Abstract

In the present paper the ultrasonic velocity (v), density (ρ) and viscosity (η) have been measured for the solutions
of polyvinyl acetate of average molecular weight 45000 approx. in acetic acid at concentration range 0.50% to
2.00% and in temperature range 35oC to 55oC respectively. Ultrasonic velocity has been measured using variable
path ultrasonic interferometer at 1MHz frequency. Using above mentioned values of ultrasonic velocity, density
and viscosity, various acoustical parameters like adiabatic compressibility, acoustic impedance, relaxation time
and ultrasonic attenuation have been computed. The variation of adiabatic compressibility (β), acoustic impedance
(Z), relaxation time ( ?) and ultrasonic attenuation (α/f2) with concentration and temperature have been studied.
Acoustical parameters provide important information in understanding the solute-solvent interaction in a polymer
solution.

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