包覆改性RDX及其在CMDB推进剂中的应用？

选用键合剂LBA-1和热塑性弹性体（ TPE）对RDX进行表面包覆改性,并应用于CMDB推进剂中。采用扫描电子显微镜（ SEM）表征了RDX包覆前后颗粒表面的变化情况,同时,分别测试了RDX包覆前后和制备的CMDB推进剂的摩擦感度和撞击感度,并且对含包覆RDX的CMDB推进剂的力学性能和燃烧性能进行了表征。结果表明,经包覆改性后降感效果均明显,其中键合剂包覆的RDX,摩擦感度降低了68％,对应的CMDB推进剂,摩擦感度降低了37.5％。两种材料包覆改性RDX对推进剂的力学性能均有明显的改善,其中经热塑性弹性体包覆改性后,RDX-CMDB推进剂的抗拉强度提高了4.72 MPa,延伸率提高了19.67％；对推进剂的燃烧性能有一定的影响。

Coating of RDX and Its Application in CMDB Propellant

RDX was surface coated and modified with bonding agent LBA-1and thermoplastic elastomer（TPE）, and then was applied in the CMDB propellant. Scanning Electron Microscopy （ SEM） was used to characterize the particle sur-face of RDX before and after coating. The friction and impact sensitivities of the RDX before and after coating and RDX-CMDB propellant were studied. Furthermore, the combustion and mechanical properties of the RDX-CMDB propellant were characterized. The results show that, compared with the uncoated RDX, the friction sensitivity of the coated RDX with bonding agent and corresponding RDX-CMDB reduce by 68% and 37. 5%, respectively. What＇s more, surface coated RDX had a significant effect on the mechanical properties of the propellant. For example, the tensile strength and elongation of the RDX-CMDB were increased by 4. 72 MPa and 19. 67%, respectively, after coating of RDX with thermoplastic elasto-mer;and RDX coated with these two materials also exhibited a certain effect on the combustion properties of the propellant.