1. College of Polymer Materials Science and Engineering, Sichuan University, Chengdu 610064, P.R. China
2. Shaanxi Engineering Research Center of Special Sealing Technology, Xi’an Aerospace propulsion Institute, Xi’an 710100, P.R. China
3. Institute of Materials Science and Technology, Analysis and Testing Center, Sichuan University, Chengdu 610064, P.R. China
4. State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P.R. China