration of the polymer coil. The dependence of critical temperature and concentration on the molecular weight is shown.