Propellants, Explosives, Pyrotechnics最新文献_第5页

Batch synthesis of 2,4,6‐trinitro‐3‐bromoanisole and its thermolysis and combustion performance 批量合成 2,4,6-三硝基-3-溴苯甲醚及其热解和燃烧性能

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-30 DOI: 10.1002/prep.202400009

Xiao‐lan Song, Yi Wang, Kang‐hui Jia, Zhi‐hong Yu, Dan Song, Chong‐wei An, Feng‐sheng Li

{"title":"Batch synthesis of 2,4,6‐trinitro‐3‐bromoanisole and its thermolysis and combustion performance","authors":"Xiao‐lan Song, Yi Wang, Kang‐hui Jia, Zhi‐hong Yu, Dan Song, Chong‐wei An, Feng‐sheng Li","doi":"10.1002/prep.202400009","DOIUrl":"https://doi.org/10.1002/prep.202400009","url":null,"abstract":"A new carrier explosive TNBA was batch synthesized by a chemical method. The prepared samples were characterized using SEM, EDS, XRD, IR, XPS, nuclear magnetic resonance, and elemental analysis techniques. The enthalpy of formation of TNBA was measured using a specialized calorimeter that is specially used in testing of explosives and powders. The thermal decomposition performance of TNBA was tested by DSC technology. Meanwhile, the combustion performance of TNBA was also tested. The results of characterizations showed that the prepared sample was indeed TNBA. The enthalpy of formation of TNBA was determined as ΔHf,TNBA=+48.5 kJ/mol. At a heating rate of 20 °C/min, the thermal decomposition peak of TNBA is at TP=285.3 °C, and the activation energy is EK=91 kJ/mol, which is higher than the Tp and EK values of TNT. This indicates that TNBA is a relatively easy to decompose explosive, but the decomposition rate is not fast. The critical temperature for thermal explosion of TNBA reached Tb=247 °C, which is higher than the Tb value of TNT, slightly lower than the Tb value of DNAN, and significantly higher than the Tb value of DNTF, TNAZ, and MTNP. The combustion performance test results showed that the TNBA sample has the highest combustion pressure and the highest pressurization rate; and the TNBA sample has the highest combustion temperature; however, due to the high oxygen balance, the combustion heat of TNBA samples in excess pure oxygen is not the highest.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":"41 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activation and reaction mechanism of nano‐aluminized explosives under shock wave 纳米铝炸药在冲击波下的活化和反应机理

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-30 DOI: 10.1002/prep.202300318

Zhandong Wang, Chuan Xiao, Fang Chen, Shuang Wang, Liangliang Zhang, Qingzhao Chu

{"title":"Activation and reaction mechanism of nano‐aluminized explosives under shock wave","authors":"Zhandong Wang, Chuan Xiao, Fang Chen, Shuang Wang, Liangliang Zhang, Qingzhao Chu","doi":"10.1002/prep.202300318","DOIUrl":"https://doi.org/10.1002/prep.202300318","url":null,"abstract":"To investigate the effect of aluminum (Al) nanoparticles on the energy release mechanism of high explosives, a comprehensive analysis was conducted on the mechanical response and chemical reaction mechanism of pure 1,3,5‐Trinitro‐1,3,5‐triazinane (RDX) and nano‐aluminized RDX across varying particle velocities using molecular dynamics simulation. The simulation results show that the velocity of the shock wave which is formed in the explosive increases as the velocity of the particle increases. Notably, detonation was absent when the particle velocity was below 3 km/s, but prominently observed beyond this threshold, accompanied by a diminishing delay in reaction time for aluminum particles as particle velocity increased. After detonation, a localized pressure reduction behind aluminum particles was observed, elucidating the diminished detonation efficacy of aluminized explosives. Furthermore, the introduction of aluminum particles led to a deceleration in the RDX reaction rate, with the emergence of aluminum atomic clusters highlighting previously overlooked gas‐phase reactions that necessitate inclusion in detonation modeling for aluminized explosives.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":"51 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanism of hot‐spot formation of emulsion explosives sensitized by hydrogen‐storage glass microballoons 储氢玻璃微球敏化乳化炸药热点形成的机理

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-30 DOI: 10.1002/prep.202300335

Yixin Wang, Honghao Ma, Zhaowu Shen, Jiping Chen

{"title":"Mechanism of hot‐spot formation of emulsion explosives sensitized by hydrogen‐storage glass microballoons","authors":"Yixin Wang, Honghao Ma, Zhaowu Shen, Jiping Chen","doi":"10.1002/prep.202300335","DOIUrl":"https://doi.org/10.1002/prep.202300335","url":null,"abstract":"In order to investigate the primary factors influencing hot‐spot formation in emulsion explosives sensitized by hydrogen‐storage glass microballoons (GMBs), we conducted impact calculations on hydrogen‐storage GMBs. The calculations focused on tracking two main mechanisms: the brittle collapse of GMBs and the adiabatic compression of internal gas. Various parameters were considered, including loading pressures, initial porosities, gas types, and initial gas pressures. Our findings indicate that the contribution of brittle collapse to hot‐spot formation is negligible, while adiabatic compression emerges as the predominant intrinsic mechanism for hot‐spot ignition in GMB‐sensitized emulsion explosives. Moreover, we observed that the ignition time remains similar for low‐pressure nitrogen and high‐pressure hydrogen. The addition of hydrogen does not result in an increased number of hot‐spots; however, it elevates the energy of each individual hot‐spot, thereby enhancing power delivery. Optimal selection of GMB size is crucial for hot‐spot formation and hydrogen storage. GMBs that are excessively large are prone to shell breakage, while overly small GMBs have limited hydrogen storage capacity. GMBs within the size range of 20 μm to 100 μm are deemed more suitable for emulsion explosives.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":"120 17-18 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Future Articles: Prop., Explos., Pyrotech. Prop., Explos., Pyrotech. 6/2024 未来文章：道具、爆炸物、烟火技术Prop.6/2024

