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3,5-difluoro-2,4,6-trinitroanisole: promising melt-cast insensitive explosives instead of TNT J. Energ. Mater. (IF 1.325) Pub Date : 2021-01-06 Suming Jing; Zhenming Jiang; Qingjie Jiao; Zhihua Li; Yucun Liu; Lei Yang
ABSTRACT Finding new melt-cast explosives with desired properties to replace 2,4,6-trinitrotoluene (TNT) has been intensely-pursued in recent decades. However, the contradiction among high energy, low mechanical sensitivity and low-melting makes the innovation of insensitive high-energy-density melt-cast explosives an enormous challenge, so the melt-cast explosives of comprehensive properties better
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Characterization of encapsulated energetic materials for trace explosives aids for scent (TEAS) J. Energ. Mater. (IF 1.325) Pub Date : 2021-01-04 Michelle D. Gonsalves; James L. Smith; Jimmie C. Oxley
ABSTRACT Encapsulation is proposed as a safer way of handling energetic materials. Different encapsulation methods for explosives, such as solvent evaporation, spray coating and supercritical carbon dioxide assisted encapsulation, were explored. Explosive training aids, where energetic materials, such as triacetone triperoxide (TATP), erythritol tetranitrate (ETN) and trinitrotoluene (TNT), are encapsulated
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Can green nitrocellulose-based propellants be made through the replacement of diphenylamine by the natural product curcumin? J. Energ. Mater. (IF 1.325) Pub Date : 2021-01-03 Rodrigo Leonard Barboza Rodrigues; Pedro Augusto Gomes Buitrago; Nami Lavigne Nakano; Fernando Cunha Peixoto; Maurício Ferrapontoff Lemos; Tanos Celmar Costa França; Letivan Gonçalvez Mendonça Filho
ABSTRACT This research evaluates the feasibility of replacing diphenylamine (DPA) with the natural product curcumin as a stabilizer in samples of nitrocellulose-based (NC-based) propellants. The stability analysis was performed using heat flow calorimetry, as described in STANAG-4582, as well as the most traditional stability testing protocols: the German test, Bergmann–Junk test, and the Storage test
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Evaluation of solvate and co-crystal screening methods for CL-20 containing energetic materials J. Energ. Mater. (IF 1.325) Pub Date : 2021-01-03 Clinton J. Chapman; Lori J. Groven
ABSTRACT The difficulty synthesizing new co-crystals has made the development of efficient methods for screening co-formers a high priority. Co-crystals have been realized as a new generation of materials with tuneable solubility, stability, and performance. Energetic co-formers have exceptionally weak intermolecular interactions making selection of co-crystallization method and parameters critical
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Preparation and oxidation of aluminum powders with surface alumina replaced by iron coating J. Energ. Mater. (IF 1.325) Pub Date : 2020-12-23 Rashid Ali; Fahad Ali; Aqib Zahoor; Rub Nawaz Shahid; Naeem Ul Haq Tariq; Ghulam Ali; Saad Ullah; Attaullah Shah; Hasan Bin Awais
ABSTRACT Aluminum powders are well known for excellent release of energy during oxidation upon heating. However, this release of energy becomes limited due to formation of dense oxide (Al2O3) layer on powder surface. In this study, reactivity of aluminum particles was improved by replacing oxide layer with metallic shell of iron using electroless plating technique. Three different bath compositions
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A Method for Calculating the JWL Equation of State Parameters for the Detonation Products of CL-20-Based Aluminized Explosives J. Energ. Mater. (IF 1.325) Pub Date : 2020-12-16 Xiaoxiang Mao; Yu Zheng; Fei Shen; Yinglin Wang; Xiaoming Wang; Yiming Li
ABSTRACT This work developed a method for calculating the Jones-Wilkins-Lee (JWL) equation of state (EOS) for the detonation products of aluminized explosives based on hexanitrohexaazaisowurtzitane (CL-20). On the basis of previous studies, chemical reaction equations, Hess’ law and Avogadro’s law were all incorporated in this process because of the non-ideal detonations of aluminized explosives. The
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Flammability Characterization of a Polysulfide Based Ramjet Fuel J. Energ. Mater. (IF 1.325) Pub Date : 2020-11-27 Daniel A. Jones; Robert A. Frederick
ABSTRACT This research program seeks to understand how the proportions of the fuel ingredients affect the ignition and decomposition characteristics of a novel solid ramjet fuel. The approach involves an ingredient mixture study that varies the proportions of three fuel components over a 10% range: epoxy cured polysulfide polymer, sulfur, and a perfluoropolyether. The primary objective of this work
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Linear burning rate of double base propellant containing Azidodeoxycellulose J. Energ. Mater. (IF 1.325) Pub Date : 2020-11-18 Etienne Comtois; Charles Dubois; Basil D. Favis
