The mechanical strength was influenced by the quality of the crystal and interfacial interaction between energetic particles and polymeric binders. In this work, rod-like and hairy-spherical 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105) with a high crystal quality was modified by polydopamine (PDA) and hyperbranched polymers (HBP) grafting. The morphology of modified LLM-105 changed into a rough surface, resulting in the obvious enhancement of surface energies and adhesion work with the fluoropolymer. Further, the thermal behavior was slightly affected after surface modification due to the decomposition latent of PDA and HBP. Owing to the combined e chemical bonding of PDA and interlocking interaction of HBP, the creep resistance and mechanical strength of the modified LLM-105-based polymer bonded explosives (PBXs) were significantly improved, assisted by quantitative analysis of the interfacial strength. This strategy may provide insights to other composites requiring high mechanical performance.

机械强度受晶体质量和高能粒子与聚合物粘合剂之间的界面相互作用的影响。在这项工作中，通过聚多巴胺 (PDA) 和超支化聚合物 (HBP) 接枝改性具有高晶体质量的棒状和毛状球形 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105) . 改性LLM-105的形态变为粗糙的表面，导致表面能和与含氟聚合物的粘附功明显增强。此外，由于 PDA 和 HBP 的分解潜势，表面改性后热行为受到轻微影响。由于PDA的化学键合和HBP的互锁相互作用，改性LLM-105基聚合物键合炸药（PBXs）的抗蠕变性和机械强度显着提高，辅以界面强度的定量分析。这种策略可以为需要高机械性能的其他复合材料提供见解。