ABSORPTION AND VELOCITY OF ULTRASOUND IN BINARY-SOLUTIONS OF POLY (SODIUM 4-STYRENE-SULFONATE) AND WATER

The absorption and velocity of ultrasound at 21 MHZ and the shear visc osity were water solutions of poly (sodium 4-styrenesulfonate) as a fu nction of concentration and temperature. The molecular weight of the p olymer is 70 000. The concentrations used were 1%, 5%, and 9% by weigh t, and the temperatures were 25, 30, 35, 40, and 45-degrees-C. The abs orption or alpha/f2 decreases almost linearly with increasing temperat ure at a given concentration and increases with concentration at a giv en temperature. The velocity is a linearly increasing function of the temperature and also increases with concentration at a given temperatu re. In addition, the shear viscosity decreases linearly with temperatu re and increases with concentration.