Densities, Viscosities, and Volumetric Properties of Binary Mixtures of 1,2-Propanediol + 1-Heptanol or 1-Hexanol and 1,2-Ethanediol + 2-Butanol or 2-Propanol at <i>T</i> = (298.15, 303.15, and 308.15) K

Abstract

Densities and viscosities for 1,2-propanediol + 1-heptanol or 1-hexanol and 1,2-ethanediol + 2-butanol or 2-propanol were measured over the whole composition range at (298.15, 303.15, and 308.15) K and at atmospheric pressure. From the experimental data, the excess molar volume, VmE, partial molar volumes, V̅m,1 and V̅m,2, and excess partial molar volumes, V̅m,1E and V̅m,2E, over the entire range of composition were calculated. Viscosity deviations, Δη, were also obtained and showed negative values for all investigated systems. These results were fitted to the Redlich−Kister polynomial equation to estimate the binary interaction parameters. The viscosity data were correlated with equations of McAllister, and calculated functions have been used to explain the intermolecular interaction between the mixing components.