1. College of Chemistry and Chemical EngineeringHenan University Kaifeng 475004 People's Republic of China
2. Engineering Research Center for NanomaterialsHenan University Kaifeng 475004 People's Republic of China
3. Yanshan BranchBeijing Research Institute of Chemical Industry, SINOPEC
4. National Engineering Research Center for Synthesis of Novel Rubber and Plastic Materials Beijing 102500 People's Republic of China