A study of solute and solvent of poly(vinyl chloride) using ultrasonic method

Abstract This study investigates the acoustic impedance, adiabatic compressibility, intermolecular free length, relaxation time, ultrasonic absorption and Rao's constant of binary mixtures comprising poly(vinyl chloride) and dimethylformamide at varying concentrations and temperatures. These acoustical parameters are calculated by using experimental values of density, viscosity and ultrasonic velocity. The experiments are conducted using an ultrasonic apparatus operating at a frequency of 1 MHz. Density, viscosity and ultrasonic velocity are measured at different concentrations from 0 to 1 (m/v) at different temperature ranges from 303.15 to 338.15 K. The obtained results are compared with the results presented in the literature. The comprehensive analysis of these parameters reveals intriguing insights into the nature of interactions between the solute and solvent. This study also provides a deep insight into the nature, type and strength of intermolecular and intramolecular interactions. The behaviour of the solution is discussed in terms of its acoustical parameters with concentration and temperature. © 2025 Society of Chemical Industry.