Abstract
Inverse gas chromatography was used to measure activity coefficients of solvents at infinite dilution over a temperature range from 373.15K to 423.15 K for monodisperse polystyrene-hydrocarbon systems. Polystyrene has average molecular weight 2.89 ×105. Solvents include six aliphatic hydrocarbons such as cyclohexane, methylethylketone,n-hexane, carbon tetrachloride, acetonitrile and acetone and three aromatic ones as benzene, toluene andp-xylene. The measured data of activity coefficients of solvents were predicted by UNIFAC-FV model. We, also, presented a modified UNIFAC-FV model by empirically assigning to it a temperature-dependent C parameter in the free volume contribution of the model. Fitted results demonstrated that the modification of the model fitted the experiments better than the original one.
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Kim, NH., Choi, BG. & Choi, JS. Solvent activity coefficients at infinite dilution in polystyrene-hydrocarbon systems from inverse gas chromatography. Korean J. Chem. Eng. 13, 129–135 (1996). https://doi.org/10.1007/BF02705899
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DOI: https://doi.org/10.1007/BF02705899