ABSTRACT Azidodeoxycellulose (AC) is evaluated in a closed vessel as part of a propellant formulation containing nitrocellulose (NC) and nitroglycerin (NG) as binders. It is found that the AC systematically generates greater pressure and a faster linear burning rate when compared to a formulation having a similar concentration of a mixture of cellulose and NC that is meant to replicate a comparable
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Synthesis and characterization of novel energetic plasticizers based on poly glycidyl nitrate J. Energ. Mater. (IF 1.325) Pub Date : 2020-11-11 Yadollah Bayat; Fatemeh Jozi; Tayebe Khanlari
ABSTRACT Energetic plasticizers are used in propellants to increase the energy content and improve the glass transition temperature and mechanical properties. The compatibility between polymer and plasticizer is an important criterion for obtaining the best thermomechanical properties. In this research, novel energetic plasticizers were synthesized via end-group modification of poly glycidyl nitrate
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Preparation and properties of lowest eutectic mixture MTNP/TNAZ J. Energ. Mater. (IF 1.325) Pub Date : 2020-11-07 Xiaolan Song; Yong Kou; Yi Wang; Zhipeng Cheng; Fengsheng Li
ABSTRACT In this work, DSC tests were performed on 1-methyl-3,4,5-trinitropyrazole (MTNP) and 1,3,3-trinitroazetidine (TNAZ) binary eutectic systems with different molar ratios, and we drawn the T-X and H-X phase diagrams. We get the ratio of MTNP/TNAZ eutectic system by phase diagram, and the eutectic of the two were characterized by Energy spectrum analysis(EDS), X-ray diffraction(XRD), fourier transform
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Predicting the Gurney velocity of chemical high explosives: thermochemical code calculations and studies on the detonation products isentrope J. Energ. Mater. (IF 1.325) Pub Date : 2020-10-30 Dany Frem
ABSTRACT The simplicity and versatility of the Gurney model has led to its widespread adoption for the calculation of peak fragment velocity of explosively-driven munitions such as fragmentation warheads and artillery projectiles. The Chemical Equilibrium with Applications (CEA) thermochemical code provides several relevant parameters that were found to be important for the construction of a mathematical
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Nitrogen-rich salts of 3,6-dinitramino-1,2,4,5-tetrazine: syntheses, structures, and energetic properties J. Energ. Mater. (IF 1.325) Pub Date : 2020-10-21 Haibo Li; Tianhe Zhang; Zhimin Li; Yanna Wang; Jie Ren; Tonglai Zhang
ABSTRACT Seven energetic salts of 3,6-dinitramino-1,2,4,5-tetrazine (DNAT), named as (NH4)2(DNAT) (1), (NH2NH3)2(DNAT) (2), (NH3OH)2(DNAT) (3), G2(DNAT) (4) (G = guanidine), (AG)2(DNAT) (5) (AG = aminoguanidine), (DAG)2(DNAT)·H2O (6) (DAG = diaminoguanidine) and (TAG)2(DNAT) (7) (TAG = triaminoguanidine) were synthesized and fully characterized. Molecular structures of 1, 4, 6, and 7 were confirmed
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Initial Decomposition of Condensed-Phase 1,3,5-Triamino-2,4,6-trinitrobenzene under High Temperature J. Energ. Mater. (IF 1.325) Pub Date : 2020-10-19 Ni-Na Ge; Yong Jiang; Song Wu; Jiao-Hu Huang
ABSTRACT We have performed quantum-based molecular dynamics (MD) simulations to investigate the initial chemical processes of the TATB under different temperatures. A self-consistent charge density-functional tight-binding (SCC-DFTB) method was employed.The results show that a large number of clusters (such as C12H12O8N10, C12H12O12N12, C12H12O6N9, C18H18O16N17) formed in the initial reaction process
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Core-shell structured nAl@F-x nanocomposite: preparation and their improved combustion performances J. Energ. Mater. (IF 1.325) Pub Date : 2020-10-19 Dongyu Hao; Yinghui Hu; Fang Wang; Debin Xia; Dakang Wang; Ruiqing Fan; Yulin Yang; Kaifeng Lin
ABSTRACT In this work, a novel Al2O3-free core-shell structured nAl@aluminum-perfluorooctanoate (F-x) nanocomposite has been prepared via a self-assembly approach. The Al2O3 shell was first removed by hydrofluoric acid (HF) solution, and then the perfluorooctanoic acid (PFOA) was coated on the surface of nAl by a self-assemble reaction. The thickness of the obtained F-x layer can be easily tuned by
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The nitration of 1-methyl-2,4,5-triiodoimidazole and its oxidation by-product under nitration conditions J. Energ. Mater. (IF 1.325) Pub Date : 2020-10-12 Pengbao Lian; Lizhen Chen; Jun Chen; Jingqi Wang; Jianlong Wang; Jian Chen
ABSTRACT In this paper, 1-methyl-2,4,5-triiodoimidazole (1) was nitrified with various nitrating reagents. 1-Methyl-2,4,5-triiodoimidazole mononitrate (2), 2,4-diiodo-1-methyl-5-nitroimidzole (3), 2,5-diiodo-1-methyl-4-nitroimidzole (4), 4,5-dinitro-2-iodo-1-methylimidzole (5), 2,4-dinitro-5-iodo-1-methylimidzole (6) and 2,4-dinitro-1-methylimidzole (8) were obtained as intermediate derivatives; and
