Molecular Interaction in Binary Mixtures of Tri-N-Butyl Phosphate (TBP) and Aliphatic Alcohols-Effect of Free Volume and Internal Pressure

Abstract

Abstract The ultrasonic velocity, density and viscosity in binary mixtures of TBP with a number of aliphatic primary alcohols viz. methanol, ethanol, 1-hexanol, 1-heptanol, 1-octanol and 1-decanol have been measured at frequency 3 MHz and at temperature 303.16 K. The data are used to compute excess internal pressure and excess enthalpy in these mixtures. The results corroborate the findings of these authors from dielectric studies that the interaction is maximum in 1 heptanol-TBP system and microheterogeneous β-clusters with antiparaliel orientation of dissimilar molecules predominate in it. Key Words: Ultrasonic velocityfree volumeexcess enthalpy.