Abstract: To solve the surface-deterred problem of high-energy propellant with high plasticizer concentration, a small-molecule multiple alkynyl compound, such as Tripropargyl 1,3,5-benzenetricarboxylate(TPTM), is introduced as deterrent precursor. It could react with 1,5-diazido-3-nitrazapentane(DIANP) which is a ingredient of azidonitramine propellant to form high-molecule deterrent with cross-linked network structure after it is permeated into surface layer of azidonitramine propellant with spraying technique. The deterring effects are characterized by closed-bomb test and thermal-aging test. The results show that TPTM can reacts with DIANP at 50 ℃ completely. When the azidonitramine propellant is deterred with TPTM, the initial burning activity of the deterred propellant is substantially reduced, its progressive burning characteristic value L_m/L₀ reaches about 1.8 and B_m is about 0.5; and the combustion performance of the deterred propellant is ultimately unchanged after thermal-aging at 50 ℃ for six month. The small-molecule multiple alkynyl compound as deterrent precursor is applicable to the surface deterring of azidonitramine propellant, makes the deterring effect excellent and insures the long-storage stability.

Key words: ordnance science and technology, high-energy propellant, surface deterrent, combustion performance, 1,5-diazido-3-nitrazapentane, multiple alkynyl compound