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The effects of air gaps and inert layers on exploding bridgewire detonator function J. Energ. Mater. (IF 1.325) Pub Date : 2020-10-04 P J Rae; R C Rettinger
ABSTRACT Exploding bridgewire (EBW) detonators work by electrically exploding a thin conducting wire as a result of a high voltage discharge from a capacitor. The process creates a strong UV (ultraviolet) emission and a shock compaction wave into the surrounding porous explosive bed. To investigate the significance of each, the research presented here utilized air gaps, an optical window, or inert
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The influence of energy content and its outputs on the impact sensitivity of high-nitrogen energetic materials J. Energ. Mater. (IF 1.325) Pub Date : 2020-09-27 Svatopluk Zeman
On 15 high nitrogen and three polynitrated polyazaarenes (including six azido-derivatives), the paper demonstrates the relations between their impact sensitivities (Edr ) on the one hand and the volume heats (ρQmax ) or a representative of detonation pressure (ρD2 ) of their explosion or their enthalpies of formation (ΔHform ) on the other. The semi-logarithmic subrelations between the Edr and ρQmax
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Vented and sealed cookoff of powdered and pressed ε-CL-20 J. Energ. Mater. (IF 1.325) Pub Date : 2020-09-27 Michael L. Hobbs; Michael J. Kaneshige; Stephanie Coronel
We have completed a series of vented and sealed cookoff experiments of the ε-polymorph of CL-20 in our Sandia Instrumented Thermal Ignition (SITI) apparatus using both powder and pressed pellets at nominal densities of 313 ± 8 kg/m3 and 1030 ± 4 kg/m3, respectively. The boundary temperature of our aluminum confinement cylinder was ramped in 10 minutes from room temperature to a prescribed set-point
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Determination of JWL parameters from underwater explosion test of spherical explosives by continuous velocity probe J. Energ. Mater. (IF 1.325) Pub Date : 2020-09-18 Kebin Li; Xinlong Dong; Xiaojie Li; Yonggang Wang; Wei Wang
Underwater explosion test has been proven to be a simple way to measure the equation of state of detonation products. In order to further develop this technology, a new method for determining Jones-Wilkins-Lee equation of state (JWL-EOS) by underwater explosion test with spherical charge was designed based on the self-developed pressure-conducted velocity probe in this paper. First of all, we established
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Ignition and growth modeling of shock initiation using embedded particle velocity gauges in the plastic bonded explosive LX-14 J. Energ. Mater. (IF 1.325) Pub Date : 2020-09-16 Craig M. Tarver
Recently Vandersall et al. [1] reported a series of shock initiation experiments using embedded manganin pressure gauges in the plastic bonded explosive (PBX) LX-14 (95.5% HMX and 4.5% Estane by weight) plus Ignition and Growth (I & G) simulations of all the gauge records. Jones et al. [2] reported a study of LX-14 using embedded particle velocity gauges in a similar shock strength range. It is prudent
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Accelerated ageing of composite solid propellants under cyclic temperature variations J. Energ. Mater. (IF 1.325) Pub Date : 2020-09-12 Hamza Naseem; H. Murthy; P. A. Ramakrishna
A novel cyclic-thermal method is proposed for accelerated thermo-chemical ageing of composite solid propellants including the diurnal and seasonal variations in temperature, the main environmental factor. For accelerated ageing corresponding to natural ages of up to 5 years, natural variations during 24 hours were reduced to 90 to 214 minutes by increasing the mean temperature using Arrhenius relationship
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Preparation and molecular dynamics simulation of spherical β-HMX by spray drying technology J. Energ. Mater. (IF 1.325) Pub Date : 2020-09-05 Conghua Hou; Xin Zhang; Xinlei Jia; Chen Guo; Cong Xu; Mengya Liu
In this paper, the optimal temperature in an HMX spray-drying process was determined by molecular dynamics simulations and verified using experiments. Using the optimal spray-drying temperature determined by simulations, spherical β-HMX with a uniform particle size distribution was obtained by spray-drying. Performance characterization and thermal analysis of β-HMX were investigated by scanning electron
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A new polymorph of HMTD J. Energ. Mater. (IF 1.325) Pub Date : 2020-09-01 Lindsay McLennan; James L. Smith; Jimmie C. Oxley
While exploring the synthesis pathway of HMTD, an unexpected new route for preparing HMTD was found through the reaction of formaldehyde, hydrogen peroxide, and ammonium hydroxide. The recovered HMTD was characterized by Raman spectroscopy and powder x-ray diffraction and found to be a different crystal structure. This HMTD is believed to be the result of a different conformation of the HMTD, only
