Ultrasonic and Viscometric Studies of Molecular Interaction in Binary Liquid Mixtures of Propylene Glycol and Dimethyl Sulphoxide at Various Temperatures

Abstract

Ultrasonic studies are extensively used in the confirmation analysis of organic molecules. The binary liquid mixtures play a major role in understanding the nature and strength of molecular interaction. The thermo physical properties such as density (ρ), viscosity (η), and velocity (U) of binary liquid mixtures of Propylene glycol with Dimethyl sulphoxide were determined experimentally over the entire composition range at 303.15K, 308.15K, and 313.15K. From the experimental data the thermo acoustic parameters such as adiabatic compressibility (βa), intermolecular free length(Lf), acoustic impedance(Z),free volume(Vf),relaxation time(τ), Gibb’s free energy(ΔG), internal pressure (πi), molar sound velocity (R), interaction parameter (ᵡ), were calculated, which are more useful to predict and confirm the molecular interaction present in the binary liquid mixtures.