Insensitive Cl-20/Cyclotetramethylenetetranitramine (Hmx) Co-Crystals With High Performance by Ultrasonic in Solvent

Song, Changkun; An, Chongwei; Zhang, Yuruo; Ye, Baoyun; Li, Hequn; Wang, Jingyu

doi:10.1615/intjenergeticmaterialschemprop.2018022517

Cited by 4 publications

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“…Cocrystallization engineering, a novel method to effectively modulate the properties of energetic materials (EMs), has attracted extensive attention in recent years. , The as-prepared cocrystal explosive is a new type of EM composed of different energetic molecules with an ordered arrangement. , Notably, the property of the cocrystal explosive is significantly different from that of EMs formed by single type of molecules, exhibiting remarkable comprehensive performance in terms of energy, safety, and environmental adaptability. For example, the detonation velocity of CL-20/HMX (2,4,6,8,10,12-hexanitrohexaazaisowurtzitane/cyclotetramethylenete-tranitramine) cocrystal is as high as 9484 m/s, which is close to that of CL-20, while it shows a low mechanical sensitivity similar to β-HMX. − Besides, the optimized oxygen balance coefficient and superior initiation ability make CL-20/BTF (2,4,6,8,10,12-hexanitrohexaazaisowurtzitane/benzotrifuroxan) cocrystal a potential candidate to replace BTF. , Moreover, CL-20/TNT (2,4,6,8,10,12-hexanitrohexaazaisowurtzitane/trinitrotoluene) shows a higher melting point (143.5 °C) than TNT (81 °C), implying an improved adaptability to the environment. Therefore, a variety of cocrystal explosives have been developed for the purpose of adjusting the physical and chemical properties, safety, and detonation performance of pure explosives.…”

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confidence: 98%

“…The practical application of cocrystal explosives highly requires in-depth understanding of their thermal kinetic behavior, but the relevant research is still rare. In this study, we selected CL-20/BTF (2,4,6,8,10,12-hexanitrohexaazaisowurtzitane/benzotrifuroxan) cocrystal as a typical cocrystal explosive to investigate its thermal kinetics and decomposition mechanism. The thermal behavior of CL-20/BTF shows no phase transition or solid−liquid melting process before decomposition, which is distinct from those of pure CL-20 and BTF crystals.…”

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confidence: 99%

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Thermal Kinetics of Energetic CL-20/BTF Cocrystal Induced by Strong Intermolecular Coupling

et al. 2022

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Energetic cocrystals are an attractive new family of explosives with a potential for high energy and low sensitivity. The practical application of cocrystal explosives highly requires in-depth understanding of their thermal kinetic behavior, but the relevant research is still rare. In this study, we selected CL-20/BTF (2,4,6,8,10,12-hexanitrohexaazaisowurtzitane/benzotrifuroxan) cocrystal as a typical cocrystal explosive to investigate its thermal kinetics and decomposition mechanism. The thermal behavior of CL-20/BTF shows no phase transition or solid–liquid melting process before decomposition, which is distinct from those of pure CL-20 and BTF crystals. Further, we identified the thermal decomposition of CL-20/BTF as a particular reaction kinetics consisting of two parallel autocatalytic paths, in which the contribution of these two paths to the overall reaction varies with the change of heating rate. Based on the established kinetic model, important thermal safety indicators including TMRad and SADT are simulated. Finally, in situ infrared spectroscopy was performed to detect the molecular evolution of CL-20/BTF cocrystal during thermal decomposition, which is helpful to understand the origin of its thermal kinetics. It is found that the unique decomposition mechanism of strong intermolecular coupling between CL-20 and BTF molecules is responsible for the parallel reaction paths of the thermal kinetics of the CL-20/BTF cocrystal.

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