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

Table 1

Chemical properties of PTHF and HTPB.

Binder ingredient	PTHF	HTPB
Molecular structure	HO–(–CH2–CH2–CH2–CH2–O–)n–H	HO–(–CH2–CH=CH–CH2–)n–OH
Density (g cm^−3)	0.970–0.981	0.902
Heat of formulation (kJ mol^−1)	−219.2	−21.1