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