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Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (7): 1614-1619.doi: 10.12382/bgxb.2021.0536

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Hygroscopic Properties of Ammonium Dinitroamide-based High Energy Propellant

LI Lei1,2, WANG Yanwei1,2, DANG Li3, WANG Huisi1,2, DU Fang1,2, TAO Bowen1,2, HU Xiang1,2, ZHOU Shuiping1,2, GU Jian1,2   

  1. (1.Science and Technology on Aerospace Chemical Power Laboratory, Xiangyang 441003, Hubei, China;2.Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, Hubei, China;3.Military Representative Office of Rocket Force Equipment Department of PLA in Xiangyang District, Xiangyang 441003, Hubei, China)
  • Online:2022-07-27

Abstract: The hygroscopicity and sensitivity of Ammonium Dinitroamide (ADN) and ADN-based solid propellants were comparatively investigated through the use of balancer, high performance liquid chromatography, and analysis of contact angle for water and mechanical sensitivity. The results showed that the ADN-based high-energy solid propellant samples had strong hygroscopicity. At 25°C and a relative humidity of 75%, a large number of ADN-containing droplets appeared on the surface of the propellant sample, after 72 hours of moisture absorption, and the percentage of weight gain was 9%. The hygroscopicity of the modified ADN-based propellant was significantly reduced with a weight gain of only 0.3%, and no droplets appeared. The analysis indicated that the contact angle of the modified ADN with water increased significantly, from 8° before modification to 78° after modification, resulting in the remarkable reduction of the adsorption of the modified ADN with water molecules in the air. The impact sensitivity of the propellant before and after ADN modification was increased from 8.1 J to 14.3 J, and its friction sensitivity before and after ADN modification was reduced from 60% to 32%. The impact sensitivity and friction sensitivity of the propellant were both apparently improved. The findings of this work is of great referential significance for the application of ADN in solid propellants.

Key words: solidpropellant, ammoniumdinitramide, hygroscopicity, sensitivity

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