High Performance Thermoplastic Energetic Composites Using Fluorinated Energetic Polyurethanes as Binder

Abstract

The performance of energetic composite materials is largely dependent on the energy level and combustion process. The fluorine‐containing energetic polyurethanes as binder can facilitate the combustion of metallic fuels and enhance the energy level of the energetic composites. In the current report, two kinds of thermoplastic energetic composites are prepared, based on novel fluorine‐containing energetic polyurethanes as binder and also with aluminum nanoparticles (AlNPs) and ammonium perchlorate (AP). Compared with the energetic composites with fluorine‐free energetic polyurethane binder, despite the very low fluorine content, the fluorine‐containing energetic composites not only showed higher density, lower mechanical sensitivity, much higher mechanical toughness, but also a significantly improved combustion efficiency and combustion rate of the AlNPs.

Effect of Fluoroalcohol Chain Extension Modified HTPB Binder on the Combustion Performance of Aluminized Propellants

“…However, Al powder tends to form a large condensed phase with the molten alumina (Al 2 O 3 ) generated during combustion, resulting in incomplete combustion of the Al and causing decreased combustion performance of solid rocket propellant. Moreover, these condensed phases will cause serious erosion of the insulation layer within the propellant combustion chamber and the nozzle components [12,13].…”