【摘要】 以四氢硼酸四乙基铵为原料,通过热解反应合成了十氢十硼酸双四乙基铵,并采用红外光谱(IR),核磁共振波谱(1H NMR,11B NMR)及元素分析对其结构进行了表征.采用差热-热重(DSC-TG)分析研究了其在氩气及氧气气氛下的热稳定性,发现其在氩气中仅发生热分解反应,放热量较小,而在氧气中则先分解,再发生氧化反应并放出大量的热.采用Kissinger方法及Coat-redfern方程得到其热分解主反应的动力学方程,并进一步通过热裂解原位池-傅里叶变换红外光谱(FTIR)联用技术和同步热分析-红外-质谱(DSC-TGFTIR-MS)联用技术研究了其热分解机理,推测在加热升温过程中,化合物在303.2℃下快速分解,气相产物主要为乙烷与少量氨气及氢气,固相产物为单质硼.更多还原

【Abstract】 As a promising burning rate modifier of propellents,the boron hydride salt [( C2H5)4N]2B10H10was synthesized by the pyrolysis of tetraethylammonium borohydride and characterized by IR,1H NMR,11 B NMR and elementary analysis. The thermal stabilities in Ar or in O2 were investigated by DSC and TG.The results showed that it decomposed with less heat release in Ar. But in O2,it decomposed at first then was oxided with more heat release. The kinetic equation of thermal decomposition reaction was obtained by Kissinger method and Coat-Redfern program. Using combined solid reaction cell in-situ and FTIR,DSC-TG-FTRIMS simultaneous techniques,thermal decomposition mechanism was supposed,the compound decomposes at303. 2 ℃,and produces C2H6,NH3,H2 and B.更多还原