Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

In this work, experimental relative permittivity data for the (1,4-butanediol + 1-octanol), (1,4-butanediol + 1,4-dioxane), and (1-octanol + 1,4-dioxane) binary systems were obtained at T = (298.2, 308.2, and 318.2) K and atmospheric pressure. The molecular dipole moments were determined using Guggenheim-Debye method throughout the investigated temperature range. The variations of effective dipole moment and correlation factor, g, with the mole fraction in these materials were investigated using Kirkwood-Frohlich equation. In order to obtain valuable information about heterogeneous interaction, the Kirkwood correlation factor, the Bruggeman dielectric factor, the excess permittivity, and the excess Helmholtz energy were calculated using the experimental data. In this work, various mixing rules were applied in order to predict the permittivity data of the binary systems of (1,4-butanediol or 1-octanol + 1,4-dioxane).