显微红外光谱法测定改性单基发射药中功能组分的浓度分布

Determination of the Concentration Profile of Functional Components in Modified Single Base Propellant by FTIR Microspectroscopy

采用红外光谱显微技术考察了11/7改性单基发射药中功能组分NA聚酯钝感剂和硝化甘油的浓度分布状态。结果表明,在发射药的近表面,NA聚酯浓度由表及里呈指数规律下降,符合Fick第二定律的扩散模型,扩散深度约220μm;硝化甘油浓度沿药粒径向呈抛物线状分布,扩散深度约320μm。

The concentration profiles of functional components of NA polyester deterrent and nitroglycerine in 11/ 7 modified single base propellant were investigated by FTIR microspectroscopy. The results show that the NA polyester concentration decreases in the near surface of propellant exponentially from the surface inwards, which is in accord with the second Fickian diffusion model, the diffusion depth is about 220μm. The variation curve of nitroglycerine concentration reveals a parabola along radius, the diffusion depth is about 320μm.