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Explosive Strenght and Impact Sensitivity of Several PBXs Based on Attractive Cyclic Nitramines
Authors: Elbeih Ahmed Ikhlas Mohamed | Jungová Marcela | Zeman Svatopluk | Vávra Pavel | Akštein Zbyněk
Year: 2012
Type of publication: článek v odborném periodiku
Name of source: Propellants Explosives Pyrotechnics
Publisher name: Wiley-VCH
Place: Weinheim
Page from-to: 329-334
Titles:
Language Name Abstract Keywords
cze Výbušná síla a pádová citlivosti několika plasty pojených trhavin na bázi atraktivních cyklických nitraminů Byly připraveny a studovány plastické trhaviny. Byly použity matrice na bázi polyizobutylenu, nitrilovém kaučuku, Vitonu A, a polydimethylsiloxanu jako pojiva a nitraminy RDX, beta-HMX, BCHMX a e-HNIW jako výbušné náplně. Pádové citlivosti, hustota, detonační rychlost, D a relativní pracovní schopnostu (RS), byly specifikovány. Plastické výbušiny BCHMX s Vitonem A nebo PIB-matrice vykazuje vyšší RS v porovnání s těmiže výbušinami s RDX a HMX. Byly studovány a diskutovány vztahy RS se pádovými citlivostmi a výrazem D2. Zvýšení výkonu je obvykle doprovázena zvýšením citlivosti výbušniny. Viton A umožňuje dosáhnout vysoké RS, ale s poměrně vysokou citlivostí příslušných trhavin, zatímco polydimethylsiloxane matice by měla snad dát plastické trhaviny s optimálními parametry RS a citlivosti. balistický moždíř; detonace; síla; náraz; plasty pojené trhaviny; BCHMX; HMX; HNIW; RDX
eng Explosive Strenght and Impact Sensitivity of Several PBXs Based on Attractive Cyclic Nitramines Plastic explosives based on different cyclic nitramines with different polymeric matrices were prepared and studied. The used polymeric matrices were fabricated on the basis of polyisobutylene (PIB), acrylonitrile-butadiene rubber (ABR), Viton A, and polydimethyl-siloxane as binders, whereas the nitramines named RDX (1,3,5-trinitroperhydro-1,3,5-triazine), beta-HMX (beta-1,3,5,7-tetranitro-1,3,5,7-tetrazocine), BCHMX (cis-1,3,4,6-tetranitrooctahydroimidazo-[4,5-d]imidazole) and e-HNIW (e-2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane) were used as explosive fillers. Commercial Semtex 10, based on pentaerythritol tetranitrate (PETN), was used for comparison. Impact sensitivity, loading density, detonation velocity, D, and relative explosive strength (RS) measured by ballistic mortar were determined. It was concluded that plastic BCHMX based on Viton A or PIB-matrix exhibits higher RS compared with PBXs based on RDX and HMX. Correlations between RS and the impact sensitivity, the D2 term and the square of the detonation velocity were studied and discussed. The results confirm the well-known fact that increasing the performance is usually accompanied by an increase in the sensitivity of the explosives. In this connection, Viton A enables achieving a high RS, but with a relatively high sensitivity of the PBXs, whereas the polydimethyl-siloxane matrix should perhaps give PBXs with optimum explosive strength and sensitivity parameters. ballistic mortar; detonation; strength, impact; PBX; BCHMX; HMX; HNIW; RDX

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