A model for rubber degradation under ultrasonic treatment:part II:rupture of rubber network and comparison with experiments

摘要

A simple theoretical model of network degradation around ultrasonically pulsating cavities is considered.The model is based on the concept of overstressed chains and provides a simple tool to estimate a number of chains which should be involved in mechanochemical degradation at a given amplitude of ultrasonic pulsation.High amplitude cavitation with no collapse-like effects is demonstrated to result in significant reduction of the rubber crosslink density.This model also predicts considerable effects of rubber degradation on elastic properties of rubber around a pulsating cavity including certain irreversible effects and residual deformations.