INVESTIGATION ON MOLECULAR INTERACTION IN BINARY-LIQUID MIXTURES - TRI-N-BUTYL PHOSPHATE WITH BOTH POLAR AND NONPOLAR LIQUIDS USING VISCOSITY AND ULTRASONIC PARAMETERS

Ultrasonic velocity and viscosity measurements, namely of TBP + methan ol, TBP + ethanol, TBP + benzene, and TBP + CCl4 have been used to stu dy molecular interaction at 303 K. Grunberg-Nissan parameter (d), exce ss Gibbs energy (G(E)) intermolecular free length (L(f)), acoustic imp edance (Z), isentropic compressibility (beta), molar sound velocity (U -m), and available volume (V-a) have been calculated from these data. The excess parameters for the factors beta, Z, and V-a are also evalua ted. TBP-methanol and TBP-ethanol interaction leads to the formation o f clusters of dissimilar molecules.