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8348326 
Journal Article 
一种新型CL-20/TKX-50共晶炸药的制备, 表征和性能研究 
Yuan, S; Gou, BW; Guo, SF; Xiao, L; Hu, YB; Chen, T; Hao, GZ; Jiang, W 
2020 
China Ordnance Industry Corporation 
43 
2 
167-172 and 179 
Chinese 
To reduce the sensitivity of CL-20, the CL-20/TKX-50 cocrystal explosive was successfully prepared by solvent-nonsolvent method. The surface electrostatic potentials of CL-20 and TKX-50 were analyzed by Materials Studio 5.0 software, and the possible noncovalent bonding between cocrystal molecules was predicted. Its morphology and structure were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared (IR) and Raman spectroscopy (Raman). The thermal properties were measured by differential scanning calorimetry (DSC), the impact sensitivity was tested and the detonation performance was predicted. The results show that the prepared CL-20/TKX-50 cocrystal has a flat sheet shape. The formation, disappearance, shift and change of intensity of peaks in XRD, IR and Raman spectra prove the formation of a new lattice structure. At the heating rate of 8℃/min, the main thermal decomposition peak temperature of CL-20/TKX-50 cocrystal is 222.8℃, that is 17.5℃ and 12.1℃ earlier than that of CL-20 and TKX-50 at 240.3℃ and 234.9℃, respectively, which is obviously different from that of CL-20/TKX-50 mixture with two exothermic processes. The sensitivity of CL-20/TKX-50 cocrystal explosive is significantly lower than that of CL-20 and better than that of β-HMX, which indicates that it has good safety performance. The predicted detonation velocity and detonation pressure of CL-20/TKX-50 cocrystal are 9264m/s and 43.8GPa, slightly lower than that of CL-20, while compared with β-HMX, the detonation performance is significantly improved. Both the surface electrostatic potential energy and modeling analysis show that hydrogen bond is easy to form between O of -NO2 in CL-20 and H of -NH3 + in TKX-50. © 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved. 
CL-20; Cocrystal; Energetic material; Sensitivity; Thermal analysis; TKX-50