Synthesis and preliminary characterization of octakis (chloropropyldimethylsiloxy) octasilsesquioxane
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Data
2004-09
Autores
Carmo, Devaney Ribeiro Do [UNESP]
Dias Filho, Newton Luiz [UNESP]
Stradiotto, Nelson Ramos [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Resumo
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.
Descrição
Palavras-chave
Octakis (chloropropyldimethylsiloxy) octasilsesquioxane, spherosiloxane
Como citar
Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 7, n. 3, p. 499-504, 2004.