Correlation of viscosity of binary liquid mixtures

A new two-parameter model presented in the previous work for correlating th e viscosity of pure liquids is extended to correlate the viscosity of binar y liquid mixtures. The correlation relates this non-equilibrium property to some equilibrium properties, the volume, the internal energy of vaporizati on and their excess properties. The viscosities of 47 binary liquid mixture s, including different kinds, which having no maximum or minimum viscosity, which having one maximum or one minimum viscosity, and which having both o f one maximum and one minimum viscosities in the whole composition range, a re correlated using the model and compared with data reported in the litera ture with the overall average absolute deviation of 1.05%. Further comparis on with a good correlation, a free-volume type correlation, is also discuss ed. The results show that the new method is satisfactory. (C) 1999 Elsevier Science B.V. All rights reserved.