Thermal Degradation of Poly (vinyl chloride)-Stabilization Effect of Dichlorotin Dioxine

摘要

Thermal degradation of polyvinyl chloride(PVC) and the effect of dichlorotin dioxine (DCTD) on this process have been investigated using dehydrochlorination (DHCl) and thermogravimetric techniques.A significant decrease in the rate of degradation was ob-served when PVC was mixed with a small ammount which was maximum with 0.25 pph of DCTD and thermal decomposition temperature with DCTD was found to be higher than that of pure PVC.The value of apparent activation energy of the dehydrochlorination process has been calculated and a suitable mechanism for the stabilizing action of DCTD on PVC has been purposed.