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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 ScienceUniversity of Minnesota, Minneapolis, MN 55455
Christopher W. Macosko
Affiliation:
Department of Chemical Engineering and Materials ScienceUniversity of Minnesota, Minneapolis, MN 55455
Alon V. McCormick
Affiliation:
Department of Chemical Engineering and Materials ScienceUniversity 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.

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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