1. A Different Approach in Thermokinetic Analysis of Energetic Materials.
- Author
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Gürpınar, Kübra, Akay, Mehmet Abdülkadir, Tuncer, Yaprak Gürsoy, Atakol, Orhan, and Acar, Nurcan
- Subjects
POLYMERS ,EXPLOSIVES ,CHEMICAL decomposition ,REACTION mechanisms (Chemistry) ,THERMODYNAMICS - Abstract
Thermokinetic analysis is usually a collection of methods applied to polymeric materials, but it can also be applied to energetic materials and others. Energetic substances are explosives, which have been known as energetic substances for the last 30 years and thermokinetic analysis gives useful results to estimate the lifetime and safety of energetic substances. The methods used on thermokinetic analysis are two classes, isothermal and nonisothermal methods. The most commonly used isothermal method is Coats-Redfern method and this method is the basis of many other methods. Nonisothermal methods are more confident methods and the most commonly used nonisothermal methods are Ozawa and Kissinger methods, [1,2]. All methods used fort he thermokinetic analysis are graphical semiamprical methods and different parameters are plotted against 1 / T value in all methods. Semi-experimental thermodynamic parameters of the thermal reaction are calculated from the slopes and shifts of the obtained lines. Thermal decomposition reactions of energetic substances occur in the form of detonation and as estimated detonation reactions are very quickly. Therefore in highly heating rates such as 10, 15, 20, 25 ° C / min., the reaction can be observed as one-step reaction. However, the detonation reaction may be two or more steps and the reaction mechanism is very important for the estimation of the reaction products. For this reason the steps of detonation reactions can only be observed at low heating rates, such as 0.5, 0.75, 1.0. In Ozawa and other Ozawa-based methods, log B (B = heating rate) versus 1 / T value is plotted and if the B value is less than 1 ° C / min, log B is negative and cannot be calculated thermodinamic parameters. In this study, three new energetic substances were prepared from 1,3-dinitro-4,6-dichlorobenzene and thermokinetic analysis of these substances were performed with CR, OFW. [ABSTRACT FROM AUTHOR]
- Published
- 2019