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Influence of the nature of the R Group on the Hydrolysis andCondensation Process of Trifunctional Silicon Alkoxides, R-Si(OR')3

Published online by Cambridge University Press:  21 February 2011

Laurent Delattre  and
Florence Babonneau
Laurent Delattre
Affiliation:
Chimie de la Matière Condensée, Université Pierre et Marie Curie / CNRS, 4 place Jussieu, Paris, France
Florence Babonneau
Affiliation:
Chimie de la Matière Condensée, Université Pierre et Marie Curie / CNRS, 4 place Jussieu, Paris, France
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Abstract

The hydrolysis and condensation reactions of three trifunctional siliconalkoxides, R-Si(OEt)3, with various R alkyl chains (R = CH3, C2H5, C8H17),was followed by 29Si and 1H Nuclear MagneticResonance. The condensation reactions are faster for methyltriethoxysilaneand the degree of condensation of the system is higher. The other twosystems have similar behaviors during the first hours, with lowest degree ofcondensation. The condensation reactions slow down for theoctyltriethoxysilane, due to the presence of the long alkyl chains whichprevent condensation reactions between oligomeric species. The influence ofthe addition of tetraethoxysilane (TEOS) was studied: for all three systems,the degree of condensation of the network is higher, indicating the role ofcross-linking played by TEOS.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 365
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1 Schmidt, H., Mat. Res. Soc. Symp. Proc. 32, 327 (1984).Google Scholar
2 Schmidt, H., Scholze, H. and Kaiser, A., J. Non Cryst. Solids 63, 1 (1984)Google Scholar
3 Sugahara, Y., Okada, S., Sato, S., Kuroda, K., Kato, C., J. Non Cryst. Solids 167, 21 (1994)Google Scholar
4 Bommel, M.J. van, Bernards, T.N.M. and Boonstra, A.H., J. Non Cryst. Solids 128, 231 (1991)Google Scholar
5 Devreux, F., Boilot, J.P., Chaput, F., Lecomte, A., Phys. Rev. A 41, 6901 (1990)Google Scholar
6 Program from D. Massiot (CRPHT, CNRS, Orléans, France)Google Scholar
7 Sugahara, Y., Tanaka, Y., Sato, S., Kuroda, K., Kato, C., Mat. Res. Soc. Symp. Proc. 271, 2317 (1992).Google Scholar
8 Engelhardt, G., Michel, D. in High Resolution Solid State NMR of Silicates and Zeolites (Wiley and Sons, New York, 1987), p. 125 Google Scholar