Notes on the use of the vacuum stability test in the study of initiation reactivity of attractive cyclic nitramines in the C4 matrix

Zeman, Svatopluk; Elbeih, Ahmed; Yan, Qi‐Long

doi:10.1007/s10973-012-2710-y

Cited by 42 publications

(32 citation statements)

References 14 publications

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“…The problem becomes much more complicated for PBXs, due to the addition of binder and other chemicals to the energetic compound. Even very small amounts of binder may have a significant effect and may control the mechanism of thermal decomposition of PBXs [19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Thermal Behavior and Decomposition Kinetics of RDX and RDX/HTPB Composition Using Various Techniques and Methods

Abd‐Elghany

Elbeih

Saeed

2016

Cent. Eur. J. Energ. Mater.

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Abstract:In this paper, the thermal behavior and decomposition kinetics of trinitrohexahydrotriazine (RDX) and its polymer bonded explosive (PBX) containing a hydroxyl-terminated polybutadiene (HTPB) based polyurethane binder in the ratio 80% RDX/ 20% HTPB were investigated using various experimental techniques and analytical methods. The HTPB polyurethane matrix contains other additives and was cured using hexamethylene diisocyanate (HMDI). Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC), Vacuum Stability Test (VST) and Ignition Delay Techniques were applied both isothermally and non-isothermally. The kinetic parameters were determined using both the isoconversional (model free) and the model-fitting methods. For comparison, Advanced Kinetics and Technology Solution (AKTS) software was also used. It was found that the addition of an HTPB-based polyurethane matrix to pure RDX decreased its decomposition temperature. It was also found that RDX/ HTPB has a lower activation energy than pure RDX. The polyurethane matrix had a significant effect on the decomposition mechanism of RDX resulting in different reaction models. It was concluded that the activation energies obtained using the Ozawa, Flynn, and Wall (OFW) and Kissinger-Akahira-Sunose (KAS) methods were very close to the results obtained via the AKTS software lying in the range 218.3-220.2 kJ·mol −1. The VST technique yielded kinetic parameters close to those obtained using TG/DTG. On the other hand, the Ignition Delay Technique yielded different and inconsistent kinetic parameters.

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Section: Introductionmentioning

confidence: 99%

Thermal Behavior and Decomposition Kinetics of RDX and RDX/HTPB Composition Using Various Techniques and Methods

Abd‐Elghany

Elbeih

Saeed

2016

Cent. Eur. J. Energ. Mater.

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“…The measurement procedures have previously been reported. 23,25,45,46 The amount of sample used for a measurement was 2 g. The duration of the test was 40 hours. The temperature for the isothermal measurements was chosen to be 120 C. Samples in evacuated glass test tubes were placed into the heating block and heated to the desired temperature.…”

Section: Vacuum Stability Testmentioning

confidence: 99%

“…In addition, a thermoanalytical study of these PBXs was conducted by Yan et al [17][18][19] The penetration performance of the advanced nitramines has been studied, [20][21][22] while different relationships have been presented and discussed by Zeman et al [23][24][25][26] based on the reactivity and sensitivity of the studied PBXs. BCHMX as part of a low sensitivity composition was studied by Hussein et al [27][28][29] From the previously mentioned research, it was concluded that the polymeric matrices have a signicant inuence on the different explosive properties of the studied PBXs.…”

Section: Introductionmentioning

confidence: 99%

The effect of glycidyl azide polymer on the stability and explosive properties of different interesting nitramines

2018

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“…Several studies have investigated the effects of explosive type [4,5], explosive particle size [6][7][8], binder system [9][10][11][12], and their physical or/ and chemical compatibility [13,14] on the energetic performance of plastic bonded explosives. Plastic bonded explosives (PBXs) containing ε-HNIW (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane, ε-CL-20) have been intensively investigated, since it has an excellent explosive performance [15,16], high energy density, and good thermal stability [13].…”

Section: Introductionmentioning

confidence: 99%

“…Plastic bonded explosives (PBXs) containing ε-HNIW (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane, ε-CL-20) have been intensively investigated, since it has an excellent explosive performance [15,16], high energy density, and good thermal stability [13]. PBX compositions based on octahydro-l,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX), and ε-HNIW tend to be significantly more expensive than conventional ones based on hexahydro-l,3,5-trinitro-1,3,5-triazine (RDX).…”

Section: Introductionmentioning

confidence: 99%

Application of BCHMX in Shaped Charges against RHA Targets Compared to Different Nitramine Explosives

Elbeih¹,

Elshenawy²,

Zeman³

et al. 2018

Cent. Eur. J. Energ. Mater.

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Abstract:In this work, a new bicyclic nitramine, cis-1, 3,4,6-tetranitrooctahydroimidazo-[4,5-d]imidazole (bicyclo-HMX or BCHMX), has been tested for its performance as a shaped charge explosive filler in comparison with three other interesting cyclic nitramines. Four shaped charges were prepared using different nitramine-based plastic bonded explosives (PBXs), and their performance was measured experimentally in terms of the penetration depth into laminated rolled homogeneous armour (RHA) targets. The explosive fillers were highly pressed PBXs based on RDX, HMX, BCHMX and CL-20, bonded by Viton A binder. The Autodyn numerical hydrocode was implemented to determine the shaped charge jet's characteristics and its penetration depth. The experimental and calculated detonation characteristics of the explosives used are reported. Relationships between the detonation characteristics of the explosives and the jet characteristics were observed. The results show that CL-20 is the most powerful explosive, with the largest penetration depth into the RHA target, while BCHMX explosive has a relatively enhanced penetration depth with respect to RDX explosive. The results of the Autodyn code calculations are consistent with the experimental measurements, with a maximum difference of 6.6%.

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Notes on the use of the vacuum stability test in the study of initiation reactivity of attractive cyclic nitramines in the C4 matrix

Cited by 42 publications

References 14 publications

Thermal Behavior and Decomposition Kinetics of RDX and RDX/HTPB Composition Using Various Techniques and Methods

Thermal Behavior and Decomposition Kinetics of RDX and RDX/HTPB Composition Using Various Techniques and Methods

The effect of glycidyl azide polymer on the stability and explosive properties of different interesting nitramines

Application of BCHMX in Shaped Charges against RHA Targets Compared to Different Nitramine Explosives

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