Abstract
In order to prevent accidents involving fire and explosions due to the accumulation of heat during the selfdecomposition of stored chemical materials, it is important to understand the thermal behavior of stored materials under an adiabatic condition. Recently, a differential-type adiabatic calorimeter (DARC) has been developed. However, the application range of the DARC in a thermal hazard evaluation is not fully understood. Therefore, in order to understand the application range of a DARC in a thermal hazard evaluation, the thermal behavior of di-tert-butyl peroxide (DTBP)-toluene solution and DTBP decomposition were measured. The results measured by the DARC were compared with those of an Accelerating Rate Calorimeter (ARC). As a result, the DARC is considered to be effective in a thermal hazard evaluation for a small exothermic reaction of less than 100 J/g, which is difficult to evaluate by ARC. In contrast, a DARC should not be used for the thermal hazard evaluation of the material that has a large reaction heat and vapor pressure.
