1. DWI an der RWTH Aachen e.V., Institut für Technische und Makromolekulare Chemie der RWTH Aachen University, Pauwelsstr. 8, D-52056 Aachen, Germany
2. Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433, China