Preparation of B^AP Composite Particles and Their Effects on Rheological Properties of HTPB/B/AP Slurries

Composite particles (B^AP) of boron (B) coated with ammonium perchlorate (AP) were prepared by recrystallization and their structures were characterized using Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and laser particle size analyses. The results indicated that AP was well coated on the boron surface. The effects of different contents of B^AP coated with different amounts of AP on the rheological properties of HTPB/B/AP composite slurries were also studied. The results show that addition of B^AP distinctly decreased the slurries' viscosities and improved their processing properties, which were more obvious when 9.73% AP was coated on the surface of boron and the amount of B^AP was 20%.