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

Excess molar volumes VmE 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 VmE 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 (lnΔη) and excess energies of activation for viscous flow (ΔG*E) have been calculated. All the mixtures show positive values of lnΔη and ΔG*E over the entire concentration range. The results for VmE, lnΔη, and ΔG*E are discussed on the basis of molecular interactions between the components of the mixtures.