Insight of Enhancing Energy-Release Properties of High-Energy DAN-2/B Based Ignition Powder by Using Fluorinated Polymer

[(H 2 dabco)K(NO 3 ) 3 ]/Boron (DAN-2/B) composites have garnered much attention as novel high-energy ignition powder due to its high energy and favorable safety characteristics. Meanwhile, tailor energy-release properties of DAN-2/B composites through the introduction of functional adhesives is of considerable importance. In this work, three different polymer adhesives, including in the ethylene-vinyl acetate copolymer (EVA), thermoplastic polyester amine (Estane 5703), and fluorinated polymer(F 2602 ), were employed to design and prepare the ternary ignition powder composites by the solvent evaporation method. The morphology and structure of the ternary ignition powder composites were analyzed, and their thermal decomposition and combustion performances were investigated by regulating the components and content. The results indicate that the incorporation of the fluorinated polymer F 2602 significantly enhanced the energy-release properties of DAN-2/B-based ternary composites. F 2602 not only effectively bonds DAN-2 and amorphous boron into uniform granular microparticles, but also improves the ignition and combustion performance of DAN-2/B. The DAN-2/B-20/F 2602 -3 exhibited higher combustion performances, including maximum the combustion peak pressure of 210.7 kPa, highest heat of reaction of 4216 J·g −1 , and a prolonged combustion duration of 2402 ms. The pre-ignition and combustion reaction mechanism of the DAN-2/B with fluorinated polymer F 2602 added was proposed. This study is beneficial for optimizing the ignition performance of DAN-2/B-based ignition powder composites, with the aim of improving its energy-release efficiency and promoting its engineering applications. • Polymer adhesives are used in the design of DAN-2/ B-based ignition powder • DAN-2/B/F2602 ignition powder formulations exhibited enhanced high energy properties • The pre-ignition and combustion reaction mechanism of DAN-2/B-based ignition powder composites were proposed