Excess molar volumes and viscosities of binary mixtures of 2-(2-butoxyethoxy)ethanol with chloroalkanes at 298.15 K

Abstract

Excess molar volumes V m E and dynamic viscosities η of binary liquid mixtures of 2-(2-butoxyethoxy)ethanol with dichloromethane, trichloromethane, and tetrachloromethane have been measured as a function of composition at 298.15 K and atmospheric pressure. The excess molar volumes V m E are negative over the entire range of composition for the system trichloromethane +2-(2-butoxyethoxy)ethanol and change sign from positive to negative for the remaining systems, dichloromethane or tetrachloromethane +2-(2-butoxyethoxy)ethanol. The viscosity data have been analyzed by using the viscosity equations of McAllister and Heric. From the experimental results, deviations in the viscosity (lnΔ η) and excess energies of activation for viscous flow (Δ G *E) have been calculated. All the mixtures show positive values of lnΔ η and Δ G *E over the entire concentration range. The results for V m E, lnΔ η, and Δ G *E are discussed on the basis of molecular interactions between the components of the mixtures.