To obtain a better understanding of the thermal decomposition properties of energetic compositions of guanidine nitrate (GN) and azodicarbonamide (ADCA), differential scanning calorimetry (DSC) and thermogravimetry-differential thermal analysis connected with infrared spectroscopy (TG-DTA-IR) and with mass spectrometry (TG-DTA-MS) were carried out, and the onset temperature, heat of decomposition and evolved gas were determined. Furthermore, residue of thermal decomposition at various conditions was identified with Fourier transformation infrared spectroscopy (FT-IR) analysis. Experimental results suggested that the thermal decomposition of GN proceeded with the balance between the rates of vaporization and decomposition above a certain temperature and evolved gas products of thermal decomposition of GN/ADCA compositions are influenced by the mixing ratio.
硝酸グアニジン(GN)とアゾジカルボンアミド(ADCA)よりなる組成物の熱分解特性を検討するため,示差走査熱量測定(DSC),熱重量示差熱-赤外分光分析同時測定(TG-DTA-IR)および熱重量示差熱-質量分析同時測定(TG-DTAMS)を用いて熱分解時の発熱開始温度,発熱量ならびに生成ガスの分析を行った。 さらに,各測定条件における熱分解残留物をフーリエ変換赤外分光分析により同定した。 これらの結果から,GNの熱分解過程はある温度以上において気化と分解の割合に依存し,GN/ADCA組成物の熱分解生成ガスは組成比に大きく影響を受け,変化することが明らかとなった。
thermal decomposition, guanidine nitrate, azodicarbonamide, gas analysis