Toughness and Ductile Brittle Transition Temperature of Different Mineral Filler Reinforced TPOs Composites

Abstract

The effect of different mineral fillers (Talc, calcium carbonate, clay, mica) on the toughening behavior and ductile-brittle transition temperature (DBTT) of TPOs composites has been investigated in the paper. An attempt was made to investigate impact strength to determine the DBTT of the mineral-modified TPO composite system by employing a series of mineral fillers. Impact tests at different temperatures were carried out to detect ductile and brittle fractures. Data is then related and interpreted in terms of the basic structure-property relationship, by varying the percentage of mineral filler content in the TPO composite system. Variation of impact properties has also been correlated to the yield behavior of unmodified blends as well as mineral-modified TPO systems and DBTT of the mineral-modified blends. The data of impact & tensile tests are used to deduce model equations that are used to draw simulations for predicting the physical properties of new combined systems. Variable trends in a decrease in toughness were revealed by the results. This effect is more functional with the assimilation of talc. The viscosity of the impact modifier directly affects the crazing, shear yielding, cavitation, and dimensional stability of the composite. These factors are eventually responsible for the brittle or ductile failure of the system.