Research Article
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 |
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