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为了研究不同MAPO含量和AP颗粒级配对丁羟推进剂力学性能的影响,设计了系列配方推进剂的单向拉伸和原位动态扫描电镜观测实验。通过从宏观到细观视角的切换,分析了MPAO含量和AP级配对推进剂力学性能可能的影响机理。研究结果表明,MAPO对推进剂力学性能的改善机理体现在其对基体和界面两方面的作用,MAPO加入与否比MAPO含量多少对推进剂力学性能影响更大;相同体积分数下的不同AP级配对推进剂初始模量影响不大,合理的AP级配可有效提高推进剂的拉伸强度。文中研究为进一步的机理研究奠定了实验基础。
In order to study the effect of different MAPO content and AP particle size distribution on the mechanical properties of the THP propellants, the uniaxial tensile test and in situ dynamic scanning electron microscopy (SEM) observations of the propellants were designed. Through the switch from macroscopic to microscopic perspective, the possible influence mechanism of MPAO content and mechanical properties of AP-grade paired propellants was analyzed. The results show that the improvement mechanism of MAPO on the mechanical properties of propellants manifests in both the matrix and the interface. Whether MAPO is added or not has more influence on the mechanical properties of the propellants than that of MAPO. Different APs with the same volume fraction The initial modulus of the paired propellants has little effect, and reasonable AP grading can effectively improve the tensile strength of the propellants. The research in this paper has laid the experimental foundation for further mechanism research.