1. a National Engineering Research Center for Advanced Polymer Processing Technology, Zhenzhou University, Zhenzhou 450002, P. R. China
2. b National Engineering Research Center for Advanced Polymer Processing Technology, Zhenzhou University, Zhenzhou 450002, P. R. China
3. c State Key Laboratory for Mechanical Behavior of Materials, X i'anjiaotong University, Xi'an 710049, P. R. China
4. d National Engineering Research Center for Advanced Polymer Processing Technology, Zhenzhou University, Zhenzhou 450002, P. R. China