卡托辛对AP热分解影响的XPS研究

采用XPS方法研究了卡托辛对复合固体推进剂氧化剂AP热分解过程的作用机理。结果表明,热氧化后Fe原子的结合能向高位移动,再根据Fe2p3/2谱强度的变化,说明卡托辛在AP热分解过程中是逐渐氧化过程,Fe—C共轭键逐渐断裂;Cl原子的结合能向低位移动,且在200 eV左右出现低结合能的峰,同时其强度逐渐增大,Cl原子在200 eV处形成的低结合能态的可能途径是卡托辛的分解产物环戊二烯离子与HClO4的分解产物HCl发生反应,加速了HClO4的分解速度;卡托辛的二茂铁基夹心结构破坏后生成的Fe2O3具有较高的反应活性,亦加速AP离解产物HClO4的分解速度。

Study on effects of catocene on thermaldecomposition of AP by XPS

The mechanisms of catocene on thermal decomposition process of AP as oxidizer in composite solid propellant were studied by XPS.Results show binding energy of iron increased after thermal oxidation.Catocene was oxidized during thermal decomposition process of AP and Fe—C conjugate bond was broken gradually according to spectral intensity change of Fe2p3/2.Binding energy of chlorin decreased and low binding energy reductive peaks appeared at about 200 eV and intensity of the peaks increased gradually.The possibility approach of forming the binding state of chlorin at about 200 eV was catocene resulting decomposition of cyclopentadiene ion reacted with HClO4 resulting decomposition of HCl,and accelerated decomposition rate of HClO4.Ferrocene-based sandwich structure of catocene destroyed and was oxidized to form Fe2O3,which is more active,and could accelerate decomposition rate of HClO4,the dissociation products of AP.