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Ammonium dinitramide (ADN) prills were prepared by emulsion crystallization and characterized by optical microscopic, thermogravimetric (TG) and differential scanning calorimetric (DSC) techniques. The isothermal and non-isothermal decomposition kinetics of ADN prills were studied by TG. The differential isoconversional method of Friedman (FR) and integral isoconversional method of Vyazovkin were used to investigate the dependence of activation energy (E a) with conversion (α) and the results were compared with literature data. The dependence of activation energy was also derived from isothermal data. A strong dependence of E a with α is observed for the ADN prills. All the methods showed an initial increase in E a up to α=∼0.2 and later decreases over the rest of conversion. The apparent E a values of FR method are higher than that of Vyazovkin method up to α=∼0.45. The calculated mean E a values by FR, Vyazovkin and standard isoconversional method for α between 0.05 and 0.95 were 211.0, 203.9 and 156.9 kJ mol−1, respectively.

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Thermoanalytical studies of imidazole-substituted coordination compounds

Mn(II)-complexes of bis(1-methylimidazol-2-yl)ketone

Journal of Thermal Analysis and Calorimetry
Authors: S. Materazzi, S. Vecchio, L. W. Wo, and Curtis S. De Angelis

. Estimating isothermal life from thermogravimetric data . J Appl Polym Sci . 1962 ; 6 24 639 – 642 10.1002/app.1962.070062406 . 27. Vyazovkin , S , Wight , CA . Ammonium dinitramide

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excellent fits for both isothermal and nonisothermal data for the thermal decomposition of HMX and ammonium dinitramide, but yields highly uncertain values for Arrhenius parameters when applied to nonisothermal data, implying better reliability for

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, RP , Ghee , AH . Thermal decomposition kinetics of ammonium dinitramide–guanylurea dinitramide mixture analyzed by isoconversional methods . Thermochim Acta 2008 480 : 43 – 48 10.1016/j.tca.2008.09.015 . 25

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