Burning Characteristics of Ammonium-Nitrate-Based Composite Propellants with a Hydroxyl-Terminated Polybutadiene/Polytetrahydrofuran Blend Binder

Table 2

Binder formulations.

Binder	ξ	Mass fraction (%)
	(—)	HTPB	PTHF	IPDI
PTHF1	0	92.5	0.0	7.5
	0.2	69.7	17.4	12.8
	0.4	49.5	32.9	17.6
	0.6	31.3	46.9	21.8
	0.8	14.9	59.5	25.6
PTHF2	0	92.5	0.0	7.5
	0.2	72.5	18.1	9.4
	0.4	53.3	35.6	11.1
	0.6	34.9	52.3	12.8
	0.8	17.1	68.5	14.4
PTHF3	0	92.5	0.0	7.5
	0.2	73.8	18.5	7.7
	0.4	55.3	36.8	7.9
	0.6	36.8	55.2	8.1
	0.8	18.4	73.4	8.2