“…For experimental isothermal data at 80, 85, 90 C, this model describes the shape and position of the main peak, but cannot describe the initial range with slow decomposition in the solid phase. The presence of melting for isothermal conditions is in agreement with [9,10], which point to the rapid submelting of the sample in the range between the phase transition temperature of 80 C and 100 C. Gyevi and Tüdös [13] uses X-ray diffractograms for isothermal measurements of AIBN at 85 C and they found that the slow melting and decomposition from the liquid phase exist during the autocatalytical acceleration of the reaction. Therefore, this melting step is reasonable by description of the isothermal decomposition in this range.…”