Amelioration des proprietes thermiques, mecaniques et physiques d’un composite a base de polypropylene charge par du dioxyde de titane : role du traitement thermique et de l’epaisseur

Abstract

We studied the effects of heat treatment (quenching and annealing) on the properties of polypropylene pigmented titanium dioxide. The results showed that the process of thermal quenching at -20 ° C, is effective in improving the mechanical properties of the composite PP / TiO2. The thermal history plays an important role in the development of residual structural stresses. The level of stress varies when the quenching is performed at a temperature which corresponds to the relaxation mode of polymer. However, the annealing and cooling in the air appears to be the most effective for improving the thermal properties of the composite PP / TiO2 .A good correlation was found between the thermogravimetric and spectroscopic analysis. These show that the composite has the thermal stability and better resistance corresponds to the quenching temperature 0 ° C.