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Sol-Gel Kinetics for the Preparation of Inorganic/Organic Siloxane Copolymers

Published online by Cambridge University Press:  10 February 2011

Stephen E. Rankin ,
Christopher W. Macosko  and
Alon V. McCormick
Stephen E. Rankin
Affiliation:
Department of Chemical Engineering and Materials Science University of Minnesota, Minneapolis, MN 55455
Christopher W. Macosko
Affiliation:
Department of Chemical Engineering and Materials Science University of Minnesota, Minneapolis, MN 55455
Alon V. McCormick
Affiliation:
Department of Chemical Engineering and Materials Science University of Minnesota, Minneapolis, MN 55455
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Abstract

A model is described which incorporates hydrolysis pseudo-equilibrium to quantify the evolution of silicon site distributions in sol-gel polymerization up to higher conversions than previously possible. 29Si nuclear magnetic resonance spectroscopy data are used 1) to provide a means of recognizing hydrolysis pseudo-equilibrium and 2) to provide examples where different substitution effects on condensation rate coefficients caused by branching are observed. Extension of the model to copolymerization is discussed.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 435: Symposium V – Better Ceramics Through Chemistry VII , 1996 , 113
Copyright
Copyright © Materials Research Society 1996

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References

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