Abstract
We report turbidity measurements for a series of solutions of polystyrene in methylcyclohexane with varying polymer molecular weights. The obtained correlation length ξ and the osmotic compressibility χ shows power law dependence on both the reduced temperature t (=|T−Tc|/Tc) and the molecular weights Mw of the polymers. We find that the relations ξ0(1−φc)0.85∝Mw0.18, and χ0(1−φc)−1.20∝Mw−0.09 proposed by An, Jiang, Chen, and Shen [Chem. Phys. Lett. 282, 403 (1998)] can be used to describe the present experimental results. Moreover, these relations appear to be better suited than a simple scaling for extracting the Mw-exponents. The exponents so obtained are found to be in excellent agreement with theoretical predictions.
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