IR and NMR time-resolved studies on the hydrolysis and condensation of methacryloxyalkylsilanes

The sol–gel reactions of the two methacrylate-modified silanes methacryloxymethyltriethoxysilane (MAMTES) and methacryloxypropyltrimethoxysilane (MAPTMS) were followed by using two independent time-resolved spectroscopic methods, viz., IR ATR and NMR with the aim to optimise their pre-hydrolysis tim...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2009-03, Vol.49 (3), p.329-335
Main Authors: Lavrencic Stangar, Urska, Sassi, Alessandro, Venzo, Alfonso, Zattin, Andrea, Japelj, Boštjan, Orel, Boris, Gross, Silvia
Format: Article
Language:English
Subjects:
Ceramics
Chemistry
Chemistry and Materials Science
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Composites
Condensation
Exact sciences and technology
General and physical chemistry
Glass
Hydrolysis
Inorganic Chemistry
Materials Science
Nanotechnology
Natural Materials
NMR
Nuclear magnetic resonance
Optical and Electronic Materials
Original Paper
Silanes
Siloxanes
Sol-gel processes
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Summary:The sol–gel reactions of the two methacrylate-modified silanes methacryloxymethyltriethoxysilane (MAMTES) and methacryloxypropyltrimethoxysilane (MAPTMS) were followed by using two independent time-resolved spectroscopic methods, viz., IR ATR and NMR with the aim to optimise their pre-hydrolysis times and consequently their use as precursors for hybrid materials. Time resolved measurements were carried out on the two systems under sol–gel conditions. Whereas the hydrolysis of both siloxanes is very fast, condensation proceeds gradually and is not completely finished within 5 h.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-008-1882-1