VISCOSITY AND DENSITY OF BINARY-LIQUID MIXTURES OF TRI-N-BUTYL PHOSPHATE PLUS BENZENE, PLUS CARBON-TETRACHLORIDE, PLUS ISOBUTYL METHYL KETONE AND PLUS ACETYLACETONE AT 25-DEGREES-C, 30-DEGREES-C, 35-DEGREES-C,40-DEGREES-C AND 45-DEGREES-C

Viscosities and densities of four binary mixtures tri-n-butyl phosphat e+benzene, +carbon tetrachloride, +isobutyl methyl ketone and +acetyla cetone have been measured at 25, 30, 40 and 45-degrees-C at six mole f ractions of each mixture. From the experimental data excess viscositie s DELTAln eta, excess Gibbs energies of activation DELTAGE of flow, e xcess entropies of activation DELTASE of flow, and excess molar volum e V(E) have been calculated. The molecular interactions in these mixtu res are explained considering relative magnitude of these parameters.