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A mathematical model for evaporation of explosive thin film J. Energ. Mater. (IF 1.325) Pub Date : 2020-08-19 O.B. Kudryashova; A.A. Pavlenko; S.S. Titov; A.B. Vorozhtsov
Here we develop a mathematical model for evaporation of an explosive thin film. Such an objective stems from the problem of trace explosive detection by techniques based on explosive vapor recording. In particular, we have previously devised an instrumentation system for standoff trace explosive detection by the active spectral imaging method. To determine the applicability limits of remote trace explosive
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Cathodic electrophoretic deposition and thermal properties of nano aluminum/fluoropolymer metastable intermolecular composite J. Energ. Mater. (IF 1.325) Pub Date : 2020-08-18 Pengfei He; Yajun Wang; Shihui Li; Yi Wan
One challenge in the application of traditional metastable intermolecular composite (MIC) material is that MIC particles are not compatible with micro-electro-mechanical system (MEMS) based pyrotechnic device. The preparation of MIC film material can solve such problem. In this paper, we applied electrophoretic deposition method to prepare aluminum/polyvinylidene fluoride (Al/PVDF) and aluminum/po
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The effect of the chosen distribution form on reaction probability estimates from drop-weight impact results J. Energ. Mater. (IF 1.325) Pub Date : 2020-08-04 Nicholas R. Cummock; Alex D. Casey; Steven F. Son
The consequences of choosing one distribution form in the analysis of drop-weight impact results were explored, and the importance of reporting both the L50 and the distribution spread-parameter for estimation of reaction probabilities at low-stimuli was demonstrated. The drop-weight impact results of pressed PBX9501 were reported alongside drop-weight results tendered by AFRL. Three distribution forms
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The nitration of 2,4,5-triiodoimidazole and its oxidation under nitration conditions J. Energ. Mater. (IF 1.325) Pub Date : 2020-08-04 Pengbao Lian; Jian Chen; Yuan Yuan; Lizhen Chen; Jianlong Wang
In this paper, the nitration of 2,4,5-trinitroimidazole (1) with nitric acid was reinvestigated. 2,5(4)-Diiodo-4(5)-nitroimidazole (2), 2,5(4)-dinitro-4(5)-iodoimidazole (3), 4,5-dinitro-2-iodoimidazole (11) and imidazolium 2,4,5-trinitroimidazole (12) were gave as nitration products, and ethanedioic acid (10) as oxidation by-product. All products were characterized using FT-IR, NMR and elemental analysis
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B/Metal composites’ thermochemical properties and their effect on the performance of an ammonium perchlorate propellant J. Energ. Mater. (IF 1.325) Pub Date : 2020-07-29 Long Cheng; Hongtao Yang; Muhammad Amjad Majeed; Yifan Li; Dongming Song; Yanchun Li
Mainly the purpose of this research is to increase the oxidation efficiency of boron powder as well as to accelerate the decomposition of AP by carrying out the trials of several metals with boron-based and AP-based propellants. B/Mg, B/Al, B/Ni, B/Fe and B/Mo composites are prepared by employing ball milling method. The thermal analysis of doped boron powder with Fe and Mo shows the better activity
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The oxidation reaction and sensitivity of aluminum nanopowders coated by hydroxyl-terminated polybutadiene J. Energ. Mater. (IF 1.325) Pub Date : 2020-07-15 Zi–Ying Ju; Jia–Li An; Chun–Yu Guo; Ting-Run Li; Zi-Yi Jia; Rui-Feng Wu
The aluminum nanopowder (nAl) was coated using hydroxyl-terminated polybutadiene (HTPB) as a coating agent. The morphology and structure of the coated samples (nAl/HTPB) were characterized by Transmission Electron Microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The active aluminum content of nAl and nAl/HTPB was measured by potassium permanganate titration
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The kinetics of thermal decomposition and hot-stage microscopy of selected energetic cocrystals J. Energ. Mater. (IF 1.325) Pub Date : 2020-07-14 J.T. Dean; M. Örnek; T.D. Manship; S.F. Son
With the increased interest in cocrystals, there is a need to quantify the decomposition characteristics of these new materials. The thermal decomposition of four energetic cocrystals composed of 4-amino-3,5-dinitropyrazole (ADNP)/diaminofurazan (DAF), 2,4,6-trinitrotoluene (TNT)/2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL20), 1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX)/CL20
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Isothermal decomposition kinetics and possible decomposition process of pentaerythritol tetranitrate J. Energ. Mater. (IF 1.325) Pub Date : 2020-07-09 Qiong Huang; Bo Jin; Liqiong Luo; Zhiliang Guo; Shijin Chu; Rufang Peng
The isothermal decomposition kinetics of pentaerythritol tetranitrate (PETN) was studied through a self-established isothermal thermal decomposition gas metering device. The pressure versus time curves of the gas generated by PETN decomposition under different temperature conditions were divided into two parts, showing the remarkable effect of temperature and melting point on PETN decomposition. Model-fitting
