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Ultrasonic velocity measurements are reported for aqueous solutions of polyvinyl alcohol with different stearates such as zinc stearate and calcium stearate with plasticizer ethylene glycol at 303 K. The data obtained as a function of concentration indicate the magnitude of the contributions due to the relaxation of the backbone and of the side - chain acetyl group. A variety of the different theoretical models has been proposed to attempt to explain the way in which the factors such as frequency, intensity, solvent, temperature, nature of dissolved gas, external pressure and the molecular mass distribution influence the rate of degradation, and final molecular mass of the degraded species.

Ultrasonic Study of Molecular Association of Ternary Mixtures in Polyvinyl Alcohol, Stearates and Ethylene Glycol