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lH Nmr Studies of the Sol-Gel Transition*

Published online by Cambridge University Press:  15 February 2011

Roger A. Assink  and
Bruce D. Kay
Roger A. Assink
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
Bruce D. Kay
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
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Abstract

High resolution 1H NMR spectroscopy has been employed to study the dynamics of the sol-gel transition in simple silicates. High magnetic fields (360 MHz) were used to detect and identify the various chemical species present in the Si(OCH2CH3)4:C2H5OH:H2O sol-gel system. Using these techniques, the time evolution of the reactant and product species were monitored. The results of these studies have shown that acid and base catalyzed systems react along very different chemical pathways and that the elementary hydrolysis and condensation reactions occur on widely different time scales.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 32: Symposium B – Better Ceramics Through Chemistry I , 1984 , 301
Copyright
Copyright © Materials Research Society 1984

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Footnotes

*

This work supported by the U. S. Department of Energy under Contract No. DE-AC04-76DP00789.

References

REFERENCES

[1] Brinker, C. J., Keefer, K. D., Schaefer, D. W., and Ashley, C. S., J. Non-Crystalline Solids 48 (1982) p. 47.Google Scholar
[2] Brinker, C. J., Keefer, K. D., Schaefer, D. W., Assink, R. A., Kay, B. D., and Ashley, C. S., J. Non-Crystalline Solids (in press).Google Scholar
[3] Bhacca, N. S., Johnson, L. F., and Shoolery, J. N., NMR Spectra Catalog (Varian Associates, Palo Alto, CA, 1962).Google Scholar
[4] Kay, B. D. and Assink, R. A., manuscript in preparation.Google Scholar