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Performances and direct writing of CL-20 based ultraviolet curing explosive ink
Defence Technology ( IF 5.1 ) Pub Date : 2020-11-28 , DOI: 10.1016/j.dt.2020.11.015
Sheng Kong 1, 2 , Dong-jie Liao 1, 2 , Yu-meng Jia 1, 2 , Chong-wei An 1, 2 , Chun-yan Li 1, 2 , Bao-yun Ye 1, 2 , Bi-dong Wu 1, 2 , Jing-yu Wang 1, 2 , Hao Guo 3 , Zhi-wei Hong 4
Affiliation  

A new type of explosive ink formulation that can be quickly cured was prepared with unsaturated polyester as binder, styrene as active monomer, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide as photoinitiator, and hexanitrohexaazaisowurtzitane (CL-20) as the main explosive. Then the explosive ink direct writing technology was used to charge the micro-sized energetic devices, the curing mechanism of the explosive ink was discussed, and the microstructure, safety performance and explosive transfer performance of the explosive ink molded samples were tested and analyzed. Results indicate that the composite material has a fast curing molding speed, its hardness can reach 2H within 8 min. The crystal form of CL-20 in the molded sample is still ε type. The CL-20 based UV-curing explosive ink formulation has good compatibility, its apparent activation energy is increased by about 3.5 kJ/mol. The composite presents a significant reduction in impact sensitivity and its characteristic drop height can reach 39.8 cm, which is about 3 times higher than the raw material. When the line width of charge is 1.0 mm, the critical thickness of the explosion can reach 0.015 mm, and the explosion velocity is 7129 m/s when the charge density is 1.612 g/cm3.



中文翻译:

CL-20系紫外线固化炸药油墨的性能及直写

以不饱和聚酯为粘结剂,苯乙烯为活性单体,2,4,6-三甲基苯甲酰基-二苯基氧化膦为光引发剂,六硝基六氮杂异维茨烷(CL-20)为主要炸药,制备了一种新型可快速固化的炸药油墨配方。然后采用爆炸墨水直写技术对微型能量器件进行充电,探讨了爆炸墨水的固化机理,并对爆炸墨水成型样品的微观结构、安全性能和爆炸转移性能进行了测试和分析。结果表明,该复合材料固化成型速度快,硬度可在8 min内达到2H。成型样品中CL-20的晶型仍为ε类型。CL-20基紫外光固化炸药油墨配方相容性好,表观活化能提高约3.5 kJ/mol。该复合材料的冲击敏感性显着降低,其特征跌落高度可达39.8厘米,约为原材料的3倍。当装药线宽为1.0 mm时,爆炸临界厚度可达0.015 mm,当装药密度为1.612 g/cm 3时,爆炸速度为7129 m/s 。

更新日期:2020-11-28
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