Comparative study between acoustical nature and molecular interactions of copolymer and terpolymer

P. S. Agrawal, M. S. Wagh and

Abstract

The copolymer has been synthesized by condensation of p-hydroxy benzoic acid and formaldehyde in 2M HCl. The terpolymer has been synthesized by condensation of p-hydroxy benzoic acid, urea and formaldehyde in 2M HCl. Density (ρs), ultrasonic velocity (Us) and viscosity (ηs) of terpolymer and copolymer have been measured in DMF at five different temperatures.The experimental data have been used to calculate the acoustical parameters namely acoustic impedance (z), adiabatic compressibility (βs), intermolecular free length (Lf). The results are discussed in the light of solute-solvent interaction and structural effects on the solvent in solution.