An analytical method for overlapping of the melting and decomposition of 2-oximemalononitrile
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An analytical method for overlapping of the melting and decomposition of 2‑oximemalononitrile Yan‑Long Zhu1,2 · Jing An2 · Hai Chang2 · Xiao‑Feng Wang2 · Jing Zhou2 · Li Ding2 · Xiao‑Ling Zhang1 Received: 4 March 2020 / Accepted: 28 July 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract In the thermal analysis of many energetic compounds, there is a phenomenon of melting before decomposition, and the melting endothermic process is masked by the subsequent rapid exothermic decomposition, which has affected the research of separation in melting and thermal decomposition processes. 2-oximemalononitrile, an energetic intermediate whose melting and decomposition processes had the overlapping, was used as the research object in this paper, and the complete melting and decomposition processes were acquired by MATLAB software, separately. In addition, the kinetics and mechanism of thermal decomposition of 2-oximemalononitrile were investigated by Málek method, which was used as guidance for the safe application in handling, processing, and storage. Keywords 2-oximemalononitrile · Kinetic parameters · Overlapping · MATLAB software
Introduction Currently, there are many researches on thermal decomposition of energetic compounds [1–6]. It is well known that thermal analysis of energetic materials (EMs) is important not only for understanding of the kinetics of their thermal decomposition but also for assessing the effect of their exothermic decomposition on the potential hazardous in their handling and processing. Kinetic studies also provide useful information [7–14] on the thermal stability and life expectancy (reliability) of EMs under different thermal environment in storage. In the thermal analysis test process of many energetic compounds, there is a phenomenon of melting before decomposition, such as PETN, RDX, and HMX [15–17], and the melting endothermic process is masked by the subsequent rapid exothermic decomposition, which has affected the research of separation about melting and thermal decomposition especially for the thermal decomposition process.
* Li Ding [email protected] 1
School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
Xi’an Modern Chemistry Research Institute, Xi’an, Shaanxi, China
2
At present, thermal analysis kinetics software (AKTS) and MATLAB software are reported to separate the overlapping parts of the thermal analysis process [18–20]. The principle of both of them is to use suitable mathematical functions for curve fitting to find the best matching function model and parameters. In the process of obtaining the kinetic parameters (triplet), Málek proposed a complete method [21–27]. Its advantage is to avoid the trouble of trying kinetic model one by one, and avoid the mutual influence of the simultaneous acquisition of kinetic triplet. It has been widely used in the thermal analysis kinetics research process [28–33]. 2-oximemalononitrile is the main intermediate in the synthesis of furazan energetic compounds, which is obtained fr
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