The thermal decomposition kinetics and pyrolysis mechanism of polyvinyl chloride(PVC) using epoxidized soybean oil(ESO) as the plasticizer(PVC/ESO) was studied in this paper.The results showed that the apparent activation energy(Ea) increased with the increase of the weight loss.The changes of Ea of PVC/ESO indicated that ESO could stabilized the PVC when the thermal loss was lower than 50%.At high temperature,a more complex cross-linking reaction might occur between the two plasticizers,leading to the high...