In order to obtain accurate and reliable ash results of fluorine-containing mixed explosives, the quality change of crucible and the reason were studied by the sample amount and different fluoride compounds. The results showED that fluoropolymer in composite explosives haD no effect on the quality of crucible. However, fluorographite would cause larger quality changes of the crucible. When the carbonized sample ashing in a high temperature furnace of 750~800 ℃, graphite fluoride would reacts with silica in crucible, its results in the crucible mass decline and the values of ash was a minus. Platinum crucible or other chemical-resistant crucible should be used during the experiment of composite explosives contained fluorinated graphite to obtain a more accurate value of ash.

为准确获取混合炸药中TNT含量,以无水乙醇为溶剂,超声波辅助溶解样品,用紫外-可见光分光光度计在紫外光谱区测试混合炸药中的TNT含量.结果表明,在335nm波长不使用显色剂的情况下,测试结果的重复性和准确度分别为0.021%和1.0%.模拟样品的回收率大于97%.在新建立的条件下,混合炸药中TNT含量的测试方法准确,快速,稳定性好,能有效提高工作效率.更多还原

从军工企业的分析检测实验室入手,结合检测设备管理实践经验提出针对性措施,将检测设备从引进、安装、使用、维护、保养、报废整个寿命周期实施全过程精细化管理,在保障设备安全运行的同时,提高相关人员的安全意识,促进安全生产.

The 2,2-dinitropropyl acrylate-vinyl acetate( DN PA-VAc) copolymer was synthesized by the free radical polymerization in ethyl acetate using azobisiosbutyronitrile as initiator. The effects of molar ratio of monomers,initiator concentration and time on copolymerization were investigated. The structure and properties of DNPA-VAc copolymer were also characterized by FTIR,1HNMR,DSC and TG measurements. Results show that the copolymer is obtained with the yield of 72% under conditions of DN PA and VAc molar ratio of 3: 1 at 80℃ within 8 hours. The glass transition temperature and thermal decomposition peak temperature of the DNPA-VAc copolymer is 59. 7 ℃and 259. 1 ℃. It is compatible with RDX and HMX,and thermal stable.

2,2-Dinitropropyl acrylate-styrene(DNPA-St) copolymer was synthesized by free radical polymerization in ethyl acetate by using azobisiosbutyronitrile as initiator.The structure and properties of DNPA-St copolymer were also characterized by FTIR,1H NMR and DSC measurements.The behavior of the copolymerization between 2,2-dinitropropyl acrylate(DNPA) and styrene(St) was studied,the composition of the copolymer was determined using infrared spectrum method,and the reactivity ratios of DNPA and St were measured.Results show that the reactivity ratios of DNPA and St was obtained by using the Fineman-Ross method,rDNPA=0.911 and rSt=0.038,respectively.The polymerization of DNPA with St is a non-ideal copolymerization,and the products are random copolymers.The glass transition temperature and thermal decomposition temperature of the DNPA-St copolymer is 63.3 ℃ and 251.4 ℃.It is compatible with RDX and HMX,and thermal stability.

Thermal decomposition of JOB-9003 explosive was studied at lower temperature range(60℃-90℃)and higher temperature range(110℃-140℃) by Bourdon manometer method respectively,and thermal ageing life of the explosive was evaluated.The gas species given off and the condensation phase at the lower temperature range were further analyzed by SPME-GC-MS and XPS.The results suggested that:1) JOB-9003 explosive possessed good thermal stability and its surface structures remained unchanged at 60℃-90℃;2) The storage life evaluated was 34.4 years for JOB-9003 explosive at 60℃ based on the decomposition depth of 0.1%.

The energetic binder poly(2,2-dinitropropyl acrylate)(PDNPA) was synthesized by the free radical polymerization of 2,2-dinitropropyl acrylate in toluene with azobisiosbutyronitrile as initiator,and were characterized by FTIR,1HNMR,UV and DSC.The effects of initiator concentration and temperature on polymerization were investigated.Results show that the average molecular weight of the polymer decreases and molecular weight distribution(MWD) becomes narrow as increasing initiator concentration.Monomer is with 60% conversion obtained at 80 ℃ within 2 hours.The thermal decomposition temperature of PDNPA is 252.8 ℃.

In-situ FTIR was employed to study the characteristics of thermal decomposition of TEX in the process of tempaerature programming.The thermal decomposition mechanism was deduced.The first step of TEX thermal decomposition was denitration,and the evolutaed gases were mainly NO_2,N_2O,HCN,NO,CO and aldehyde group-containing products.

The corrosion effect of stainless steel and aluminium contacting with plastic bonded explosives is investigated. By using the superficial technique such as XPS and laser confocal scanning system,the characteristics of corrosives are detected. The results of accelerated aging tests have shown that the environmental conditions (humidity and temperature) are important factors to affect the metals. Except for that,the contents of the chloride in the plastic bonded explosives are inclined to make the metals corroded.