Ultrasonic Investigation of Molecular Interactions in Polymethylmethacrylate-Toluene Binary Liquid Mixture

Abstract

Understanding molecular interactions in liquid mixtures is crucial for various industrial and scientific
applications. In this study, ultrasonic technology was employed to investigate the nature and power of molecular
interactions in a binary liquid mixture of polymethylmethacrylate (PMMA) and toluene at two different temperatures
(308.15K and 298.15K) using a 2 MHz frequency. Acoustical characteristics including adiabatic compressibility ( βad),
intermolecular free length (Lf), acoustic impedance (ƶ), relaxation time (τ), free volume (Vf), and surface tension (S) were
evaluated based on measured values of density (ρ), ultrasonic velocity (u), viscosity (ɳ), and specific conductance. The
results revealed significant variations in these parameters with temperature, indicating temperature-dependent molecular
interactions. The calculated specific conductance provided additional insights into the conductivity of the liquid mixture.
Overall, this study elucidates the complex molecular interactions in the PMMA -toluene binary system, providing valuable
information for understanding its behavior and potential applications in various fields.