Density and viscosity studies of binary mixtures of aniline plus benzene and ternary mixtures of (aniline plus benzene plus N,N-dimethylfonnamide) at 298.15, 303.15 308.15, and 313.15 K

Densities and viscosities of binary mixtures of aniline with benzene have been measured over the entire range of composition, at atmospheric pressure, and at 298.15, 303.15, 308.15, and 313.15 K. Excess molar volumes and deviations in viscosity have been calculated from the experimental data. Negative excess molar volume and negative deviations in viscosity for aniline+benzene systems are due to the interstitial accommodation of benzene molecules into aggregates of aniline. The excess molar volumes and deviations in viscosity have been fitted to the Redlich-Kister polynomial equation. Furthermore, densities and viscosities of ternary mixtures of aniline+benzene+N,N-dimethylformamide have been measured at atmospheric pressure, and at 298.15, 303.15, 308.15, and 313.15 K. From these data, excess molar volumes and viscosity deviations have been calculated. McAllister's three-body interaction model has been used to correlate the kinematic viscosities of binary and ternary liquid mixtures with mole fractions. Several empirical equations have been used to predict excess molar volumes and deviations in viscosity of ternary mixtures. (C) 2006 Elsevier B.V. All rights reserved.