ABSTRACT
The B2O3 and H3BO3 compounds on the surface of boron will undergo esterification reaction with the hydroxyl in the hydroxyl-terminated polybutadiene binder, which makes the preparation process of fuel-rich propellant severely difficult. Therefore, to improve the rheological properties of boron-based fuel-rich propellant slurry, B2O3 and H3BO3 should be removed or reduced by necessary surface modification. In solid propellant, the size and size distribution of additives have an apparent effect on the performance of propellant. The recent research results show that the agglomerated modification of boron is one of the most important approaches to improve the processing property of boron-based fuel-rich propellant. The density of agglomerated boron particles is closely related to the degree of tightness. The agglomerated boron particles should have enough mechanical robustness to withstand the rolling wear, the loading impact, and gravity as well as various stresses and temperatures during the kneading process of the propellant slurry.
