An accurate thermal decomposition model helps people take measures of prevention and controlling the burning and explosion accidents

which are caused by thermal run away of materials. This paper mainly studied a sample: 40%DCP solution (dicumyl peroxide dissolved in 2

2

4-trimethyl-1

3-pentanediol diisobutyrate). Experiments were performed with two devices

differential scanning calorimeter (DSC) and vent sizing package 2 (VSP2)

analyzed the kinetics by TSS (Thermal Safety Software) and established two decomposition models: model 1 “N-order followed with N-order” and model 2 “N-order followed with autocatalysis”

then

the kinetic parameters were estimated by Friedman method and non-linear simulation method. From simulated curves

both models described the decomposition curve for dynamic calorimetry mode or adiabatic calorimetry mode well

which illustrated the limitation of kinetics study for single calorimetric mode. Therefore

paper proposed a method that estimated the parameters based on both dynamic calorimetry mode and adiabatic calorimetry mode decomposition curves

found that only model 1 explained the decomposition well. Therefore

40%DCP decomposition can be expressed as model 1

in which the activation energy for two steps are 115.5 kJ·mol-1 and 135.7 kJ·mol-1

the natural logarithm of pro-exponential factor are 28.3 and 31.6

and reaction order are 0.40 and 0.84. This study proved that estimation of kinetic parameters with two different calorimetry modes can help determine right kinetic model

obtain accurate kinetic parameters

and overcome the limitation of kinetics study with single calorimetric mode.