Kinetics and Mechanism of the Exothermic First-stage Decomposition Reaction of Dinitroglycoluril

摘要

Under linear temperature increase condition, the thermal behavior, mechanism and kinetic parameters of the exothermic decomposition reaction of the title compound have been studied by means of DSC and IR. The initial stage reaction mechanism was proposed. The empirical kinetic model function in differential form, apparent activation energy and pre-exponential constant of the exothermic decomposition reaction are a~(0.526), 207.0 kJ·mol~(-1) and 10~(18.49) s~(-1) , respectively. The critical temperature of thermal explosion of the compound is 252.87_. The values of ΔS~≠,ΔH~≠and ΔG~≠ of this reaction are 128.4 J·mol~(-1)·K~(-1), 218.9 kJ·mol~(-1) and 152.7 kJ·mol~(-1), respectively.