山嵛酸银热分解过程的研究(英文)

Studies of Thermal Decomposition Process of Silver Behenate

利用红外光谱、X-射线衍射、热重-差热分析-质变联用及透射电镜等分析手段,研究了山嵛酸银的热分解过程。红外光谱、X-射线衍射以及热重-差热分析结果表明,加热山嵛酸银产生了复杂的结构变化,其中有2个明显的热转变过程。在138℃左右,山嵛酸银产生了第1个热转变,即分子中烷基链从有序转变为无序状态;在231℃左右产生了第2个热转变,山嵛酸银发生了结构变化,即山嵛酸热分解。山嵛酸银的主要热分解产物是金属银和山嵛酸。热重-差热分析-质镨联用的分析结果表明,山嵛酸银热分解的气态产物为二氧化碳,水,氢气,乙炔及一些小分子烯烃。

The thermal decomposition processes of silver behenate have been studied by infrared spectroscopy （IR）, X-ray diffraction （XRD）, combined thermogravimetry-differential thermal analysis-mass spectrometry （TG-DTA-MS）, transmission electron microscopy （TEM）. The TG-DTA and the higher temperature IR and XRD measurements indicated that complicated structural changes took place while heating silver behenate, but there were two distinct thermal transitions. During the first transition at 138℃, the alkyl chains of silver behenate were transformed from an ordered into a disordered state. During the second transition at about 231 ℃, a structural change took place for silver behenate, which was the decomposition of silver behenate. The major products of the thermal decomposition of silver behenate were metallic silver and behenic acid. The combined TG-MS analysis showed that the gas products of the thermal decomposition of silver behenate were carbon dioxide, water, hydrogen, acetylene and some small molecule alkenes.