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Synergism of nanothermite and nanophosphrous compound for advanced infrared flares with superior spectral performance J. Energ. Mater. (IF 1.325) Pub Date : 2020-06-30 Hesham Tantawy; Amr A. Elmotaz; M. A. Sadek; Eslam Elsaka; Sherif Elbasuney
Hydroxyapatite (HA) is one of the most common biocompatible material with high phosphorous content (18.5 wt %). HA is thermally stable compound that requires high temperature to decompose; upon decomposition active phosphorus can offer enhanced thermal signature for effective countermeasure of infrared missiles. High reaction temperature can be accomplished via high energy density materials such as
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Initiation of shaped charge into booster devices J. Energ. Mater. (IF 1.325) Pub Date : 2020-06-17 Yi-Qing Fan; Jiong Wang; Jin-Jie Zhu
In this paper, the initiation capacity of shaped charges against booster devices is carefully examined using both experimental and simulation method. A booster device, which consists of insensitive charges, is investigated by shaped charge jet impact test. The results show that the response degree of the booster device with insensitive charge is detonation reaction. The numerical simulation results
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Preparation, characterization and molecular dynamics of novel pre-plasticized nitrocellulose composite microspheres containing burning rate catalysts J. Energ. Mater. (IF 1.325) Pub Date : 2020-06-16 Yanguang Wu; Kuan Chai; Lu Cai; Zhuangcheng Yi
In this contribution, pristine nitrocellulose (NC) and novel NC/glycidyl azide polymer (GAP) composite microspheres with uniformly dispersed burning rate catalysts, a high degree of roundness and excellent fluidity, were successfully prepared using a solution blending procedure. The burning rate catalysts had an apparent catalytic effect on the thermal decomposition of the novel composite microspheres
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Transition metal (Mn/Co/Ni/Cu) complexes based on 1-ethylimidazole and dicyandiamide: syntheses, characterizations, and catalytic effects on the thermal decomposition of ammonium perchlorate J. Energ. Mater. (IF 1.325) Pub Date : 2020-06-07 Ye Zhong; Zhimin Li; Yiqiang Xu; Guorong Lei; Jianguo Zhang; Tonglai Zhang
Four new coordination compounds were synthesized by the reactions of transition-metal inorganic salts with 1-ethylimidazole (EIMI) and sodium dicyanamide (NaDCA), and were characterized by elemental analysis, infrared spectroscopy (FT-IR), and X-ray crystal diffraction (XRD). Their molecular structures were confirmed as [Mn(EIMI)4](DCA)2 (1), [Co(EIMI)4](DCA)2 (2), [Ni(EIMI)4](DCA)2 (3), [Cu(EIMI)4](DCA)2
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Effects of content and particle size of cenospheres on the detonation characteristics of emulsion explosive J. Energ. Mater. (IF 1.325) Pub Date : 2020-06-04 Hua Fang; Yang-Fan Cheng; Chen Tao; Hong Su; Yue Gong; Yuan Chen; Zhao-Wu Shen
Cenospheres are the main component of industrial waste of fly ash and taking full advantage of them has good economic and environmental values. In this paper, cenospheres sensitized emulsion explosive was prepared by adding cenospheres into the emulsion matrix as the sensitizers. The effects of content and particle size of cenospheres on detonation performance of emulsion explosives were studied, and
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Jet formation and initiation study of double-layer shaped charge J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-25 Yi-Qing Fan; Jiong Wang; Jin-Jie Zhu
The formation and initiation behaviors of double-layer shaped charge (DLSC) are investigated. The DLSC comprised an inner metal liner, coupled with an outer metal or polymer liner. The nonlinear dynamic analysis software Autodyn-2D is used to simulate and compare different kinds of liner material combination shaped charges. The effects of the impedance of materials on DLSC deformation are discussed
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Reduced graphene oxide: a novel black body emitter for advanced infrared decoy flares J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-25 Sherif Elbasuney; Amr A. Elmotaz; M. A. Sadek; Hesham Tantawy; M. Yehia; Gharieb S. El-Sayyad
ABSTRACT Reduced graphene oxide (RGO) possesses unique thermal and optical properties. It could act as black body emitter with high-infrared emissivity. RGO could meet wide applications in advanced infrared decoy flares. In this study, RGO nano-sheets were synthesized through the reduction of GO after applying Hummers’ method using graphite powder as a precursor. The synthesized RGO owns 10 µm dimensions
