Abstract
A simple and linear integral method which uses multiple heating schedules to evaluate the kinetic parameters has been proposed by Trache–Abdelaziz–Siouani (TAS). This approach is based on the combination of the iterative modified Coats–Redfern equation with the kinetic compensation parameters (ln A = aE + b). The suggested method was applied to experimental non-isothermal data obtained from the literature for decomposition of gun propellant containing the mixed ester of triethylene glycol dinitrate and nitroglycerin studied by differential scanning calorimeter at two different pressures (0.1 and 2 MPa). This method leads to consistent pre-exponential factor and kinetic model with those obtained from the accurate approximation of Tang et al. using the activation energy derived from either the integral nonlinear Vyazovkin procedure or the Friedman’s differential method. These kinetic parameters are reliable with those obtained by two integral linear (iterative Kissinger–Akahira–Sunose and iterative Flynn–Wall–Ozawa) methods as well. The superiority of TAS method is due to the possibility of obtaining all the kinetic parameters in an objective manner with a reasonable computation time.
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Trache, D., Abdelaziz, A. & Siouani, B. A simple and linear isoconversional method to determine the pre-exponential factors and the mathematical reaction mechanism functions. J Therm Anal Calorim 128, 335–348 (2017). https://doi.org/10.1007/s10973-016-5962-0
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DOI: https://doi.org/10.1007/s10973-016-5962-0