关键词: 物理化学；TKX-50；固体推进剂；能量性能

Abstract: In order to explore the feasibility of the application of dihydroxylammonium 5，5’-bistetrazole-1，1’-diolate (TKX-50) in HTPE propellant， the morphology of TKX-50 particles were determined with high grade SEM dynameter. The compatibility of TKX-50 with main compositions of HTPE propellant was investigated by means of DSC and VST， respectively. The effects of different mass fraction of TKX-50 on the energetic characteristics of the propellant were calculated using minimum free energy method. The results show that the morphology of TKX-50 particles are irregular， the particle size distribution is a little not uniform， while the surface of the particles is compact， smooth， and there is no obvious defects. Moreover， there were not obvious interaction between TKX-50 and HTPE， ammonium perchlorate(AP)， aluminum (Al) and 2，4-toluene diisocyanate (TDI)， while there is a little interactions between TKX-50 and cyclotetramethylene tetranitramine (HMX). With increasing the mass fraction of TKX-50 particles， the specific impulse of HTPE propellant increase significantly. When the mass fraction of TKX-50 is 25%， the maximum theoretical specific impulse is 2685.2N·s·kg-1. And the surface of prepared propellant containing 5% and 15% mass fraction of TKX-50 particles are smooth， and the internal sample is uniform and compact， moreover there is no significant defects， such as reacted pores during the preparation， which indicate that TKX-50 can be applied in the HTPE propellant safely.

Key words: Physical chemistry；TKX-50；Solid propellant；Energy characteristic