1. Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
2. University of Chinese Academy of Sciences; 19A Yuquan Road Beijing 100049 P. R. China
3. School of Materials Science and Engineering; Changchun University of Science and Technology; Changchun 130022 P. R. China