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Molecular Architecture and its role in Silica Sol-Gel Polymerization

Published online by Cambridge University Press:  28 February 2011

P. C. Cagle ,
W. G. Klemperer  and
C. A. Simmons
P. C. Cagle
Affiliation:
School of Chemical Sciences and Materials Research Laboratory, University of Illinois, Urbana, IL 61801
W. G. Klemperer
Affiliation:
School of Chemical Sciences and Materials Research Laboratory, University of Illinois, Urbana, IL 61801
C. A. Simmons
Affiliation:
School of Chemical Sciences and Materials Research Laboratory, University of Illinois, Urbana, IL 61801
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Abstract

Sol-gel polymerization of [Si8O12](OCH3)8 in CH3CN under neutral conditions yields very high surface area (SBET > 900 m2/g) xerogels. This property is seen to result from the structure of the gel on the molecular level. According to N2 adsorption studies, model studies, and TEM studies, the large size and rigidity of the cubic [Si8O12] core structure leads to polymers whose rigidity inhibits extensive crosslinking of the type observed in orthosilicate derived xerogels.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 29
Copyright
Copyright © Materials Research Society 1990

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References

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