1. Department of Chemical and Biochemical Engineering; State Key Laboratory of Chemical Engineering; Zhejiang University; Hangzhou 310027 Zhejiang People's Republic of China
2. Shanghai 3F New Material Co., Ltd.; Shanghai 200241 China
3. Fachgebiet Technische Physik II/Polymerphysik; Institut für Physik; TU Ilmenau, 98684 Ilmenau Postfach 10 05 65 Germany