Synergistic flame retardant effect of ammonium polyphosphate/melamine cyanurate/aluminum hypophosphite in natural rubber. - He, Chunjiang; Ji, Yuan; Gao, Ming; Wang, Wei; Pei, Dingfeng; Chen, Chuanzhi; Qu, Meng; Sun, Guanghe (Journal of Thermal Analysis & Calorimetry, 2025)