Ultrasonic Velocity and Absorption Study of Binary Mixtures of Methanol With Acrylonitrile by Interferometric Method at Different Frequencies

Ultrasonic velocity and absorption measurement provides qualitative information regarding the nature and strength of interaction in the liquid mixtures. These studies are important because of their extensive use in the engineering, process industries, textile industries, pharmaceutical industries, nuclear energy industries. A growing specialty application for acrylonitrile is in the manufacture of carbon fibers. These are produced by pyrolysis of oriented poly acrylonitrile fibers and are used to reinforce composites for high-performance applications in the aircraft, defense and aerospace industries. Present paper reports the ultrasonic velocity (u), absorption (α), density (ρ), and viscosity (η), which has been measured at different frequencies (1 MHz to 10 MHz) in the binary mixtures of methanol with acrylonitrile over the entire range of composition at temperature 303 K. Van der Waal’s constant (b), adiabatic compressibility (β), acoustic impedance (Z), molar volume (V), relaxation time (τ), Wada constant (W), free length (L_f), isothermal compressibility (β_i), etc have been calculated. The result has been used to discuss the nature and strength of molecular intermolecular interactions in the system. These variations depend on structural changes due to intermolecular interactions in short regions around the molecules.