Guo Song, Wang Qingsong, Sun Jinhua, Liao Xin, Wang Ze-shan
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, People's Republic of China.
J Hazard Mater. 2009 Aug 30;168(1):536-41. doi: 10.1016/j.jhazmat.2009.02.073. Epub 2009 Feb 23.
This paper studies the influence of moisture content on the thermal stabilities of double-base propellant and multi-nitro ester propellant. The thermal behaviors and chemical kinetic parameters of the above two propellants and their mixtures with water were analyzed by using a CALVET heat flux calorimeter, C80. The thermal decomposition mechanisms of these two propellants with water were conjectured based on the tests. And then, the self-accelerating decomposition temperatures (SADT) of these two propellants and their mixtures with water were calculated and compared according to the kinetic parameters and Semenov model. The results show that the thermal decomposition mechanism of double-base propellant with water may be changing with the varying moisture content by transferring hydrogen proton (H(+)). However, the thermal decomposition mechanism of multi-nitro ester propellant with water may be unchanging due to the excess of formaldehyde (HCHO). Water plays the external physical factor on the thermal decomposition of multi-nitro ester propellant, and it plays both the physical and the chemical factors on the thermal decomposition of double-base propellant. The SADTs of their mixtures with water are much lower than that of pure propellants, and keep decreasing with the increasing of moisture content.
本文研究了含水量对双基推进剂和多硝基酯推进剂热稳定性的影响。采用C80型卡氏量热仪分析了上述两种推进剂及其与水的混合物的热行为和化学动力学参数。基于试验推测了这两种推进剂与水作用时的热分解机理。然后，根据动力学参数和谢苗诺夫模型计算并比较了这两种推进剂及其与水的混合物的自加速分解温度（SADT）。结果表明，双基推进剂与水作用时的热分解机理可能会随着含水量的变化通过转移氢离子（H(+)）而改变。然而，由于甲醛（HCHO）过量，多硝基酯推进剂与水作用时的热分解机理可能不变。水在多硝基酯推进剂热分解过程中起外部物理因素的作用，而在双基推进剂热分解过程中既起物理因素又起化学因素的作用。它们与水的混合物的SADT远低于纯推进剂的SADT，且随含水量的增加而不断降低。
