Abstract

Ultrasonic measurements of relaxation phenomena in the 30- to 270-Mc/sec range have been obtained in 10 homogeneous linear polysiloxane liquids (commonly called silicones) and in a number of heterogeneous mixtures of them. Absorption and velocity data for both instances are presented. In the former case, an analysis is presented on the basis of single-relaxation theory. Special emphasis here is placed on the 6- and 10-atom fluids. The discussion of the results in the heterogeneous liquids is given in terms of a “dynamic viscosity.”

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