Study of LLM-105 porous spherulites: preparation, characterization and crystallization mechanism

Abstract. Two kinds of porous spherulites LLM-105 constructed by different nano-units were successfully prepared by adjusting the concentration and molecular weight of PVP. The XRD and FT-IR results show that both LLM-105 have the same crystalline and molecular structure, despite having different morphologies. The results show that porous spherulites can significantly improve the initiation and detonation performance of LLM-105 due to the special multi-stage structure. According to MS simulation, it is found that changing the molecular weight and concentration of PVP can effectively adjust the bond strength with each crystal plane of LLM-105, which makes the growth rate of LLM-105 crystal differ greatly along the axial and radial directions, and finally affects the morphology of LLM-105 crystal. Based on this, the formation mechanism of porous spherulites is proposed.