Issue 8, 2020

The isothermal decomposition of a CL-20/HMX co-crystal explosive

Abstract

The isothermal decomposition process of CL-20/HMX co-crystals was studied through an isothermal decomposition dynamics research method. The pressure versus time curves of the gas generated by the CL-20/HMX co-crystal thermal decomposition present a significant inflection point at the decomposition extent of 70%. Furthermore, the residue of the CL-20/HMX co-crystals was investigated by HPLC and FTIR spectroscopy to understand the decomposition process. The results manifest that the decomposition of the CL-20/HMX co-crystals before and after the inflection point conforms to different model equations with the activation energies of 149.3 kJ mol−1 and 169.0 kJ mol−1, respectively. The thermal decomposition of the CL-20/HMX co-crystals is a coupling process. Clearly, the decomposition rate of CL-20 is much higher than that of HMX before the inflection point; CL-20 is almost consumed when the inflection point is reached in the pressure–time curve of the CL-20/HMX co-crystal thermal decomposition and then, HMX accelerates the thermal decomposition of the CL-20/HMX co-crystals.

Graphical abstract: The isothermal decomposition of a CL-20/HMX co-crystal explosive

Article information

Article type
Paper
Submitted
25 ربيع الأول 1441
Accepted
27 جمادى الأولى 1441
First published
16 جمادى الثانية 1441

CrystEngComm, 2020,22, 1473-1479

The isothermal decomposition of a CL-20/HMX co-crystal explosive

L. Luo, Z. Chai, B. Jin, Q. Huang, Z. Guo and R. Peng, CrystEngComm, 2020, 22, 1473 DOI: 10.1039/C9CE01850F

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