1. a Center for Degradable and Flame‐Retardant Polymeric Materials (ERCEPM‐MoE), College of Chemistry, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, China and Chemistry and Chemical Engineering Department , Mianyang Normal University , Mianyang, China
2. b Center for Degradable and Flame‐Retardant Polymeric Materials (ERCEPM‐MoE), College of Chemistry, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu, China