1. School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P.R. China
2. Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan University of Science and Technology, Xiangtan, P.R. China
3. Daqing Petrochemical Research Institute of CNPC, Daqing, P.R. China