1. State Key Laboratory of Polymer Materials and Engineering of China, Polymer Research Institute, Sichuan University Chengdu 610065, P. R. China
2. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China
3. College of Chemistry & Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, P. R. China
4. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China
5. State Key Laboratory of Polymer Materials and Engineering of China, Polymer Research Institute, Sichuan University, Chengdu 610065, P. R. China