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Possibilities of applying Piloyan method of determination of decomposition activation energies in differential thermal analysis of polynitroaromatic compounds and their derivatives

Part IV. 1,3,5-trinitrobenzene, 2,2′,4,4′,6,6′-hexanitrobiphenyl, 2,2′,2″,4,4′,4″,6,6′,6″-nonanitro-m-terphenyl, 1,4,5,8-tetranitronaphthalene and 2,4,6-tripicryl-l,3,5-triazine

Journal of Thermal Analysis and Calorimetry
Author: S. Zeman

The Piloyan activation energiesE of decomposition and the initial temperaturesT D of the exotherms of hexanitrobiphenyl (HNB), nonanitro-m-terphenyl (NONA), tripicryl-s-triazine (TPT) and 1,4,5,8-tetranitronaphthalene (TENN) have been determined by means of non-isothermal DTA. Due to its volatility in the zone of the beginning of thermal decomposition onlyT D values are specified fors-trinitrobenzene (TNB). From the values ofE ·T D −1 for HNB and from the derived values ofE ·T D −1 for TNB on the one hand, and from the published values of the Arrhenius parameters obtained by means of the manometric method on the other, relationships have been derived. The relationship betweenE ·T D −1 and the standard activation enthropy is considered relevant.

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Isoconversional analysis of solid state transformations

A critical review. Part II. Complex transformations

Journal of Thermal Analysis and Calorimetry
Authors: J. Farjas and P. Roura

assumptions. Moreover, we will provide some piece of advice to manipulate experimental data to apply isoconversional methods properly. Non-constancy of the activation energy Originally isoconversional methods were based on the

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been used widely to estimate the kinetic parameters of degradation processes, such as activation energies ( E ), reaction order ( n ), and the Arrhenius pre-exponential factor ( A ) [ 17 – 19 ], which can be calculated using various kinetic models such

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kinetically treated as a gas–solid reaction to study the reduction behavior using model based and model-free methods. In model based methods, a single run data is used to calculate the Arrhenius activation energy values whereas model-free methods involve

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Journal of Thermal Analysis and Calorimetry
Authors: F. M. Aquino, D. M. A. Melo, R. C. Santiago, M. A. F. Melo, A. E. Martinelli, J. C. O. Freitas, and L. C. B. Araújo

. The objective of this study is to study the thermal degradation of the ligand groups with the metallic ions of the system using the Flynn and Wall and “Model-free kinetics” methods and evaluate the results in order to establish the activation energy as

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(activation energy, pre-exponential factor, and conversion function) of each degradation step is one important target of kinetic investigations. Many kinetic analysis methods have been developed, among which isoconversional methods have been widely used [ 1

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