Thermokinetic Study of Degradation of Cyclonite/Copper Nitrate Energetic Composition

Riahi, Ali; Damiri, Sajjad; Mahdavi, Mohammad

Volume 20, Issue 2 (1-2026) مواد پرانرژی 2026, 20(2): 79-88 | Back to browse issues page

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Riahi A, Damiri S, Mahdavi M. Thermokinetic Study of Degradation of Cyclonite/Copper Nitrate Energetic Composition. مواد پرانرژی 2026; 20 (2) : 2
URL: http://isaem.ir/article-1-1545-en.html

Thermokinetic Study of Degradation of Cyclonite/Copper Nitrate Energetic Composition

Ali Riahi

, Sajjad Damiri ^*

, Mohammad Mahdavi

Malek-Ashtar University of Technology , s_damiri@mut-es.ac.ir

Abstract: (4 Views)

In this study, the possibility of synthesizing a new and inexpensive high-energy complex based on copper (II) nitrate salt and the cyclonite or cyclotrimethylene trinitramine (RDX) explosive with a molar ratio of 1 to 4 was investigated, and its various chemical, safety and thermokinetic properties of its thermal degradation was evaluated in comparison to pure RDX. The X-ray diffraction (XRD) pattern of the material indicates the formation of a new quasi-complex structure (RCuN) of Cu(II) ion and RDX ligand. Also, the thermal degradation behavior and decomposition kinetics of RDX explosives and RCuN complex were investigated using differential scanning calorimetry (DSC) at heating rates of 1, 2, 4, 5, and 6 °C/min. The kinetic triplet parameters such as activation energy, pre-exponential factor (A), and reaction model were evaluated using model-dependent and model-independent methods proposed by the International Thermal Analysis and Calorimetry Council (ICTAC). According to the studies, the activation energy at a conversion fraction of 0.5 for RDX and RCuN was found to be 187.93 kJ/mol and 191.73 kJ/mol, respectively, with the logarithm of the exponential constant (lnA) being 39.90615 and 40.92301, respectively. Also, by matching the experimental z(α) data of both explosives with the theoretical z(α), for RDX the A1 reaction model with the integral function -ln(1-α) and for the RCuN the A3/2 reaction model with the integral function

were selected as the more appropriate models. Next, using the determined rate equation, the lifetimes of RDX and the RCuN product were estimated at different temperatures, and the results showed that the RCuN degradation process occurs at a much faster rate.

Article number: 2

Keywords: Energetic, Copper Nitrate, RDX, DSC Thermal Analysis, Thermo-kinetic, Lifetime.

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Type of Study: Research | Subject: سنتز، آناليز، کنترل کيفيت، فرمولاسيون و فرايندهاي توليد مواد پرانرژی (منفجره، پيروتکنيک و پيشرانه)
Published: 2026/01/25