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Evaluation of small-scale combustion of an insensitive high explosive formulation containing 3-nitro-1,2,4-triazol-5-one (NTO), 2,4-dinitroanisole (DNAN), and 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-25 Erick B. F. Galante; Nathalie Mai; Melissa K. Ladyman; Philip P. Gill; Tracey J. Temple; Frederic Coulon
ABSTRACT Energetic materials are often disposed by open-burning or open-detonation as it is a cost-effective and efficient means of destroying explosive material, and often minimizes the need to transport hazardous explosives to treatment facilities. This practice is often scrutinized for the negative environmental impact of the odorous and unsightly toxic gaseous emissions as well as the resulting
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The vibrational, thermodynamic and mechanical properties of four types HMX based on the first-principles study J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-19 Han Qin; Wei Zeng; Fu-Sheng Liu; Yun-Dan Gan; Bin Tang; Sheng-Hai Zhu; Qi-Jun Liu
The vibrational, thermodynamic and mechanical properties of α-, β-, δ-, and γ-HMX are investigated based on the first principle method. The calculated lattice parameters of four types HMX based on the GGA-PBE+G functional are in good agreement with the experimental values and our pervious calculated values. The phonon density of states and vibrational properties of HMX are obtained. In the lower or
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Synthesis, crystal structure and thermal behavior of magnesium 5,5′-bistetrazole-1,1′-diolate hexahydrate complex J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-18 Wang Xiaojun; Wang Na; Yang Yanpeng; Jin GuoLiang; Li Zhouting; Wang Xia; Lu Zhiyan
ABSTRACT A new energetic green burning rate catalyst, magnesium 5,5′‒bistetrazole‒1,1′‒diolate hexahydrate complex ([Mg(BTO)(H2O)6], 1) was synthesized based on 5,5′‒bistetrazole‒1,1′‒diolate dehydrate (BTO, 2) by the metathesis reaction, and it was characterized by FTIR spectroscopy, elemental analysis (EA), Scanning Electron Microscopy (SEM) and single X-ray diffraction. The thermal decomposition
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PETN spark-gap detonators J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-18 Kenneth C. Chen; Larry K. Warne
ABSTRACT The well-developed theory of Lorentz plasma that is dominated by electron–ion interactions is used to calculate the PETN arc characteristics. The spark-gap discharge current is a ramp with 10 to 25 ns rise time to peak and remaining constant subsequently. The approximate formulas for the arc channel conductivity, arc temperature, arc radius, and shock pressure from the arc are obtained from
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Preparation of agglomeration-free composite energetic microspheres taking PMMA-PVA with honeycomb structure as template via the molecular collaborative self-assembly J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-18 Xinlei Jia; Lanjuan Xu; Yingying Hu; Chao Li; Xiaoheng Geng; Haiying Guo; Xuewen Liu; Yingxin Tan; Jingyu Wang
We proposed with excitement a novel molecular co-assembly (MCSA) that can effectively overcome the agglomeration of energetic materials. Through the coordinated self-assembly of polymethyl methacrylate-polyvinyl acetate (PMMA-PVA) with honeycomb-like structure and nanoparticles, a controlled and orderly distribution of nitroamine explosive (cyclotetramethylenetetranitramine, HMX; cyclotrimethylenetrinitramine
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Simulation for the migration of nitrate ester plasticizers in different liners contacting with propellant by molecular dynamics J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-15 Zhenfei Yu; Weizhe Wang; Weishang Yao; Wei Zhang; Wuxi Xie; Yunfei Liu; Yu Zhao; Huimin Tan; Yu Chen
ABSTRACT The liquid components, such as plasticizer, in the charge of solid propellant can potentially migrate into the liner contacting with propellant gradually, causing negative effects on the energetic performance, mechanical properties, and combustion properties of the propellant, as well as its interfacial adhesion properties with the liner. The study and prediction of the migration of the liquid
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3-Nitramino-6-hydroxy-1,2,4,5-tetrazine and its alkaline earth metal salts: an effective strategy to balance energy density and safety of energetic compounds J. Energ. Mater. (IF 1.325) Pub Date : 2020-05-06 Jie Ren; Weijing Zhang; Tianhe Zhang; Yanli Yin; Lin Wang; Zhimin Li; Qingxuan Zeng; Tonglai Zhang
ABSTRACT 3-Nitramino-6-hydroxy-1,2,4,5-tetrazine (NHTZ) and its alkaline earth metal salts (Mg2+(1), Ca2+(2), Sr2+(3), Ba2+(4)) were prepared via 3,6-dinitramino-1,2,4,5-tetrazine for the first time. The electrostatic potentials and HOMO-LUMO orbitals of them were computed to better understand the electronic structure of NHTZ. Structures of the four alkaline earth metal salts were confirmed by elemental
