화학공학소재연구정보센터
Journal of Chemical Thermodynamics, Vol.108, 145-161, 2017
Physicochemical study of intermolecular interactions in 1,4-dioxane + aromatic hydrocarbons binary mixtures at different temperatures by using ultrasonic and viscometric methods
The speeds of sound, u and viscosities, eta of the binary mixtures of 1,4-dioxane with benzene, toluene, o-xylene, m-xylene, p-xylene, and mesitylene over the entire composition, including those of pure liquids, were measured at temperatures (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K and at atmospheric pressure. From the experimental data, the excess isentropic compressibility, K-s(E), excess speed of sound, u(E), excess molar isentropic compressibility, K-s,m(E) and deviations in viscosity, Delta eta have been calculated. The partial molar isentropic compressibilities, K-s,m(E) and (K) over bar (s,m,2), and excess partial molar isentropic compressibilities, (K) over bar (E)(s,m,1) and (K) over bar (E)(s,m,2) over the whole composition range, partial molar isentropic compressibilities, (K) over bar (degrees)(s,m,1) and (K) over bar (degrees)(s,m,2), and excess partial molar isentropic compressibilities, (K) over bar (degrees E)(s,m,1) and (K) over bar (degrees E)(s,m,2) of the components at infinite dilution have also been calculated. The results indicated the presence of weak interactions between 1,4-dioxane and aromatic hydrocarbon molecules, which follows the order: benzene > toluene > o-xylene > m-xylene > p-xylene > mesitylene. It is observed that the interactions depend on the number and position of the methyl groups in these aromatic hydrocarbons. Further, the viscosities of these binary mixtures were correlated theoretically by using various empirical and semi empirical models and the results were compared with the experimental findings. (C) 2017 Elsevier Ltd.