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Hydrocarbon-Bridged Polysiloxane and Polysilsesquioxane Network Materials. §

Published online by Cambridge University Press:  21 February 2011

Gregory M. Jamison,
Douglas A. Loy,
Roger A. Assinkt and
Kenneth J. Shea
Gregory M. Jamison
Affiliation:
Properties of Organic Materials Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-0367
Douglas A. Loy
Affiliation:
Properties of Organic Materials Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-0367
Roger A. Assinkt
Affiliation:
Properties of Organic Materials Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-0367
Kenneth J. Shea
Affiliation:
Department of Chemistry, University of California Irvine, Irvine, California 92717
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Abstract

Hexylene-and phenylene-bridged polymethylsiloxane xerogels X-2 and X-4,respectively, were prepared by the sol-gel hydrolysis and condensation of 1,6-bis(diethoxymethyl-silyl)hexane 1 and 1, 4-bis(diethoxymethysilyl)benzene2 under acidic and basic conditions. These polymerizations afforded networkpolymers in the form of wet gels within several hours. The gels wereprocessed to afford xerogels whose characteristics (determined by solidstate 13C and 29Si CP MAS NMR spectroscopy andnitrogen sorption porosimetry) were compared and contrasted with those oftheir analogous polysilsesquioxanes. 29Si CP MAS NMR indicates ahigh, degree of hydrolysis and polycondensation; porosimetry measurementsreveal that the materials have significant surface areas, save for theacid-catalyzed hexylene gels X-2.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994, 487
Copyright
Copyright © Materials Research Society 1998

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Footnotes

§

This research was supported by the United States Department of Energy under contract No.DE-AC04-94AL85000.

§

This research was supported by the United States Department of Energyunder contract No. DE-AC04-94AL85000.

References

REFERENCES

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