(MgCl2·6H2O) and aluminum chloride hexahydrate
(AlCl3·6H2O) were supplied by Damao Chemical
Reagent Factory (China). Sodium hydroxide (NaOH) and sodium carbonate
(Na2CO3) were provided by Beijing Tong Guang
Fine Chemical Co., Ltd. (China). Sodium perchlorate (NaClO4) was obtained from Sigma-Aldrich (Shanghai) Trading Co. Ltd. PVC
was prepared by Vinnolit GmbH & Co. KG, Germany. Epoxidized soybean
oil (ESO) was purchased from Nanjing Rongji Chemical Co., Ltd. Zinc
stearate ((Zn(St)2) and calcium stearate (Ca(St)2) were supplied by Transfar Chemistry. All of the reagents were of
analytical purity and were used directly.