含黑索今酮的火药热分解及燃烧性能研究

用ＤＳＣ技术考察了７种含黑索今酮（Ｋｅｔｏ－ＲＤＸ）火药的热分解特性，并对其中３种进行了密闭爆发器测试。将ＤＳＣ数据对动力学方程进行拟合以求得动力学参数。从密闭爆发器测试结果转换得到了该３种火药的燃速－压力曲线，并对其进行了转折性分析。结果表明，向火药中加入Ｋｅｔｏ－ＲＤＸ可提高火药燃速并降低其热分解表观活化能。含Ｋｅｔｏ－ＲＤＸ的火药其燃速压力指数在低压区较在高压区为高。在火药中同时存在有Ｋｅｔｏ－ＲＤＸ和ＲＤＸ对火药热分解和燃烧的稳定性是不利的。仅由Ｋｅｔｏ－ＲＤＸ与双基粘结剂组成的火药，其燃速压力指数较由ＲＤＸ与双基粘结剂组成的火药为低。

Thermal Decomposition and Combustion Properties of Keto RDX Propellant

The thermal decomposition properties of 7 propellants which contain Keto RDX (2,4,6 trinitro 2,4,6 triazacyclohexanone) are investigated by DSC technique. Closed bomb tests are also done on 3 of them. The DSC data are fitted to kinetic equations to get kinetic parameters(E a, A,n). Burning rate pressure(u P) curves of the 3 propellants are calculated from the closed bomb test data. Turning analysis is carried out on the u P curves. The result shows that adding Keto RDX to propellants can raise the burning rates of the propellants and lower their apparent activation energies(E a) of thermal decomposition. The burning rate pressure exponent (v) of propellants containint Keto RDX is higher in low pressure region than that in high pressure region. Presence of Keto RDX and RDX simultaneously in a propellant is disadvantageous to the stability of thermal decomposition and combustion of the propellant. Propellant composed of Keto RDX and double based binder has lower burning rate pressure exponent than propellant composed of RDX and double based binder. The pressure exponent may less than 1.0.