Novel Mathematical Model for Kinetic of Weight Loss of Plastic Under Isothermal Conditions.

摘要: Behaviour pattern of degradation of plastic material is very important in industrial applications. Activation energy is hindering factor in the degradation process of plastic materials. This is the very important in the selecting the plastic materials. In this study objective is activation energy could be predicted as the function of temperature and time. Experiment results of heated polypropylene plastic pieces (3× 15cm) for 0-8 hours have presented the effect of isothermal temperature. In this study the average weight loss range were 0.3–0.4% at end of 8 hours at 80,100,120,140 C temperature. In this generated model combination of arrahenious model new models. Order of n could be calculated using experimental data and using created model. Finally activation energy was expressed by the temperature and time parameters. Generated new model related to prediction of activation energy in the polypropylene plastic. Keywards: Weight loss, polypropylene, Activation Energy