MICRO-DEFORMATION AND FAILURE IN POLYMERIC MATERIALS AS STUDIED BY IN-SITU TENSILE TEST IN A TRANSMISSION ELECTRON MICROSCOPE (TEM)

摘要

This report describes a method for the study of micro-deformation mechanisms of polymeric materials using tensile straining stages in transmission electron microscopy (TEM). The straining stages allow the in-situ observation of morphological changes while tensile strain is applied to a material over a temperature range -165 °C up to 500 °C. The application of this technique to different polymeric materials will be described. Micro-deformation mechanisms observed in the in-situ deformation study will be correlated to macroscopic mechanical test results. Implication for materials designing and failure mechanisms will be discussed.