Journal of Pure and Applied Ultrasonics

V. K. Syal ¹, Anita Chauhan ¹, Suvarcha Chauhan ¹

Affiliations
1 Deptt. of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171005, IN

Abstract

Ultrasonic velocity, viscosity and density studies on solutions of PEG's of molecular weights (8,000-11,000) and (20,000) have been carried out in water (H₂0) and its binary mixtures with Acetonitrile (AN) at 25°C. From the velocity, density and viscosity data values, various acoustical parameters namely, specific acoustic impedance (Z), adiabatic compressibilty (β), intermolecular free length (L_f), relative association (R.A.), molar sound velocity (R), Wada's constant (W), solvation number (S_n) apparent molar adiabatic compressibilty (∅_ks), viscous relaxation time (t), internal pressure (π) and free volume (V_f) have been calculated. All these parameters have been discussed separately to throw light on the polymer-polymer and polymer-solvent interactions.

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