Ultrasonic velocity and absorption in binary solutions of poly(ethylene oxide) with water.

Ultrasonic velocity at a frequency of 25.1 MHz was measured as a function of concentration and temperature in binary solutions of poly(ethylene oxide) and water. Absorption measurements at 21 MHz were also carried out for different concentrations and temperatures. In addition, shear viscosity was measured. The poly(ethylene oxide) has an average molecular weight of five million. Values for the velocity increase with both concentration and temperature. Both the absorption and viscosity increase with concentration, but decrease with increasing temperature. [ABSTRACT FROM AUTHOR]