The thermal decompositions of two systems(No.1,KClO3(52.2％)/CuO(26.0％)/S(9.6％)/Mg-Al(3.5％)/C6Cl6(4.35％) and No.2,KClO3(52.2％)/CuO(26.0％)/S(9.6％)/Mg-Al(3.5％)/C6Cl6(4.35％) are studied using Accelerating Rate Calorimeter (ARC). Temperature vs time curve and pressure vs time curve of reactions are shown in Fig.1 and Fig.2 respectively. The basic data including reaction time(1.3 and 7.3 min respectively), initial temperature(159 and 150 ℃ respectively),temperature at the maximum rate(272 and 272 ℃ respectively), the maximum pressure(420 and 190 kPa respectively) and the activation energies(175.6 and 135.2 kJ· mol－ 1 respectively) of the thermal decomposition are given to evaluate the safety of the two systems. Results indicate that system No.2 is safer than system No.1. Compared with the traditional methods, ARC technique can be used to measure temperature and pressure of exothermic reaction concurrently, to find the tiny exothermicity and to determine the initial temperature of exothermic reaction.
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