Abstract
Programmed heating measurements were performed by differential scanning calorimeter (DSC) to obtain thermal parameters. The expression of the optimal kinetic mechanism model for the thermal behaviors of dicyclohexylmethane-4,4′-diisocyanate (HMDI) under the five heating rates is f(α)=α0.41(1−α)0.93 by fitting DSC curves. The thermal behaviors under adiabatic conditions and the time to conversion limit (TCL) were further simulated based on kinetic parameters to provide effective safety information concerning HMDI. Estimation of time to maximum rate under adiabatic conditions (TMRad) indicated that the temperature should not be too high by reference to TD24 = 230.95 °C during the production and storage. For 14 % limit value, TCL requires 7 d when the material reaches its maximal rate at 211.15 °C, while it just only 1 d at 236.90 °C.
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