The Synergy of Nanosilica and Zinc Diethyl Hypophosphite Influences the Flame Retardancy and Foaming Performance of Poly(Ethylene Terephthalate)

Table 2

limiting oxygen index and vertical combustion test of Pet/Zdp/nano-Sio₂ composites.

Materials	LOI/%		Dripping	UL94
Pure PET	21.6	≥30	Yes	NR
10Z	28.5	5.95	Yes	V-2
10Z/1S	29.3	5.125	Yes	V-2
10Z/3S	29.1	6.53	Yes	V-2
110Z/5S	30.9	2.72	No	V-0