Abstract
We report the effects of long-range correlation for a critical mixture of polystyrene (Mn≈392 000) in cyclohexane at small temperature distances from the phase separation temperature (T − Tp < 1.5°) by means of quasielastic light scattering. The estimated coherence length for the polystyrene–cyclohexane system from Rayleigh linewidth studies is somewhat smaller than that from angular dissymmetry measurements if we assume that the temperature dependence of the molecular-interaction range remains unchanged from static to dynamic phenomena.
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