1. Center
for Degradable and Flame-Retardant Polymeric Materials, College of
Chemistry, State Key Laboratory of Polymer Materials Engineering,
National Engineering Laboratory of Eco-Friendly Polymeric Materials
(Sichuan), Sichuan University, Chengdu 610064, China
2. Department
of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202, United States