Inorganic‐Organic Hybrid Polymers Based on Surface‐Modified Metal Oxide Clusters

2008 ◽  
Vol 267 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Ulrich Schubert
Keyword(s):  
Metal Oxide ◽  
Hybrid Polymers ◽  
Organic Hybrid ◽  
Metal Oxide Clusters ◽  
Surface Modified

Surface-modified Zirconium Oxide Clusters and their Use as Components for Inorganic-Organic Hybrid Materials

2004 ◽  
Vol 847 ◽  
Author(s):  
Yu Gao ◽  
Denise Silvia Dragan ◽  
Myhedin Jupa ◽  
Franz René Kogler ◽  
Michael Puchberger ◽  
...  
Keyword(s):  
Zirconium Oxide ◽  
Crosslinking Density ◽  
Polymerization Reaction ◽  
Hybrid Polymers ◽  
Organic Hybrid ◽  
Metal Oxide Clusters ◽  
Transition Metal Oxide Clusters ◽  
Surface Modified ◽  
Polymerizable Ligands ◽  
Thermal Stability Of

ABSTRACTPre-formed transition metal oxide clusters with methacrylate ligands were polymerized in the presence of organic co-monomers to form inorganic-organic hybrid polymers. The number of polymerizable ligands and thus the crosslinking density of the hybrid polymers can be varied for a given cluster type by partially exchanging the methacrylate ligands for non-reactive ones. The properties of the hybrid polymers can also be varied by adjusting the conditions of the polymerization reaction, especially by a pre-polymerization procedure. It is shown that the thermal stability of polystyrene crosslinked by Zr6O4(OH)4(OMc)12 is thus greatly improved.

Inorganic-Organic Hybrid Polymers from Surface-Modified Oxometallate Clusters

2000 ◽  
Vol 628 ◽  
Author(s):  
Ulrich Schubert ◽  
Gregor Trimmel ◽  
Bogdan Moraru ◽  
Walter Tesch ◽  
Peter Fratzl ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Cluster Size ◽  
Polymer Chains ◽  
Scattering Data ◽  
Hybrid Polymers ◽  
X Ray ◽  
Organic Hybrid ◽  
X Ray Scattering ◽  
Solvent Uptake ◽  
Surface Modified

ABSTRACTInorganic-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.

Sign in / Sign up

Export Citation Format

Share Document