Unique thermal and combustion behaviors of composite propellants containing a high-energy insensitive nitropyrimidine derivative

Owing to the novel insensitive high-energy-density material 2,4,6-triamino-5-nitropyrimidine-1,3-dioxide (ICM-102) has lower sensitivity and higher energy(see in Table S1, Supporting Information), it has great advantages in the application of low-vulnerability propellants. In this paper, the evaluation of ICM-102containing composite propellants has been carried out, where the decomposition and combustion performances of these propellants have been comprehensively investigated. It has been shown that the main exothermic decomposition peak temperature can be increased from 235 4C to 350 4C, when 6 to 10 wt% of ICM-102 was used to replace RDX, but heat release rate was largely increased. Moreover, the burning rate of ICM-102 containing propellants at 3 MPa is in the range of 6.97-7.75 mm center dot s - 1, depending on its content. The pressure exponent (0.5-3 MPa) is between 0.34-0.4 4. Compared with the typical propellants with RDX, the burn rate and the flame temperature of ICM-102- containing propellants are higher. In addition, the particle size distributions of condensed combustion products of ICM-102 propellants are narrower and smaller than that of RDX-based one. It also shows that extra products such as aluminum carbide (Al20C) and aluminum oxide nitride (Al5O6N) were produced once ICM-102 was used. (c) 2021 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Automated summary

The novel insensitive high-energy-density material ICM-102 shows lower sensitivity and higher energy, making it suitable for low-vulnerability propellants. It increases peak decomposition temperature and burning rate of propellants, with narrower and smaller particle size distributions of combustion products compared to RDX-based propellants.