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Preliminary results of an investigation into the use of polymeric binders in pyrotechnics (PBP)
Pyrotechnic compositions are often compacted to impart cohesion to the material. Although greatly increasing the structural strength, it can lead to a brittle pellet, which may suffer from loss of integrity when handled or deployed. In an effort to improve the resilience of compacted pyrotechnic compositions and increase their safety properties, an investigation was commenced into the use of thermosetting resins as binders for pyrotechnic compositions. The pyrotechnic formulation, a potassium perchlorate and potassium benzoate whistle composition, was kept simple for the initial studies, yet relevant to commercially available products. A series of tests were conducted on the stability and physical properties of this composition when it was mixed with either an inert binder (HTPB (hydroxy-terminated polybutadiene)) or an energetic binder (PolyGLYN (polyglycidyl nitrate)). The results presented show a promising trend in the use of these binders with some compaction still required to maximise the solids loading and remove porosities. The HTPB binder seemed to impart improved safety properties and could incorporate a higher solids loading than the PolyGLYN. Further studies will aim to look at pyrotechnic burning properties, the scaling-up of sample size and the increase in pellet size.
Preliminary results of an investigation into the use of polymeric binders in pyrotechnics (PBP)
Pyrotechnic compositions are often compacted to impart cohesion to the material. Although greatly increasing the structural strength, it can lead to a brittle pellet, which may suffer from loss of integrity when handled or deployed. In an effort to improve the resilience of compacted pyrotechnic compositions and increase their safety properties, an investigation was commenced into the use of thermosetting resins as binders for pyrotechnic compositions. The pyrotechnic formulation, a potassium perchlorate and potassium benzoate whistle composition, was kept simple for the initial studies, yet relevant to commercially available products. A series of tests were conducted on the stability and physical properties of this composition when it was mixed with either an inert binder (HTPB (hydroxy-terminated polybutadiene)) or an energetic binder (PolyGLYN (polyglycidyl nitrate)). The results presented show a promising trend in the use of these binders with some compaction still required to maximise the solids loading and remove porosities. The HTPB binder seemed to impart improved safety properties and could incorporate a higher solids loading than the PolyGLYN. Further studies will aim to look at pyrotechnic burning properties, the scaling-up of sample size and the increase in pellet size.
Preliminary results of an investigation into the use of polymeric binders in pyrotechnics (PBP)
Morgan, M.G. (Autor:in) / Pietrobon, R.A. (Autor:in) / Stringer, M.B. (Autor:in) / Provatas, A. (Autor:in)
International Pyrotechnics Seminar, 35 ; 113-120
2008
8 Seiten, 2 Bilder, 4 Tabellen, 12 Quellen
Aufsatz (Konferenz)
Englisch
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