Abstract
Dynamic experiments were performed by differential scanning calorimeter (DSC) to obtain thermodynamic parameters to evaluate the thermal hazards of isophorone diisocyanante (IPDI). The apparent activation energy was calculated by the isoconversional Friedman method. And the kinetic model was evaluated by fitting experimental curves, which consisted of two stages: the initiation stage of the n-order type, and the autocatalytic stage. Furthermore, thermal behaviors under isothermal and adiabatic conditions were simulated, and the results indicated that a large amount of thermal energy was released. Estimation of time to maximum rate under adiabatic conditions (TMRad) demonstrated that the operational temperature should not exceed 223.64±0.30°C during production and operation. For a limit value of 10%, the time to conversion limit of IPDI is 11.36 d with an error of less than 0.66 at 200°C, while it only took within 0.1 d at 260°C.
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