Synthesis and preliminary characterization of octakis (chloropropyldimethylsiloxy) octasilsesquioxane
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Advisor
Coadvisor
Graduate program
Undergraduate course
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Publisher
ABM, ABC, ABPol
Type
Article
Access right
Acesso aberto
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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.
Description
Keywords
Octakis (chloropropyldimethylsiloxy) octasilsesquioxane, spherosiloxane
Language
English
Citation
Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 7, n. 3, p. 499-504, 2004.
