IN-SITU CHARACTERIZATION OF CAVITATION DURING THE DEFORMATION OF SEMI-CRYSTALLINE POLYMERS

摘要

A novel testing technique is presented for the quantitative measurement of cavitation in polyethylene and talc-filled polypropylene, subjected to uniaxial tension. Both materials exhibit extensive dilatation in the plastic stage. In the case of neat polyethylene, the kinetics of cavitation is correlated with SEM observation of crazing within the stretched spherulitic microstructure. For talc-filled polypropylene, extensive cavitation makes him suitable for shock absorption.