Ceramic Precursor Aluminum-Containing Polycarbosilane: Preparation and Structure

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• 作者：Yuxi Yu and Xueyuan Tang
• 关键词：Ceramic precursor ; Polycarbosilane ; Aluminium acetylacetonate
• 刊名：Journal of Inorganic and Organometallic Polymers and Materials
• 出版年：2009
• 出版时间：September, 2009
• 年：2009
• 卷：19
• 期：3
• 页码：389-394
• 全文大小：369.0 KB

文摘

The aluminum-containing polycarbosilane (Al-PCS) with various quantities of aluminum was obtained by adding aluminium acetylacetonate (Al(AcAc)₃) as an aluminum source to polysilacarbosilane (PSCS). Subsequently, thermal decomposition and condensation at various conditions were carried out. The molecular weight ( [`(\textMn)] ), [`(\textMn)] \left( {\overline{\text{Mn}} } \right),\,\overline{\text{Mn}} distribution, yield and softening point of the resulting Al-PCS differ with the Al(AcAc)₃:PSCS weight ratio, the thermolysis temperature and the reaction time. The larger the Al(AcAc)₃:PSCS weight ratio, the higher the thermolysis temperature and the longer the reaction time, the greater the [`(\textMn)] , \overline{\text{Mn}} , yield and softening point of Al-PCS. In addition, the oxygen and aluminum contents of Al-PCS increase at higher Al(AcAc)₃:PSCS weight ratios. As the mixing weight ratio of Al(AcAc)₃:PSCS increased, additional oxygen was introduced into Al-PCS with the increased Al content. The structure of Al-PCS was characterized by the FT-IR. These results show that Al-PCS is very similar to polycarbosilane in structure.