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Application of Nano-Sized RDX in CMDB Propellant with High Solid Content
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-07-26 , DOI: 10.1002/prep.202100076 Haomiao Yu 1 , Sensen Sun 1 , Jianbing Gao 2 , Xiaoxun Jin 3 , Jie Liu 1 , Fengsheng Li 1
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-07-26 , DOI: 10.1002/prep.202100076 Haomiao Yu 1 , Sensen Sun 1 , Jianbing Gao 2 , Xiaoxun Jin 3 , Jie Liu 1 , Fengsheng Li 1
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Compared to the ordinary RDX, nano-sized RDX has many more excellent properties. Therefore two kinds of CMDB propellant were prepared for comparison. One is the normal CMDB propellant called M-CMDB propellant, the other is N-CMDB propellant which adds nano-sized RDX to CMDB propellant. The morphology characterization, tensile properties, sensitivity, and combustion performance of the propellants were investigated, the results for N-CMDB propellant were compared with that for the normal one. It has been found that the interface of N-CMDB propellant showed no stratification and fewer overall defects than the normal one. The value of σm and ϵm for N-CMDB propellant are increased by 32.6 % and 25.2 % at 323.15 K, respectively. At 293.15 K, the σm and ϵm values of N-CMDB propellant also increased by 25.4 % and 46.9 % and increased by 17.5 % and 23.7 %, respectively, at 233.15 K. The friction and impact sensitivities of N-CMDB propellant are decreased by 51.3 % and 50.4 %, respectively. The TG/DSC study indicated that, compared with M-CMDB propellant, the thermal decomposition peak temperature of N-CMDB propellant is advanced, and the apparent activation energy is reduced by about 6.0 % to 144.3 kJ ⋅ mol−1. Combustion performance measurements were carried out. It was observed that nano-sized RDX is a good burning rate enhancer, because of the burning rate coefficient value of N-CMDB propellant is relatedly increased by 36.9 %. Besides, the pressure exponent of N-CMDB propellant is relatively decreased by 21.6 %. All the results indicate that the application of nano-sized RDX will help to improve the comprehensive performance of CMDB propellant.
中文翻译：
纳米级RDX在高固含量CMDB推进剂中的应用
与普通RDX相比，纳米级RDX具有更多优异的性能。因此制备了两种CMDB推进剂进行比较。一种是普通的CMDB推进剂，称为M-CMDB推进剂，另一种是在CMDB推进剂中加入纳米级RDX的N-CMDB推进剂。研究了推进剂的形貌表征、拉伸性能、灵敏度和燃烧性能，并将 N-CMDB 推进剂的结果与正常推进剂的结果进行了比较。发现N-CMDB推进剂界面没有分层，整体缺陷比正常界面少。N-CMDB 推进剂的σ m和ϵ m值在 323.15 K 时分别增加了 32.6% 和 25.2%。在 293.15 K 时，σ在 233.15 K 时，N-CMDB 推进剂的m和ϵ m值也分别增加了 25.4 % 和 46.9 %，分别增加了 17.5 % 和 23.7 %。N-CMDB 推进剂的摩擦和撞击敏感性分别降低了 51.3 % 和 50.4。 ％， 分别。TG/DSC研究表明，与M-CMDB推进剂相比，N-CMDB推进剂的热分解峰温度提前，表观活化能降低约6.0%至144.3 kJ·mol -1. 进行燃烧性能测量。观察到纳米级RDX是一种很好的燃速增强剂，因为N-CMDB推进剂的燃速系数值相应增加了36.9%。此外，N-CMDB推进剂的压力指数相对降低了21.6%。结果表明，纳米RDX的应用将有助于提高CMDB推进剂的综合性能。
更新日期：2021-07-26
中文翻译：
纳米级RDX在高固含量CMDB推进剂中的应用
与普通RDX相比，纳米级RDX具有更多优异的性能。因此制备了两种CMDB推进剂进行比较。一种是普通的CMDB推进剂，称为M-CMDB推进剂，另一种是在CMDB推进剂中加入纳米级RDX的N-CMDB推进剂。研究了推进剂的形貌表征、拉伸性能、灵敏度和燃烧性能，并将 N-CMDB 推进剂的结果与正常推进剂的结果进行了比较。发现N-CMDB推进剂界面没有分层，整体缺陷比正常界面少。N-CMDB 推进剂的σ m和ϵ m值在 323.15 K 时分别增加了 32.6% 和 25.2%。在 293.15 K 时，σ在 233.15 K 时，N-CMDB 推进剂的m和ϵ m值也分别增加了 25.4 % 和 46.9 %，分别增加了 17.5 % 和 23.7 %。N-CMDB 推进剂的摩擦和撞击敏感性分别降低了 51.3 % 和 50.4。 ％， 分别。TG/DSC研究表明，与M-CMDB推进剂相比，N-CMDB推进剂的热分解峰温度提前，表观活化能降低约6.0%至144.3 kJ·mol -1. 进行燃烧性能测量。观察到纳米级RDX是一种很好的燃速增强剂，因为N-CMDB推进剂的燃速系数值相应增加了36.9%。此外，N-CMDB推进剂的压力指数相对降低了21.6%。结果表明，纳米RDX的应用将有助于提高CMDB推进剂的综合性能。
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