1. Shanghai Key Laboratory of Advanced Polymeric Materials
2. Key Laboratory for Ultrafine Materials of Ministry of Education
3. School of Materials Science and Engineering
4. East China University of Science and Technology
5. Shanghai 200237
6. State Key Laboratory of Molecular Engineering of Polymers
7. Department of Macromolecular Science
8. Fudan University
9. Shanghai 200433
10. P. R. China