AP/HNIW混合体系的热分解研究

Study on thermal decomposition of AP/HNIW mixed systems

采用差示扫描量热–热重(DSC–TG)同步热分析法和热重–红外(TG–FTIR)联用技术,通过研究高氯酸铵/六硝基六氮杂异伍兹烷(AP/HNIW)混合体系的热分解行为,探索了混合体系中AP与HNIW的相互作用。采用Kissinger法计算了AP/HNIW混合体系的热分解动力学参数。结果表明,不同比例的混合体系中HNIW均促进了AP的高温分解,使AP的分解峰由2个变成了1个,分解峰温提高到288℃或285℃。该促进作用与AP和HNIW的质量比(1:1和2:1)无明显相关性。混合体系中HNIW和AP热分解剧烈,并且分解反应完全,气相产物主要为N2O、NO、NO2、CO2和HCOOH。与单独体系相比,混合体系中AP将HNIW的表观分解活化能提高了51 k J/mol,而HNIW对AP低温热分解活化能无明显影响。

The interaction between ammonium perchlorate ammonia（AP） and hexanitrohexaazaisowurtzitane（HNIW） in mixed systems was investigated by studying thermal decomposition behaviors of AP/HNIW mixed systems and using differential scanning calorimetry-thermogravimetry（DSC-TG） synchronous thermal analysis method and thermogravimetry-infrared（TG-FTIR） combined technique. The thermal decomposition kinetic parameters of AP/HNIW mixed systems were calculated by using Kissinger method. The results show that the HNIW in mixed systems with different ratios all promotes the thermal decomposition of AP at high temperature, the decomposition peak of AP changes from two to one, and the decomposition peak temperature increases to 288 ℃ or 285 ℃. Such promotion has no significant correlation with the mass ratio of AP and HNIW（1：1 and 2：1）. The thermal decomposition of HNIW and AP in mixed systems is violent, and the decomposition reaction is complete. The gaseous products mainly include N2 O, NO, NO2, CO2 and HCOOH. The apparent decomposition activation energy of HNIW is increased by 51 k J/mol by AP in mixed systems in comparison with single system, and HNIW has no significant influence on the decomposition activation energy of AP at low temperature.