The effect of ultrasonic intensity on degradation parameters K and y for a polystyrene in benzene sample was investigated. The results are discussed in relation to a theory previously developed for the degradation of addition polymers by ultrasonic waves. It is shown that for a constant ultrasonic frequency the experimental results can be explained by theories which assume that degradation is caused by frictional or impact forces.
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M. A. K. Mostafa (1958) studied this question.
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