synthesis and preliminary characterization of octakis (chloropropyldimethylsiloxy) octasilsesquioxane

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ID: 213356
2004
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Abstract
Octakis (hydridodimethylsiloxy) octasilsesquioxane was hydrosilated with allyl chloride using Spiers catalyst (H2PtCl6). This reaction was monitored using FT-IR spectroscopy. The synthesized product was characterized by 13C, 29Si NMR (MAS), SEM, FT-IR, Thermogravimetric techniques. The three propyl groups alpha, beta, gamma, (to the terminal silicon atom), associated of an allyl chloride, were clearly seen in the 13C NMR (alpha-CH2 at 31.8; beta-CH2 at 37.7; gamma-CH2 at 50.1 ppm). In addition, the 29Si NMR spectrum of the final product, exhibits three Q signals for Q type silicon attributed to Q² (-90.1) Q³ (-100.2) and Q4 (-111.3ppm). The presence of allyl chloride substitutes in octameric cube confers a relative porosity and thermal stability to the material.
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Authors Devaney Ribeiro do Carmo, Newton Luiz Dias Filho, Nelson Ramos Stradiotto
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Journal Majalah Ilmiah Teknologi Elektro
Year 2004
DOI
10.1590/S1516-14392004000300020
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300020
Keywords
mechanics of materials

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