Abstract
A combination of dilute solution viscometry and Rayleigh light scattering has been used to evaluate experimentally the interaction parameters χ ij in solutions comprising tetralin (1), polystyrene (2) and 3-methyl cyclohexanol (3). The measurements were carried out at 371.5 K, where binary solutions of the polymer in 3-methyl cyclohexanol are under θ-conditions and tetralin is a thermodynamically good solvent for polystyrene. For polymer-solvent interaction, values of χ 12 = 0.40 ± 0.01 and χ 23 = 0.50 were obtained. The solvent-solvent interaction parameter χ 13 was composition dependent, having limiting values of 0.52 and 0.73 at X 1 = 0 and X 1 = 1, respectively, where X 1 is the mol fraction of liquid 1 in binary mixtures of liquids (1) and (3).
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