Science and Technology of Energetic Materials

Vol.74, No.6 (2013)

Research paper

Evaluation of thermal decomposition hazards by differential adiabatic calorimeter
Yusaku Iwata


A differential adiabatic calorimeter is newly developed as the calorimeter which can estimate the thermal decomposition hazards of chemicals in the adiabatic condition that the phi-factor is equal to one. It is regarded that the adiabatic temperature rise measured by its calorimeter does not depend on the sample mass experimentally. There is a possibility that it becomes to the useful tool to estimate the hazards of the self-reactive substances. However, its propriety of the data measured by its calorimeter is not so known and familiar in the field of the hazardous evaluation of chemicals. In this report, the measurement results by its calorimeter are investigated with di-tert butylperoxide (DTBP). DTBP is one of the self-reactive substances and used as standard sample of the ARC. Activation energy of DTBP in the thermal decomposition is obtained and is compared with the literature value. The property of DTBP decomposition is investigated by the measurements data. In addition, its calorimeter is applied to the evaluation of the thermal decomposition hazards of the other self-reactive substance. N, N-dinitroso pentamethylene tetramine (DPT) is one of the blowing agents which is high reactive material. DPT became the causematerial of some fire accidents in the past. In this report, the heat onset temperature and the activation energy of DPT are measured in the adiabatic condition. The decomposition reaction is discussed on the basis of the measurements data.

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differential adiabatic calorimeter, thermal decomposition, di-tert butylperoxide, N, N-dinitroso pentamethylene tetramine

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