Differential and integral isoconversional non-linear methods and their application to energetic materials. III. Non-isothermal decomposition reaction kinetics of benzotrifuroxan

Abstract

The thermal behaviour and decomposition reaction kinetics of benzotrifuroxan (BTF) were determined by TG and DSC techniques. The kinetic parameters of the exothermic decomposition reaction in a temperature programmed mode (the apparent activation energy Ea and pre-exponential factor A) were calculated by a single non-isothermal DSC curve. The E values calculated using the Kissinger and Flynn-Wall-Ozawa equations and integral isoconversional non-linear equations were used to check the validity of activation energy by a single non-isothermal DSC curve. The results show that the kinetic model function in integral form and the values of Ea and A of the decomposition reaction of BTF are [-ln(1-α)]2/3, 109.95 kJ·mol-1 and 108.16 s-1, respectively. The values of δS≠, δH≠ and δG ≠ of this reaction are -93.15 J·mol -1·K-1, 150.72 kJ·mol-1 and 153.15 kJ·mol-1, respectively. The critical temperature of thermal explosion of BTF is 257.33°C. © 2008 SIOC, CAS, & Wiley-VCH Verlag GmbH & Co. KGaA.