Flame-Retardant and Thermal Degradation Mechanism of Caged Phosphate Charring Agent with Melamine Pyrophosphate for Polypropylene

Table 3

Characteristic parameters of the cone calorimetric test for PP and flame retardant PP.

Samples	PHRR	AV-HRR	THR	AV-MLR	Residue at 700 s
	(kW/m^2)	(kW/m^2)	(MJ/m^2)	(g/s·m^2)	(wt%)
PP	1128.7	343.8	149.5	0.087	0
PP-1	446.5	229.3	144.5	0.055	8.3
PP-2	775.0	156.5	130.9	0.062	9.8
PP-6	244.4	208.9	133.6	0.036	23.8