The Kinetic Parameters and Parameter Effect Factors Calculation of multicomponent energetic materials decomposition reaction from a single differential thermal analysis curve

To improve the safety of HMX, a two‐dimensional (2D) graphene oxide (GO) was introduced to HMX by the solventnonsolvent method. The morphology, composition, thermal decomposition characteristic were characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), thermogravimetry (TG) and differential scanning calorimetry (DSC). Compared to the previous reports, GO sheets exhibited better desensitizing effect than [60]Fullerene and CNTs. When 2.0 wt‐% GO sheets were added, the impact sensitivity of raw HMX decreased from 100 to 10 %, and the friction sensitivity reduced from 100 to 32 %. The DSC results proved that GO sheets were compatible with HMX. In addition, by determining the thermal decomposition kinetic parameters of the samples, it was found that the activation energy (Ea) of HMX with 2.0 wt‐% GO increased by 23.5 kJ mol−1, suggesting that GO sheets could improve the thermal stability of HMX.

Section: Resultsmentioning

confidence: 92%

Preparation and Characterization of Insensitive HMX/Graphene Oxide Composites

Wang

Shen

et al. 2013

“…The Raman spectra of GO show characteristic peaks at 1370 cm À 1 and 1580 cm À 1 , and G peak at 1580 cm À 1 , which is caused by the in-plane vibration of the sp 2 carbon atom. D peak at 1370 cm À 1 is caused by functional group structural defects, edge effects, ripples and charge pits on the carbon substrate [35,36]. However, in the Raman spectrum of CL-20/ HMX-M550-GO composite, not only the characteristic peak of CL-20/HMX co-crystal, but also the characteristic D peak and G peak of GO exist, indicating that CL-20/HMX-M550-GO composite has both CL-20/HMX co-crystal and GO structure.…”

Section: Analysis Of Morphology and Structurementioning

confidence: 99%

Desensitization of CL‐20/HMX Co‐Crystal by Functionalized Graphene Oxide

Huang

Song

Guo

et al. 2022

Interface interaction has always been considered a major challenge in the field of desensitization. Co‐crystal explosives can balance the properties of energetic materials, but their limited desensitization effect limits their further practical applications. Based on this, we proposed the desensitization of CL‐20/HMX co‐crystal by three functionalized graphene oxide (NH2‐GO, Am‐GO and M550‐GO). The sensitivity results indicate that the M550‐GO has the best desensitization. To further explore the reasons for the better desensitization effect of M550, molecular dynamics was used to simulate the binding energy and mechanical properties of different systems. The results showed that the electrostatic interaction between functionalized graphene oxide and CL‐20/HMX co‐crystal can enhance the interfacial interaction more than van der Waals force. In a word, this work provides new ideas and insights for enhancing the interface interaction of coating materials and popularizing the practical application of co‐crystal explosives.

“…It can be found in Table 4 that with the increase in heating rate, there is an upward shift in the peak temperature of the exothermic peak and a slight decrease in the DH values of the three samples. The thermal decomposition kinetic parameters of the three samples are determined via DSC by Kissinger method [22,23], and the relevant equation is…”

Section: Thermal Decomposition Characteristicmentioning

confidence: 99%

Preparation and Properties of HMX Coated with a Composite of TNT/Energetic Material

An¹,

Wang²,

Xu³

et al. 2010

To improve the safety of HMX without sacrificing energy properties, the composites of TNT and an energetic material (HP-1) were used to coat HMX particles by a method of integrating solvent -nonsolvent with aqueous suspension-melting. SEM (scanning electron microscopy) and XPS (X-ray photoelectron spectrometry) were employed to characterize the samples. The effect of the processing parameters, such as mass ratio of HP-1 to TNT (MRHT), stirring speed, and cooling rate, on the quality of coated samples were investigated and discussed. The mechanical sensitivity, thermal sensitivity, thermal decomposition characteristic, and heat of detonation of raw and coated HMX samples were also measured and contrasted. Results show that when MRHT, stirring speed in the second stage and cooling rate are 1 : 5, 1000 r · min À1 and 5 8C · min À1 respectively, the optimal coating effect is achieved. Compared with that of raw HMX, both impact and friction sensitivity of HMX coated with 2.5 wt.-% TNT and 0.5 wt.-% HP-1 decrease obviously, whereas there is a slight change in their thermal sensitivity and thermal decomposition characteristics. Meanwhile, such surface coating does not result in the decrease of its energy properties.