Synthesis and Application of a Novel Polyamide Charring Agent for Halogen-Free Flame Retardant Polypropylene

Table 1

LOI and UL-94 results of flame retardant PP composites.

Samples ID	Samples	LOI	UL-94	Dripping	Ignite the absorbent cotton
1	70% PP/27% IFR※	29	V-1	Yes	Yes
2	70% PP/27% IFR/1.5% PETA	31.8	V-0	No	No
3	70% PP/27% IFR/3% PETA	32.1	V-0	No	No
4	70% PP/27% IFR/4.5% PETA	32.3	V-0	No	No
5	70% PP/27% IFR/6% PETA	32	V-0	No	No

※The IFR here refers to the FR at 2.1.