Detonation Characteristics of Plastic Explosives Based on Attractive Nitramines with Polyisobutylene and Poly(methyl methacrylate) Binders

Elbeih, Ahmed; Pachmáň, Jiří; Zeman, Svatopluk; Vávra, Pavel; Trzciński, W. A.; Akštein, Zbyněk

doi:10.1080/07370652.2011.585216

Cited by 40 publications

(17 citation statements)

References 10 publications

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“…However, they are sensitive to impact and friction and their flame temperatures are relatively high. Many studies have been performed to overcome these problems without affecting the performance via mixing these nitramine explosives with some selected polymeric binders [6][7][8][9][10][11][12][13][14]. Polymeric binders can also improve the mechanical and chemical properties of explosives.…”

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 charge casings were steel with an average wall thickness of 4.5 mm. Regarding the literature, several types of plastic explosives can be used for filling the charge cases, such as the French plastic explosive named Formex P1 [17] and the American plastic explosive Composition C4 [18][19]. Selection of the plastic explosive was based on performance and sensitivity to different stimuli [20][21][22].…”

Section: Methodsmentioning

confidence: 99%

A Modified Penetration Model for Copper-Tungsten Shaped Charge Jet with Non-Uniform Density Distribution

Elshenawy

Elbeih

Li³

2016

Cent. Eur. J. Energ. Mater.

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Abstract:The penetration of a shaped charge jet with non-uniform density distribution was studied. The virtual origin model, which assumes a constant jet density, was modified to include the situation where the jet density deficit/reduction of an un-sintered copper-tungsten powder jet causes a non-uniform jet density distribution. A relation between the relative density ratio and the normalised jet velocity is proposed, based on which an analytical solution of the modified virtual origin model is obtained. The validity of the modified virtual origin model was demonstrated by its largely improved prediction in comparison with experimental and numerical results. It showed that the density reduction term reduces the penetration depth by 16.58% for an un-sintered copper-tungsten powder jet.

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“…The researchers are seeking to obtain modern explosives with high performance and high safety during handling and transportations [4][5][6]. The sensitivities of the explosives could be enhanced by controlling the crystal shapes and sizes [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…The percentage of the polymer used to coat the explosive crystals has significant effect of the performance of the prepared PBXs [13]. The thermal behavior and decomposition kinetics of PBXs are important to produce and long life PBXs [14,15]. 1,3,5-trinitro-1,3,5-triazinane (RDX) is an interesting explosive which has several applications if the field of energetic materials [2,3].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Sensitivity Measurements of Graphene Oxide-RDX Composite

et al. 2017

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Abstract. The effect of graphene oxide (GO) on the safety characteristics of 1,3,5-trinitro-1,3,5-triazinane (RDX) was studied in this work. Graphene oxide was prepared and was investigated to form a composite based on GO-RDX by solvent-antisolvent slurry technique. For comparison, different polymer bonded explosives (PBXs) based on RDX bonded by viton A, fluorel or polymethyl-methacrylate binders were studied and designed as RDX-Viton, RDX-Fluorel and RDX-PMMA respectively. Sensitivities to impact and friction of the presented samples as well as the pure RDX was measured. The ignition temperatures were determined and the activation energies were calculated by using the ignition delay method. Results of x-ray diffraction and scanning electron microscope proved that RDX crystals were coated by a thin layer of GO. The impact sensitivity of GO-RDX composite is lower than that of the other studied samples while the friction sensitivity is slightly higher. The ignition temperature of GO-RDX was lower than the other studied samples which indicates that the GO caused accumulation of the decomposition gaseous products and accelerated the decomposition process of RDX. GO is an interesting candidate material to be used for coating the explosive crystals instead of the polymeric matrices.

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Detonation Characteristics of Plastic Explosives Based on Attractive Nitramines with Polyisobutylene and Poly(methyl methacrylate) Binders

Cited by 40 publications

References 10 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

A Modified Penetration Model for Copper-Tungsten Shaped Charge Jet with Non-Uniform Density Distribution

Preparation and Sensitivity Measurements of Graphene Oxide-RDX Composite

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