scholarly journals Synergistic effect of flame retardants and graphitic carbon nitride on flame retardancy of polylactide composites

2020 ◽  
Vol 31 (7) ◽  
pp. 1661-1670 ◽  
Author(s):  
Xianwu Cao ◽  
Xiaoning Chi ◽  
Xueqin Deng ◽  
Tao Liu ◽  
Bin Yu ◽  
...  
2014 ◽  
Vol 224 ◽  
pp. 114-121 ◽  
Author(s):  
Shouwei Zhang ◽  
Lanping Zhao ◽  
Meiyi Zeng ◽  
Jiaxing Li ◽  
Jinzhang Xu ◽  
...  

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2323
Author(s):  
Chengxin Guo ◽  
Yongshuai Zhao ◽  
Guichen Ji ◽  
Chaosheng Wang ◽  
Zhihan Peng

The novel organic aluminum hypophosphite (ALCPA) and its hybrid (CNALCPA) with graphitic carbon nitride (g-C3N4) were successfully synthesized and applied as halogen-free flame retardants in polyamide 6 (PA6). Their structures, morphology, thermal stability, and fire properties were characterized. Results showed that both ALCPA and CNALCPA had good flame retardancy. PA6/CNALCPA composites achieved a high limited-oxygen-index (LOI) value of 38.3% and a V-0 rating for UL94 at 20 wt % loading, while PA6/ALCPA composites could reach a V-1 rating for UL94. The flame-retardant mechanism was also studied. On the one hand, the incorporation of g-C3N4 produced more gas-phase products, which indicated a gas-phase mechanism. On the other hand, g-C3N4 could catalyze the thermal degradation of ALCPA and PA6 to form a compact char layer that was evidence for a solid-phase mechanism. The tensile test of the PA6 composites also displayed good mechanical properties.


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