Solubility Measurements of Benzene and Cyclohexane in Molten Polyisobutylene by the Piezoelectric-Quartz Sorption Method and Its Correlation by the Modified Dual-Sorption Model

Abstract

Solubilities of benzene in PIB at 313.2, 333.2 and 353.2 K and those of cyclohexane in PIB at 313.2 and 333.2 K were measured by the piezoelectric-quartz sorption method. The experimental data were correlated by the modified dual-sorption model, which was expressed by the overall relation of the UNIQUAC+FV equation and the Langmuir equation. Then the effect of adsorption on the experimental data was quantitatively studied and the contribution of adsorption was eliminated from the data. The corrected solubilities agreed with the literature.