Densities, speeds of sound, refractive indices, excess and partial molar properties of polyethylene glycol 200 + methyl acrylate or ethyl acrylate or n-butyl acrylate binary mixtures at temperatures from 293.15 to 318.15 K

Abstract

The densities, ρ, speeds of sound, u and refractive indices, nD of binary mixtures of polyethylene glycol 200 with methyl acrylate, ethyl acrylate, n-butyl acrylate, including those of pure liquids, over the entire composition range were measured at temperatures (293.15, 298.15, 303.15, 308.15, 313.15 and 318.15) K and atmospheric pressure. Using the experimental data, the excess molar volume, VmE, excess molar isentropic compressibility, Ks, mE, excess speed of sound, uE, deviations in refractive index, ΔϕnD, deviations in molar refraction, ΔRM have been calculated. The partial molar volumes and compressibilities, excess partial molar volumes and compressibilities over the whole composition range, and at infinite dilution have also been calculated. The excess properties were correlated by the Redlich–Kister polynomial equation. The variations of these parameters with composition and temperature are discussed in terms of intermolecular interactions in these mixtures. Moreover, the values of ultrasonic speeds for these mixtures were also calculated by using scaled particle theory and the results are compared with the experimentally measured values.