Correlation between intermolecular interactions and excess properties of polyethylene glycol 400 + benzyl methacrylate binary mixtures at temperatures from 293.15 to 318.15 K

Abstract

In the present study, the physicochemical properties such as the excess molar volumes, excess isentropic compressibilities, excess speeds of sound, excess molar compressibilities, excess refractive indices, and partial and excess partial molar volumes/compressibilities have been evaluated from the experimentally measured data of density, speed of sound and refractive index for the binary mixtures of polyethylene glycol 400 (PEG 400) with benzyl methacrylate over entire mole fraction range at the temperatures, T/K = (293.15–318.15) and pressure, p = 101 kPa. The partial molar volume/compressibility and excess partial molar volume/compressibility at infinite dilution have also been calculated. The correlations of the excess properties were made with the Redlich-Kister polynomial equation. The observed excess functions have been used to discuss the intermolecular interactions prevailing between the components in this system. Also, some theoretical mixing rules for correlating the refractive indexes were assessed and the results were compared with experimental data.