Burning Characteristics of Ammonium-Nitrate-Based Composite Propellants with a Hydroxyl-Terminated Polybutadiene\\/Polytetrahydrofuran Blend Binder
摘要：
Ammonium-nitrate-(AN-) based composite propellants prepared with a hydroxyl-terminated polybutadiene (HTPB)\/polytetrahydrofuran (PTHF) blend binder have unique thermal decomposition characteristics. In this study, the burning characteristics of AN\/HTPB\/PTHF propellants are investigated. The specific impulse and adiabatic flame temperature of an AN-based propellant theoretically increases with an increase in the proportion of PTHF in the HTPB\/PTHF blend. With an AN\/HTPB propellant, a solid residue is left on the burning surface of the propellant, and the shape of this residue is similar to that of the propellant. On the other hand, an AN\/HTPB\/PTHF propellant does not leave a solid residue. The burning rates of the AN\/HTPB\/PTHF propellant are not markedly different from those of the AN\/HTPB propellant because some of the liquefied HTPB\/PTHF binder cover the burning surface and impede decomposition and combustion. The burning rates of an AN\/HTPB\/PTHF propellant with a burning catalyst are higher than those of an AN\/HTPB propellant supplemented with a catalyst. The beneficial effect of the blend binder on the burning characteristics is clarified upon the addition of a catalyst. The catalyst suppresses the negative influence of the liquefied binder that covers the burning surface. Thus, HTPB\/PTHF blend binders are useful in improving the performance of AN-based propellants.
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DOI：
10.1155/2012/378483
年份：
2012
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