Energetic polymeric binders are widely used in industrial and military fields. Meanwhile, fluorinated components in polymeric binders can facilitate the combustion of metallic fuels, energetic polymers are usually preferred for their high energetic content. Therefore, a combination of these two in one polymer binder is expected to be an excellent candidate for high-performance energetic composites. In the current report, a series of energetic and fluorinated polyurethanes (FPUs) based on glycidyl azide polymer (GAP) and fluorinated chain extenders were prepared by a one-pot facile strategy. More significantly, compared with the energetic polyurethane without fluorine, FPUs not only showed a remarkably improved the mechanical properties, but also, surprisingly, an enhancement in the heat of explosion, despite the low content of fluorine.
Gang Tang,He Wang,Chunyan Chen,Yabei Xu,Dongping Chen,Dongli Wang,Yunjun Luo,Xiaoyu Li
Energetic composites composed of polymeric binders and metallic fuels are widely used in industrial and military fields, and their performance is largely dependent on the combustion process. Fluorinated energetic polymeric binders can facilitate the combustion of metallic fuels such as aluminum particles and enhance the energetic level of the energetic composites. In this report, fluorinated energetic polyurethanes (FPUs) were applied as binders for energetic composites with aluminum nanoparticles (AlNPs). The fluorinated components in the energetic binder could be a uniform dispersion inside the composites, endowing the composites with decent mechanical properties and high combustion rate. Most significantly, compared with the composites without fluorine, FPU/AlNP energetic composites not only showed a remarkably improved combustion efficiency, but also, surprisingly, a dramatic enhancement in the heat of explosion by 91.2%, despite the low content of fluorine. By analyzing the combustion products together with kinetic simulations derived from chemical reaction neural network (CRNN) modelling, a detailed mechanistic understanding of the combustion process was provided, suggesting the importance of synergistic effects brought by the fluorinated and energetic components.
危险品化学品经营许可证（带存储）