关键词: 分析化学 , 六硝基六氮杂异伍兹烷 , 燃速压力指数 , 热分解 , 燃烧

Abstract: Catalyst of the organo-metallic compound (UME) on the combustion and thermal decomposi- tion of HNIW monopropellant was investigated through burning rate measurement, DSC and TG thermal analysis. It is shown that OME can increase the burning rate of HNIW at low pressures, but decrease it at higher pressures. Consequently, OME reduces the exponent for the dependence of the burning rate on pres?sure for HNIW. DSC and TG tests for HNIW and HNIW + OME were carried out at different heating rates. Kinetic analysis for DSC and TG data shows that OME accelerates the initial thermal decomposition of HNIW，but increases the activation energy of the upper thermal decomposition of HNIW. The relation between combustion properties and thermal decomposition characteristics of HNIW were established. It is considered that combustion of HNIW under low and high pressures are controlled by the initial and upper thermal decomposition, respectively.

Key words: analytical chemistry , hexanitrohexaazaisowurtzitane , exponent for the dependence of burn?ing rate on pressure , thermal decomposition , combustion