物理化学学报 >> 2009, Vol. 25 >> Issue (05): 981-986.doi: 10.3866/PKU.WHXB20090525

研究论文 上一篇    下一篇

六硝基六氮杂异伍兹烷及其残余物的热分解

董林茂 李晓东 杨荣杰   

  1. 北京理工大学材料科学与工程学院, 北京 100081
  • 收稿日期:2009-01-22 修回日期:2009-03-02 发布日期:2009-05-04
  • 通讯作者: 杨荣杰 E-mail:yrj@bit.edu.cn

Thermal Decomposition of Hexanitrohexaazaisowurtzitane and Its Residues

DONG Lin-Mao, LI Xiao-Dong, YANG Rong-Jie   

  1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
  • Received:2009-01-22 Revised:2009-03-02 Published:2009-05-04
  • Contact: YANG Rong-Jie E-mail:yrj@bit.edu.cn

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摘要：

在(2.0±0.1) MPa氩气氛围下六硝基六氮杂异伍兹烷(HNIW)在(204.0±0.5)、(208.0±0.5)、(212.0±0.5)和(216.0±0.5) ℃下分别加热10、20、30、40、50 和60 min. 采用元素分析、扫描电子显微镜(SEM)、傅立叶变换红外(FTIR)光谱仪、差示扫描量热(DSC)仪、热重-差示扫描量热仪-质谱(TG-DSC-MS)仪和热重-红外(TG-FTIR)仪对(208.0±0.5) ℃下得到的残余物进行研究. 结果表明, HNIW离子在210.0 ℃左右恒温热解60 min 后, 残余物的组成为C2H2N2O. 残余物中未分解的HNIW比初始HNIW稳定性差. 在等温条件下, HNIW是逐步分解的. HNIW残余物的热分解分为三个阶段, 第一个分解阶段主要为未分解的HNIW的热分解, 第二阶段主要为五员环硝铵和碳氮杂环化合物的分解反应, 第三阶段主要为五员环硝铵的分解反应和NO2的二次反应, 并获得了每一个阶段的热分解产物.

关键词: 六硝基六氮杂异伍兹烷, 热分解, 残余物, TG-DSC-MS, TG-FTIR, FTIR

Abstract:

Hexanitrohexaazaisowurtzitane (HNIW) particles were heated isothermally at (204.0±0.5), (208.0±0.5), (212.0±0.5), and (216.0±0.5) ℃for 10, 20, 30, 40, 50, and 60 min under (2.0±0.1) MPa pressure in an argon atmosphere. Residues obtained at (208.0±0.5) ℃were studied by elemental analysis, scanning electron microscopy (SEM), Fourier transforminfrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetry-differential scanning calorimetry-mass spectrometry (TG-DSC-MS) and thermogravimetry-Fourier transforminfrared (TG-FTIR) spectroscopy. Results showed that after isothermal decomposition of HNIW crystals at about 210.0 ℃for 60 min residues were formed with an average molecular formula of C2H2N2O. Unreacted HNIW is present in the residue and is more thermally unstable than the original HNIW. We confirmed that HNIWcrystals decomposed stepwise under isothermal conditions. Three stages were found to exist during the thermal decomposition of HNIW residues. The first decomposition stage consists of an initial decomposition of unreacted HNIW, the second stage comprises an elimination reaction of five-membered ring amides and nitrogen heterocyclic compounds and in the third stage five-membered ring amides are degraded and secondary reactions involving NO2 occur. The main gaseous products in every stage are discussed.

Key words: Hexanitrohexaazaisowurtzitane, Thermal decomposition, Residue, TG-DSC-MS, TG-FTIR, FTIR