1. Center
for Degradable and Flame-Retardant Polymeric Materials, College of
Chemistry, National Engineering Laboratory of Eco-Friendly Polymeric
Materials—Sichuan, Sichuan University, Chengdu 610064, China
2. School
of Science, Xihua University, Chengdu, Sichuan 610039, China
3. Institute
of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China