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为改善相稳定硝酸铵(PSAN)的吸湿性和表面极性,选择乙二胺、二乙胺和三乙胺,分别代表伯、仲和叔胺化合物,与PSAN颗粒表面反应,制备反应型包覆PSAN。FTIR证实,乙二胺、二乙胺和三乙胺与AN均能发生化学反应。通过吸湿率、接触角测量和推进剂拉伸实验,对包覆效果进行了表征。结果表明,二乙胺反应型包覆的PSAN吸湿性和表面极性改善效果最好,相对湿度为75.3%和92.5%两种环境下,8 h吸湿率分别下降了60.5%和63.6%,表面自由能极性分量下降了约91%,非极性分量增加了约145%;而乙二胺反应型包覆PSAN对BAMO-THF/PSAN推进剂力学性能改善效果最好,乙二胺包覆量为0.2%时,推进剂的最大应力σm取得最大值,σm提高了约46%,最大应力下延伸率εm提高了约83%。
To improve the hygroscopicity and surface polarity of phase-stable ammonium nitrate (PSAN), ethylenediamine, diethylamine and triethylamine were selected to represent the primary, secondary and tertiary amine compounds, respectively, to react with the surface of PSAN particles to prepare reactive packs Cover PSAN. FTIR confirmed that ethylenediamine, diethylamine and triethylamine and AN can occur chemical reaction. The coating effect was characterized by moisture absorption rate, contact angle measurement and propellant tensile test. The results showed that the PSAN hygroscopicity and surface polarity of DEA coated with diethylamine were the best, the moisture absorption rate of 8 h decreased by 60.5% and 63.6% under the relative humidity of 75.3% and 92.5% Polar component of free energy decreased by about 91% and non-polar component increased by about 145%. However, ethylenediamine reactive coated PSAN had the best effect on the mechanical properties of BAMO-THF / PSAN propellants, The maximum stress, σm, of the propellant was maximized at 0.2%, the σm increased by about 46% and the elongation at maximum stress εm increased by about 83%.