مشخصات پژوهش

In this study, the kinetic analysis of degradation of some different polymers in nitrogen medium has been studied using Kissinger method and the results have been compared with each other. Also, the degradation activation energy of these polymers was determined using the Iso-conversion method [1]. In this research, kinetic models related to different degradation mechanisms have been used. Thermal gravimetric method has been used for thermal degradation studies [2]. Experiments are usually performed under non-isothermal conditions. The activation energy was determined by using the reaction mechanism fitting method [3]. There was a relationship between degradation rate and activation energy, wherein quick degradation rate income low quantity of activation energy. The kinetic model determines the kinetic parameters, in the conversion range. It was concluded that the model-free methods, could be used for determining the dependency of activation energy on conversion. Also the most degradation reactions are not simple one-step processes and consist of multiple steps during degradation process.