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Measurements of reaction zone and determination of the equation of state parameters of DNAN-based melt-cast aluminized explosive J. Energ. Mater. (IF 1.325) Pub Date : 2019-10-14 Yang Yang; Zhuo-Ping Duan; Lian-Sheng Zhang; Zhen-Yu Zhang; Zhuo-Cheng Ou; Feng-Lei Huang
To investigate the detonation characteristics and the detonation wave profiles of the melt-cast aluminized explosive RBOL-2 (DNAN/HMX/aluminum/other additives), the particle velocity of the interface between the explosive and the Lithium-Fluoride (LiF) window and the free-surface velocity of the copper plate accelerated are measured by using the DISAR interferometer system. It is found that, for RBOL-2
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Thermal conductivity of energetic materials J. Energ. Mater. (IF 1.325) Pub Date : 2019-10-23 Zachary D. Lawless; Michael L. Hobbs; Michael J. Kaneshige
Thermal conductivity has been determined for a variety of energetic materials (EMs) using finite element analysis (FEA) and cookoff data from the Sandia Instrumented Thermal Ignition (SITI) experiment. Materials studied include melt-cast, pressed, and low-density explosives. The low-density explosives were either prills or powders with some experiments run at pour density (not pressed). We have compared
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Simple method to calculate explosion temperature of ideal and non-ideal energetic compounds J. Energ. Mater. (IF 1.325) Pub Date : 2019-10-21 Mohammad Hossein Keshavarz; Mohammad Jafari; Reza Ebadpour
The explosion (detonation) temperature of organic compounds containing energetic groups can be related to the study of the kinetics of chemical reactions in the reaction zone as well as the thermodynamic state of the detonation products. It can be predicted by a simple approach for ideal and less ideal energetic compounds as well as non-ideal composite explosives containing aluminum (Al) or ammonium
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Effect of different BPS concentration on the thermal decomposition and thermal stability properties of GAP curing J. Energ. Mater. (IF 1.325) Pub Date : 2019-11-25 Le Qi; Zhongliang Ma; Jinchao Han; Zhongliang Xiao
In order to study the optimal ratio of the degree of bis-propargyl-succinate (BPS) cures Glycidyl azide polymer (GAP), the thermal kinetics of BPS cured system was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG), the thermal stability and mechanical properties were studied. GAP was cured by the reaction of the azide group with BPS through a 1,3-dipolar cycloaddition
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Fuel-oxidizer mixtures: a lab and field study J. Energ. Mater. (IF 1.325) Pub Date : 2019-10-23 Ryan C. Rettinger; Matthew Porter; Jeffrey Canaria; James L. Smith; Jimmie C. Oxley
Improvised explosive may be as primitive as a fuel and oxidizer mixture; yet not all fuel-oxidizer mixtures are explosive. Predicting explosive potential from laboratory-scale tests is desirable to screen a large matrix of potential threats in varying concentrations. Herein the properties of various fuel/oxidizer mixtures were measured at small scale (2 g) with bomb calorimetry and on large scale (5
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Ammonium perchlorate-based molecular perovskite energetic materials: preparation, characterization, and thermal catalysis performance with MoS2 J. Energ. Mater. (IF 1.325) Pub Date : 2019-10-21 Xiaoxia Li; Shuangqi Hu; Xiong Cao; Lishuang Hu; Peng Deng; Zhaobian Xie
In this study, ammonium perchlorate (AP)-based molecular perovskite structural high-energetic materials (H2dabco)[NH4(ClO4)3] (DAP) were fabricated and their catalytic performance upon the addition of MoS2 nanosheets was investigated. The DAP samples were succesfully prepared via a self-assembly reaction and their morphology and structure were characterized via scanning electron microscopy, X-ray diffractometry
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Zirconium-boron reactive composite powders prepared by arrested reactive milling J. Energ. Mater. (IF 1.325) Pub Date : 2019-10-23 Daniel Hastings; Mirko Schoenitz; Edward L. Dreizin
Zirconium-boron composite powders with the stoichiometric bulk composition corresponding to ZrB2 were prepared using high-energy milling in a shaker mill starting with elemental boron and zirconium. Milling times up to 3 hours were explored. The characterization of the prepared powders included measuring their particle size distribution, crystal structure, and assessment of particle structure and morphology
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Investigating the effect of chemical ingredient modifications on the slow cook-off violence of ammonium perchlorate solid propellants on the laboratory scale J. Energ. Mater. (IF 1.325) Pub Date : 2019-09-30 Jonathan T. Essel; Andrew P. Nelson; Laura B. Smilowitz; Bryan F. Henson; Lauren R. Merriman; David Turnbaugh; Christopher Gray; Kyle B. Shermer