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-18 DOI: 10.1002/prep.202480599

引用次数: 0

Cover Picture: (Prop., Explos., Pyrotech. 5/2024) 封面图片：（道具、爆炸、烟火 5/2024）

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-18 DOI: 10.1002/prep.202480501

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Contents: Prop., Explos., Pyrotech. 5/2024 内容：Prop.5/2024

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-18 DOI: 10.1002/prep.202480511

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Forthcoming Meetings: Prop., Explos., Pyrotech. 5/2024 即将召开的会议：Prop.5/2024

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-18 DOI: 10.1002/prep.202480598

引用次数: 0

Trinitroethyl hydrazides of dicarbonic acids – Energetic compounds with high oxygen and nitrogen content 二碳酸的三硝基乙基酰肼--含氧量和含氮量高的高能化合物

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-13 DOI: 10.1002/prep.202300266

Thomas M. Klapötke, Burkhard Krumm, Christian Riedelsheimer

引用次数: 0

Effects of slit plate design on mechanical properties of castable plastic bonded explosives 缝隙板设计对可浇注塑料粘结炸药机械性能的影响

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-05-13 DOI: 10.1002/prep.202300340

Alper Sevinc, Baris Edis

{"title":"Effects of slit plate design on mechanical properties of castable plastic bonded explosives","authors":"Alper Sevinc, Baris Edis","doi":"10.1002/prep.202300340","DOIUrl":"https://doi.org/10.1002/prep.202300340","url":null,"abstract":"The effect of slit plate design on PBXs quality was systematically studied from the point of view voids and powder‐binder separation phenomenon. PBXN‐109 type explosive samples were prepared in accordance with MIL−E‐82886 and cast through slit plates of different geometry and perforation size. The other casting parameters such as casting time, temperature, pressure, valve opening and PBX amount kept constant to prevent uncertainties arising from these parameters. Density measurements, X‐ray inspection and tensile tests were carried out to evaluate the air removal and powder‐binder separation characteristic of slit plates. Density measurements did not provide a clear interpretation of the powder‐binder separation and deaeration abilities of slit plates. X‐ray inspections and tensile tests showed that the dimensions and design of slit plate perforations have impact on voids and powder‐binder separation in PBXs. The slit plate #E showed relatively poor performance in terms of stress property, attributed to the largest cross‐sectional area per perimeter length ratio of perforations, leading to decrease in air removal ability.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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On‐demand microwave growth of porosity within a granular composite energetic material: Void formation via a dielectric loss phase change binder additive for propellant burning rate control 在颗粒状复合高能材料中按需用微波制造孔隙：通过介电损耗相变粘合剂添加剂形成空隙，控制推进剂燃烧速率

IF 1.8 4区工程技术

Propellants, Explosives, Pyrotechnics Pub Date : 2024-04-19 DOI: 10.1002/prep.202300229

Justin A. Lajoie, Brock Jones, Adam R. Lawrence, Stuart J. Barkley, Travis R. Sippel

{"title":"On‐demand microwave growth of porosity within a granular composite energetic material: Void formation via a dielectric loss phase change binder additive for propellant burning rate control","authors":"Justin A. Lajoie, Brock Jones, Adam R. Lawrence, Stuart J. Barkley, Travis R. Sippel","doi":"10.1002/prep.202300229","DOIUrl":"https://doi.org/10.1002/prep.202300229","url":null,"abstract":"This study demonstrates, for the first time ever, the ability to grow, in an on‐command fashion, porosity within a granular composite energetic material to effect a change in energy output rate. Specifically, the study investigates the change in burning rates of ammonium perchlorate composite propellants as a result of porosity created in situ via microwave field‐driven volatilization of the low boiling point binder additive, ethylene glycol. Theoretical mass densities were measured before and after microwave irradiation finding that the maximum observed %TMD change for tested propellants is 6 %. Propellants were burned at 1.72 MPa to 6.89 MPa pressures, finding that for all propellants, microwave irradiation produced a change in ballistic characteristics. Most propellant formulations demonstrate acceptable burning rate parameters for use within rocket motors; some exhibited a large change in their pressure exponent as well as slope breaks attributed to the onset of convective burning, while microwave irradiation produced no change in burning rate or density in reference propellants without the additive. Microwave heating simulation results are presented to gain insight into the thermal environment of the propellant during microwave irradiation. These results provide valuable insight into propellant formulations that can have their burning rates (and thus the thrust profile for motor grains) altered after casting via microwave irradiation.","PeriodicalId":20800,"journal":{"name":"Propellants, Explosives, Pyrotechnics","volume":"206 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140630122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0