In order to investigate the heat release behaviors of nitroglycerine (NG), the thermal analysis of NG was performed under the heating condition and the isothermal conditions in various atmospheres. Under the heating condition, two heat releases of NG were observed at approximately 416 K and 436 K in the presence of O2. The amount of heat release at the lower temperature was dependent on the partial pressure of O2. In N2, no heat release was observed around those temperature ranges. Even in a 4 vol. % NO2 / N2 atmosphere, no heat release was observed at that temperature. On the other hand, in 4 vol. % NO2 / air, large heat release was observed at approximately 387 K. Under the isothermal condition, the induction period was shortened in the presence of O2. The induction period in 4 vol. NO2 / air was shorter than that in air and the induction period in 4 vol. NO2 / N2 was shorter than that in N2. NO2 in the presence of O2 contributed to decomposition of NG more than NO2 in the absence of O2.
ニトログリセリン（NG）の自然発火挙動を把握するために様々な雰囲気中，昇温および等温条件で熱分析を行った。昇温測定ではO2存在下で416 K，436 K付近でそれぞれ発熱ピークが得られ，低温側ピークの発熱量はO2分圧に依存した。一方，N2雰囲気では416 K付近に発熱ピークは観察されなかった。NO2 / N2雰囲気でもその温度付近では発熱ピークは観察されなかったが，NO2 /空気雰囲気では387 K付近に大きな発熱ピークが観測された。等温測定ではO2が存在する雰囲気では誘導期が短くなった。また，NO2 /空気雰囲気の誘導期は空気雰囲気より短くなり，NO2 / N2雰囲気の誘導期はN2雰囲気の誘導期より短くなった。このことよりNO2はNGの分解を促進するが，O2と共存するとNO2単独よりもより分解を促進することがわかった。
Self ignition, Spontaneous ignition, Nitric ester, Nitric acid ester