1. State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences 5625 Renmin Stree Changchun 130022 P. R. China
2. Polymer Composites Engineering LaboratoryChangchun Institute of Applied ChemistryUniversity of Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China
3. University of Chinese Academy of Sciences Beijing 100049 P. R. China
4. College of Applied Chemistry and EngineeringUniversity of Science and Technology of China 96 Jinzhai Road Hefei 230026 P. R. China