EXCESS VOLUMES OF BINARY-MIXTURES OF TRIETHYLAMINE AND TRIBUTYLAMINE WITH ALKANES AND ALKYLAMINES AT 298.15-K, 303.15-K AND 313.15-K

Excess volumes (V(E)) and their temperature dependence (dV(E)/dT) have been investigated from density measurements, using a vibrating densitometer DMA 60/602, for binary mixtures of triethylamine and tributylamine with hexane, octane, iso-octane (2,2,4-trimethylpentane), propylamine, butylamine, hexylamine and octylamine, and of tributylamine with decylamine and dodecylamine. Thermal expansion coefficients-alpha and excess thermal expansion coefficients-alpha(E) were evaluated from the results. The Prigogine-Flory-Patterson theory has been applied to estimate interaction, free volume and internal pressure contributions to V(E) and to estimate dV(E)/dT for the mixtures.