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Inorganic-Organic Hybrid Polymers from Surface-Modified Oxometallate Clusters

Published online by Cambridge University Press:  01 February 2011

Ulrich Schubert
Affiliation:
Institut für Anorganische Chemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Austria
Gregor Trimmel
Affiliation:
Institut für Anorganische Chemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Austria
Bogdan Moraru
Affiliation:
Institut für Anorganische Chemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Austria
Walter Tesch
Affiliation:
Ludwig Boltzmann Institut für Osteologie, Hanusch Krankenhaus, Heinrich Collin Str. 30, 1140 Wien, Austria Erich Schmid Institut für Materialwissenschaft der ÖAW & Universität Leoben, Jahnstr. 12, A-8700 Leoben, Austria
Peter Fratzl
Affiliation:
Erich Schmid Institut für Materialwissenschaft der ÖAW & Universität Leoben, Jahnstr. 12, A-8700 Leoben, Austria
Silvia Gross
Affiliation:
Institut für Anorganische Chemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Austria
Guido Kickelbick
Affiliation:
Institut für Anorganische Chemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Austria
Nicola Hüsing
Affiliation:
Institut für Anorganische Chemie, Technische Universität Wien, Getreidemarkt 9, A-1060 Wien, Austria
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Abstract

Inorganic-organic hybrid polymers were prepared by radical polymerization of methacrylic acid or methyl methacrylate with the (meth) acrylate-substituted oxozirconium and oxotitanium clusters Zr6(OH)4O4(OMc)12(OMc = methacrylate), Zr4O2(OMc)12, Ti6O4(OEt)8(OMc)8 and Ti4O2(OPri)6(OAcr)6(OAcr = acrylate). A few mol% of cluster is sufficient for an efficient cross-linking of the polymer chains. Small-angle X-ray scattering data indicate that the cluster size is retained in the polymers and that the microstructure of the cluster cross-linked samples can be described by a dispersion of identical spherical or disk-shaped clusters in the polymer. The obtained hybrid polymers exhibit a higher thermal stability because depolymerization reactions are inhibited. Contrary to undoped poly (methyl methacrylate), the cluster cross-linked polymers are insoluble but swell in organic solvents. The solvent uptake upon swelling decreases with an increasing amount of polymerized cluster.

Type
Research Article
Copyright
Copyright © Materials Research Society 2000

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