Study on Mechanical Properties and Fire Resistance of Epoxy Nanocomposite Reinforced with Environmentally Friendly Additive: Nanoclay I.30E

Table 8

Effect of ultrasonic stirring time on fire retardation of epoxy Epikote resin 240/nanoclay I.30E nanocomposite material.

No.	Sonication time (min)	wt% nanoclay I.30E	LOI (vol% O2 ± 2σ)	Combustion rate (mm/min)	UL94 HB (mm/min)
1	Neat epoxy	0	20.6	28.41	—
2	30	2	22.8	25.11	24.57
3	45	2	22.8	24.67	23.67
4	60	2	23.7	24.50	22.59
5	90	2	22.8	25.12	23.45