مقایسه خواص پیشرانه‌های جامد مرکب بر پایه HTPB و NHTPB/HTPB
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Abstract:
Hydroxyl terminated polybutadiene (HTPB) is the most commonly used binder in composite solid propellants. However, due to its non-energetic character, in practice it is just a dead weight; Therefore, replacing HTPB with an energetic polymer is essential. In this research, nitrated hydroxyl terminated polybutadiene resin (NHTPB) with 12.2% nitration rate, in combination with HTPB resin was used as binder. Thus, the HTPB propellant base formulation (HB) was prepared as a reference sample and in terms of physical-mechanical properties, burning rate and sensitivity were compared with two other cured formulations: the propellant formulation with binder ratio of 5% NHTPB to 95% HTPB (NH5) and the other with binder ratio of 10% NHTPB to 90% HTPB (NH 10). The results showed that, with increasing NHTPB to HTPB ratio from 5% to 10%, Young's modulus, burning rate, impact and friction sensitivities were increased in comparison to reference propellant, and the cross-linking density, hardness, and tension were decreased.
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Journal title
volume 13 issue 3
pages 153- 161
publication date 2018-09
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