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Issue 32, 2006
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Ring-opening metathesis polymerizations with norbornene carboxylate-substituted metal oxo clusters

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Abstract

The clusters Ti6O4(OPr)8(endo,exo-OOC–Norb)8, Zr6O4(OH)4(endo-OOC–Norb)12 and Zr6O4(OH)4(exo-OOC–Norb)12(BuOH) were prepared by the reaction of 5-norbornene-2-carboxylic acid (HOOC–Norb) with Ti(OPr)4 or Zr(OBu)4 and were characterized by X-ray structure analyses. Ring-opening metathesis polymerization was performed with Zr6O4(OH)4(OOC–Norb)12 either in the absence or in the presence of norbornene. Highly crosslinked polynorbornene was obtained in the latter reactions. The onset of thermal decomposition of the polynorbornene crosslinked by 1–5 mol% of the cluster was about 40–45° higher than that of pristine polynorbornene. Small-angle X-ray scattering investigations showed that the clusters are randomly distributed in the polymer.

Graphical abstract: Ring-opening metathesis polymerizations with norbornene carboxylate-substituted metal oxo clusters

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Publication details

The article was received on 03 Jan 2006, accepted on 22 May 2006 and first published on 12 Jul 2006


Article type: Paper
DOI: 10.1039/B518277H
J. Mater. Chem., 2006,16, 3268-3276

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    Ring-opening metathesis polymerizations with norbornene carboxylate-substituted metal oxo clusters

    Y. Gao, F. R. Kogler, H. Peterlik and U. Schubert, J. Mater. Chem., 2006, 16, 3268
    DOI: 10.1039/B518277H

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