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以新型高氮化合物3,6-双(1-氢-1,2,3,4-四唑-5-氨基)-1,2,4,5-四嗪(BTATz)取代RDX制得了BTATz-CMDB推进剂试样,获得了燃速结果,并利用TG-DTG,PDSC,单幅照相、燃烧波温度分布和熄火表面形貌及元素含量测试技术对推进剂的热分解特性及燃烧特性进行了系统研究。结果发现,BTATz的氧平衡值较低,用其取代双基推进剂中的NC和NG后,推进剂的各能量特性参量出现不同程度的降低,因此,BTATz在推进剂中的含量不宜太高。BTATz-CMDB推进剂适用于常规无溶剂成型工艺进行制造;BTATz在燃速提升方面具有突出潜力,尤其在对推进剂主放热反应催化加速的催化体系(邻苯二甲酸铅、己二酸铜和炭黑的混合物)作用下,燃速提升效果更加明显;BTATz-CMDB推进剂燃烧时的火焰符合双基系推进剂火焰的一般特征,但由于BTATz不存在类似RDX那样的熔融过程,该类推进剂燃烧产生了发散火焰束,燃烧表面由熔融状变为疏松珊瑚状,火焰强度增强;随着压强升高,燃烧表面产生发散火焰束的活性点增多,暗区迅速变薄,增加了火焰区向燃烧表面的热反馈,加速了燃烧反应;催化体系对推进剂燃烧反应的气相区影响不大,它加强了凝聚相及表面附近的放热反应,改变了推进剂燃烧表面的结构,在推进剂燃烧过程中,催化剂(新生态)在推进剂的燃烧表面富集,催化了推进剂的分解和燃烧,促进了推进剂燃速的提高。
The new high nitrogen compound 3,6-bis (1-hydro-1,2,3,4-tetrazolium-5-amino) -1,2,4,5-tetrazine (BTATz) substituted RDX BTATz- CMDB propellant samples were obtained. The pyrolysis characteristics and combustion characteristics of the propellants were also studied by TG-DTG, PDSC, single-image, temperature distribution of the combustion wave, flameout surface topography and elemental content testing system Research. The results showed that BTATz had a lower oxygen balance value. After replacing NC and NG in the double-base propellants, the energy parameters of the propellants decreased to different extents. Therefore, the content of BTATz in the propellants should not be too high . BTATz-CMDB propellants are suitable for use in conventional solvent-free molding processes. BTATz has outstanding potential for improving fuel burn rate, especially in catalytic systems that catalyze the main exothermic reaction of propellants (lead phthalate, copper adipate And carbon black), the burning rate of BTATz-CMDB propellant is in line with the general characteristics of birefringent flame, but because BTATz does not have the melting process similar to RDX, As the pressure increases, the active sites on the combustion surface that generate divergent flame bundles increase, the dark areas rapidly become thinner, and the flame grows. As the pressure increases, the combustion surface produces divergent flame bundles, which change from molten into loose coral- The thermal feedback to the combustion surface accelerates the combustion reaction. The catalytic system has little effect on the gas phase of the propellant combustion reaction. It enhances the condensation phase and the exothermic reaction near the surface, and changes the structure of the combustion surface of the propellant. In the process of propellant combustion, the catalyst (neo-ecology) is enriched on the combustion surface of the propellant, catalyzing the decomposition and combustion of the propellant and promoting the increase of the burning rate of the propellant.