Journal Article
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Pei, B; Peng, S; Cao, R; Zhao, C
Guti Huojian Jishu / Journal of Solid Rocket Technology
ISSN: 1006-2793
Journal of Solid Rocket Technology
The microcalorimetry method was used to study the dynamics of CL-20/HMX co-crystal in nitrate plasticized GAP adhesive system at 70 â, 75 â, and 80 â, and X-rays Diffraction (XRD), environmental scanning electron microscopy (SEM), and differential scanning calorimetry (DSC) were performed on the products after the microcalorimetry test.XRD, SEM, and DSC analysis results show that CL-20 and HMX will combine with each other to form a CL-20/HMX co-crystal after the microcalorimetric test, and all of them have been converted into CL-20/HMX co-crystal.The Avrami equation and Arrhenius equation are used to process the trace heat and heat flow data of the CL-20/HMX co-crystal process.The calculation results show that the higher the temperature, the faster the crystallization fraction increases with time, indicating that the temperature increase is beneficial to improve the nitrate plasticized GAP adhesive formation rate of CL-20/HMX co-crystal; Avrami index n=1.41, indicating that the CL-20/HMX co-crystal process in nitrate plasticized GAP adhesive system conforms to the two-dimensional nucleation mechanism; Arrhenius refers to the pre-factor A=7.46Ã108, the activation energy Ea of the CL-20/HMX co-crystal process is Ea=108.88 kJ/mol, indicating that the crystallization rate constant k of the CL-20/HMX co-crystal is k=5.26Ã108 exp(-12980.14/T), and the kinetic equation of CL-20/HMX co-crystal is 1-α=exp[-5.26Ã108 exp(-12980.14/T)t1.41]. © 2020, Editorial Dept. of JSRT. All right reserved.
2, 4, 6, 8, 10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane/1, 3, 5, 7-tetranitro-1, 3, 5, 7-tetrazacyclooctane (CL-20/HMX) co-crystal; Avrami equation; Crystallization dynamics; Microcalorimetry