ABSTRACT Rocket propellants that contain ammonium perchlorate (AP) often have a violent response during slow heating. Two laboratory tests have been developed to determine the reaction violence of these materials. The first test was the Combustion Rate Analysis of a Slowly Heated Propellant (CRASH-P) test, which used dynamic pressure sensors to quantify the violence of the reaction. The second test
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Copper (II) complexes of 1-methyl-5-aminotetrazole with different energetic anions: syntheses, crystal structures and properties J. Energ. Mater. (IF 1.325) Pub Date : 2020-04-14 Haoran Tang; Zunning Zhou; Zhimin Li; Sitong Chen; Lin Wang; Tonglai Zhang
ABSTRRACT Three energetic copper (II) complexes, [Cu(1-MAT)2(HDNBA)2](DNBA)2 (1), [Cu(1-MAT)2](PA)2 (2) and [Cu(1-MAT)4(H2O)2](ClO4)2 (3) [1-MAT: 1-methyl-5-aminotetrazole; HDNBA: 3,5-dinitrobenzoic acid; PA: picric acid] were synthesized and characterized. The X-ray single-crystal diffraction results illustrate that the structure of the coordination compounds 1, 2 and 3 belong to the P21/c, P21212
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Experiment study on the influencing factors of mechanical response of HMX-based PBXs in the high-g deceleration environments J. Energ. Mater. (IF 1.325) Pub Date : 2020-04-13 Wenzheng Xu; Xin Liang; Hao Li; Jie Deng; Fengwei Guo; Yuexin Li; Tianlun Yan; Jingyu Wang
ABSTRACT An impact test method was designed to study the mechanical behaviors of explosive charges in deceleration environments. With this method, the deformation and density variation of explosive charges in various deceleration environments can be obtained by changing the decelerations. The deceleration can be precisely changed without changing the strength of target and the speed of projectile.
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Physical characterization of Bis(2,2-dinitropropyl) acetal and Bis(2,2-dinitropropyl) formal J. Energ. Mater. (IF 1.325) Pub Date : 2020-03-16 Alexander Edgar; Justine Yang; Manuel Chavez; Michelle Yang; Dali Yang
ABSTRACT Bis(2,2-dinitropropyl) acetal (BDNPA) and bis(2,2-dinitropropyl) formal (BDNPF) are two commonly used energetic plasticizers in explosive and propellant composites. However, some of their physical properties are rather scattered and inconsistent in the open literature. For example, there are at least two widely different values, 14.5ºC and −15ºC, for the melting point of eutectic BDNPA/F with
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Novel high-energy ionic molecules deriving from new monovalent and divalent 4-oxyl-3,5-dinitropyrazolate moieties J. Energ. Mater. (IF 1.325) Pub Date : 2020-03-14 Bo Wu; Huiying Du; Ping Hu; Zhanyu Gao; Ruikai Liu; Chonghua Pei
ABSTRACT In recent years, the exploration of a practical strategy for novel energetic molecules with high energy and low sensitivity is very desirable but highly challenging. Novel ionic energetic molecules have attracted much attention in this area due to their prominent advantages including low sensitivities, high thermal stability, and excellent energy performances. Herein, five different ionic
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Isothermal thermal decomposition of the HMX-based PBX explosive JOL-1 J. Energ. Mater. (IF 1.325) Pub Date : 2020-03-10 Qiong Huang; Xuwang Liu; Yiyi Xiao; Liqiong Luo; Guan Luo; Bo Jin; Rufang Peng; Shijin Chu
ABSTRACT Isothermal thermal decomposition method was used to study the thermal behavior of the HMX-based PBX explosive JOL-1. The gas pressure versus time curves of the isothermal decomposition of JOL-1 were obtained within the temperature range of 90°C to 130°C. Kinetic parameters such as activation energy and frequency factor for the thermal decomposition of JOL-1 were obtained using the Arrhenius
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Effect of additives on the interface binding strength of DNAN/HMX melt-cast explosives J. Energ. Mater. (IF 1.325) Pub Date : 2020-02-26 Jun-jiong Meng; Yi-ming Luo; Guo-tao Niu; Hong-xing Wang; Fei Yang
ABSTRACT To improve the mechanical property of 2, 4-dinitroanisole (DNAN)/1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) melt-cast explosives, the effects of additives, N-methyl-4-nitroaniline(MNA), polyethylene glycol sorbitanmonostearate-60 (Tween60), and cellulose acetate butyrate (CAB) on the binding energy and mechanical properties were simulated by molecular dynamics. Moreover, to verify the accuracy
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Compatibility study of NaN5 with traditional energetic materials and HTPB propellant components J. Energ. Mater. (IF 1.325) Pub Date : 2020-02-26 Yu-Yang Yao; Xin –Li Zhou; Qiu-Han Lin; Ming Lu
ABSTRACT Nitrogen-rich and poly-nitrogen energetic materials have the advantages of high density, high formation enthalpy, and environmentally friendly as new energetic materials. Among them, cyclo-N5 − is one of the most representative ionic nitrogen compounds. However, at present, the studies are mainly in the field of synthesis. This study mainly explores the compatibility of NaN5 with traditional
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