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首页> 外文期刊>Journal of Applied Polymer Science >Method for Preparing Polyaluminocarbosilane
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Method for Preparing Polyaluminocarbosilane

机译：聚铝碳硅烷的制备方法

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摘要

Polyaluminocarbosilane (PACS) was synthesized directly by the one-pot reaction of polydimethylsilane (PDMS) with aluminum acetylacetonate [Al(acac)(3)] in an autoclave. In this closed system, all the aluminum in Al(acac)(3) was converted into PACS. Therefore, the content of aluminum could be readily controlled quantitatively. On the basis of Fourier transform infrared, H-1-NMR, C-13-NMR, Si-29-NMR, and Al-27 magic-angle spinning NMR analysis, the reaction mechanism was proposed as follows: PDMS dissociated during pyrolysis to generate silicon free radicals, and then they reacted with Al(acac)(3) to yield PACS containing (Si-O)(n)Al groups (n = 4, 5, or 6). Mean while, these reactions resulted in the cleavage of O-C and/or O=C bonds in Al(acac)(3). Some of the free-radical fragments generated by this cleavage continued to react with the silicon free radicals and were incorporated into the structural units of PACS; the rest of them may have been converted into small oxygen-containing compounds, which were removed in the subsequent processing after the reactions.
机译：聚铝碳硅烷（PACS）是通过聚二甲基硅烷（PDMS）与乙酰丙酮铝[Al（acac）（3）]的一锅法直接合成的。在此封闭系统中，Al（acac）（3）中的所有铝都转化为PACS。因此，铝的含量可以容易地定量控制。根据傅立叶变换红外光谱，H-1-NMR，C-13-NMR，Si-29-NMR和Al-27幻角旋转NMR分析，提出了以下反应机理：PDMS在热解过程中解离为生成硅自由基，然后它们与Al（acac）（3）反应生成包含（Si-O）（n）Al基（n = 4、5或6）的PACS。同时，这些反应导致Al（acac）（3）中的O-C和/或O = C键断裂。由这种裂解产生的一些自由基片段继续与硅自由基反应，并被引入到PACS的结构单元中。它们的其余部分可能已转化为小的含氧化合物，在反应后的后续处理中将其除去。

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