Kinetic parameters for two types of exothermal reaction have been determined applying a new software program for multiple curve as well as multiple reaction step analysis. The exothermal deflagration of hexogen (cyclo-1,3,5-trimethylene-2,4,6-trinitramine, RDX), measured by heat flux DSC at four different heating rates (2.5 to 20 K/min), was identified as a consecutive two step reaction. The first step of n-th order type showed the activation energy E = 193 +/- 3 kJ/mol, the second reaction step of first order type with autocatalytic contribution showed E = 186 +/- 2 kJ/mol. The vulcanization of a synthetic rubber (EPDM) was measured at five different heating rates (1 to 20 K/min). The exothermal DSC-curves could be best approximated by a two step reaction model of consecutive n-th order reactions. The activation energy of the main step is E = 180 +/- 3 kJ/mol, the second step is a superimposed endothermal reaction with E = 16.6 +/- 3.5 kJ/mol. The perfect agreement between recalculated and experimental curves and the degree of conversion of the samples at different time and temperature correlations are shown.
