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Characterization Of The Binding of Inorganic Polymers To Oxide Surfaces By NMR and NMR/MAS Spectroscopy

Published online by Cambridge University Press:  15 February 2011

Sarah D. Burton ,
William D. Samuels ,
Gregory J. Exarhos  and
John C. Linehan
Sarah D. Burton
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352.
William D. Samuels
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352.
Gregory J. Exarhos
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352.
John C. Linehan
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352.
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Abstract

Solution and solid state Magic Angle Spinning (MAS) Nuclear Magnetic Resonance (NMR) spectroscopy have been used to monitor the 31P signal of cyclic phosphazenes and associated linear polymers in solution and of these materials bound to alumina in stabilized dispersions. The differences between the simple solution experiments and the suspensions are being studied to determine the viability of NMR techniques to probe the chemical interactions between inorganic polymer dispersants and alumina particles. It has been observed in colloidal suspensions that the adsorption of phosphazenes onto an aluminum oxide surface causes a broadening of the 31P signal in solution NMR. This broadening is dependant on the amount of solid to polymer concentration, the amount of solids loading, the solvent polarity and the phosphazene substituent under investigation [1]. Conversely, the solid MAS experiments show a narrowing of the 31P signal upon adsorption of the phosphazene to alumina.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 227: Symposium J – Materials Science of High Temperature Polymers for Microelectronics , 1991 , 161
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. Exarhos, G J, Ferris, K F, Friedrich, D M, and Samuels, W D, “31P NMR Studies of the Aqueous Colloidal Suspensions Stabilized by Polyphosphazene Absorption.” Journal of the American Ceramic Society, 1988, 71(9):C406–7.Google Scholar
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