Research on the properties of BPN in a high temperature environment

DOI:	10.11809/bqzbgcxb2023.08.032
Keywords:	BPN; thermal decomposition; thermal stability; pyrotechnic reagent; high temperature resistance
Abstract:	Aiming at the thermal stability and output performance evaluation of BPN in the aerospace field in high temperature environments, this paper carries out appearance and morphology analysis, TG analysis, DSC analysis and output power tests on key components BPN agents and BPN agents with different ratios before and after high temperature tests at 180 ℃ for 2 days and 5 days. It also obtains the thermal reaction history of KNO3, boron powder and different ratios of BPN. The experiments show that, before 500 ℃, KNO3 transcrystallization (132 ℃) and melting (332 ℃) form. In the temperature range from the melting point (332 ℃) to 500 ℃, KNO3 is melting but not decomposed or vaporized, and it is stable in a melting state. With an increase of boron content, the decomposition peak temperature gradually decreases, and the initial reaction temperature of BPN is about 50 ℃ earlier than that of KNO3. Unsaturated polyester resin adhesives are superior to fluororubber adhesives. Binder free BPN and unsaturated polyester resin BPN have good high temperature stability, which have good application value in space missions.
Published:	2023-08-28
PDF HTML