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Liquid, Methoxylated Polysiloxane / Silica Hybrid Resins by a Non-Hydrolytic Route

Published online by Cambridge University Press:  10 February 2011

L. Bourget ,
P.H. Mutin  and
A. Vioux
L. Bourget
Affiliation:
UMR5637, Université de Montpellier 2, cc 007, 34095 Montpellier Cedex 5, France
P.H. Mutin
Affiliation:
UMR5637, Université de Montpellier 2, cc 007, 34095 Montpellier Cedex 5, France
A. Vioux
Affiliation:
UMR5637, Université de Montpellier 2, cc 007, 34095 Montpellier Cedex 5, France
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Abstract

The preparation of liquid, methoxylated, polysiloxane hybrid resins containing Me2Si(O-)2 (D) or MeHSi(O-)2 (DH) units cross-linked by Si(O-)4 (Q) units was attempted using the nonhydrolytic condensation reaction between Si-Cl and Si-OMe groups, catalyzed by ZrCI4. The structure of the resins was investigated by 29Si NMR, which showed that redistribution reactions played a prominent role. Thus, Si-OMe/Si-OSi redistributions lead to a highly homogeneous, random structure for the D/Q resin. On the other hand, this route does not apply to the synthesis of DH/Q resins, due to the redistribution of Si-H bonds which leads to the escape of MeSiH3 and to the formation of T and TH units.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 519: Symposium O – Organic/Inorganic Hybrid Materials , 1998 , 351
Copyright
Copyright © Materials Research Society 1998

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