富勒烯在RDX-CMDB推进剂中的催化机理

Catalytic mechanism of fullerene in RDX-CMDB propellants

采用燃速测试和热分析的方法 ,研究了炭黑、C60 和富勒烯黑三种形式碳类物质对 RDX- CMDB推进剂燃烧性能的影响 ,并用 AM1方法计算了球烯与 NO体系相互作用的能量变化。结果表明 ,C60 和富勒烯黑在提高双基推进剂燃速、增大平台效应范围和降低燃气中 NOx 含量等方面有更显著的作用。从球烯分子的空间结构以及用分子轨道理论对其成键能力所作的分析 ,提出了燃面上 Pbx C60 活性中心催化机理 ,解释了用 C60 及富勒烯黑取代双基推进剂中 Pb- Cu- CB催化体系中的炭黑 。

Through burning rate experiments and thermal analysis, the influence of adding three forms of carbon: carbon black, C 60 and fullerene soot separately in double based propellants was studied By AM1 quantum chemistry method, the system energy change of fullerne and NO interaction was calculated Results show that C 60 and fullerene soot can enhance the burning rate of double based propellants, broaden the plateau region and lower the concentration of NO x in gas products From analysis of molecular structure of fullerene and its bonding ability by molecular orbital theory,the catalytic mechanism of Pb xC 60 active sites was posed to explain why C 60 and fullerene soot have better catalytic effects than carbon black in Pb Cu Carbon black catalytic system in double based propellants