THERMAL DEGRADATION STUDY AND DETERMINATION OF THE KINETIC PARAMETERS OF A NATURALLY AGED POLYPROPYLENE

The thermal degradation of three samples of polypropylene (PP) has been studied using thermogravimetry (TG). Two samples were naturally aged during 60 and 80 days, exposed to either to both solar radiations and rain effects, and the third was kept as a reference. Kinetic parameters related to the degradation process have been deduced with the help of the standard Arrhenius law and the results obtained compared to those of the literature.