Part 2:  Inorganic−Organic Hybrid Polymers by Polymerization of Methacrylate-Substituted Oxotitanium Clusters with Methyl Methacrylate:  Thermomechanical and Morphological Properties

2002 ◽  
Vol 14 (11) ◽  
pp. 4522-4529 ◽  
Author(s):  
Yan Gao ◽  
Namita Roy Choudhury ◽  
Janis Matisons ◽  
Ulrich Schubert ◽  
Bogdan Moraru
Keyword(s):  
Methyl Methacrylate ◽  
Morphological Properties ◽  
Hybrid Polymers ◽  
Organic Hybrid

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.

Inorganic−Organic Hybrid Polymers by Polymerization of Methacrylate- or Acrylate-Substituted Oxotitanium Clusters with Methyl Methacrylate or Methacrylic Acid

2002 ◽  
Vol 14 (6) ◽  
pp. 2732-2740 ◽  
Author(s):  
Bogdan Moraru ◽  
Nicola Hüsing ◽  
Guido Kickelbick ◽  
Ulrich Schubert ◽  
Peter Fratzl ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Methacrylic Acid ◽  
Hybrid Polymers ◽  
Organic Hybrid

Green synthesised silver nanoparticles incorporated electrospun poly(methyl methacrylate) nanofibers with different architectures for ophthalmologic alternatives

2021 ◽  
Vol 36 (2) ◽  
pp. 93-110
Author(s):  
Princy Philip ◽  
Tomlal Jose ◽  
Sarath KS ◽  
Sunny Kuriakose
Keyword(s):  
Silver Nanoparticles ◽  
Methyl Methacrylate ◽  
Antibacterial Properties ◽  
Analytical Techniques ◽  
Morphological Properties ◽  
Gram Positive ◽  
Gram Negative ◽  
Poly Methyl Methacrylate ◽  
Antimicrobial Studies ◽  
Eye Problems

Silver nanoparticles with 5–10 nm diameters are synthesised using Couroupita guianensis flower extract. The synthesised silver nanoparticles found to show good antimicrobial activity against gram negative and gram positive bacteria. Poly(methyl methacrylate) nanofibers with pristine, surface roughened and coaxial hollow forms are prepared by electrospinning. The structural and morphological properties of these pure and structurally modified poly(methyl methacrylate) nanofibers are evidenced by various analytical techniques. The antimicrobial studies of poly(methyl methacrylate) nanofibers having different architectures incorporated with silver nanoparticles are carried out. It is found that, all the three forms of poly(methyl methacrylate) nanofibers incorporated with silver nanoparticles show antibacterial properties against both gram positive and gram negative bacteria. Among these, surface roughened poly(methyl methacrylate) nanofibers incorporated with silver nanoparticles show highest antibacterial activity than the other two structural forms. The present study offers an alternative to the existing optical lenses. People especially those who suffer from eye problems can protect their eyes in a better way from infectious agents by wearing optical lens made from C. guianensis stabilised silver nanoparticles incorporated poly(methyl methacrylate) nanofibers than that made from pure poly(methyl methacrylate) nanofibers or films.

Helical, Nonracemic Inorganic−Organic Hybrid Polymers of Cadmium Halides with Pentadentate Bis(oxazoline) Ligands

2004 ◽  
Vol 126 (37) ◽  
pp. 11426-11427 ◽  
Author(s):  
Michael Seitz ◽  
Anja Kaiser ◽  
Sabine Stempfhuber ◽  
Manfred Zabel ◽  
Oliver Reiser
Keyword(s):  
Hybrid Polymers ◽  
Organic Hybrid ◽  
Oxazoline Ligands

New Inorganic-Organic Hybrid Polymers for Integrated Optics

1998 ◽  
Vol 519 ◽  
Author(s):  
Christof Roscher ◽  
Ralf Buestrich ◽  
Peter Dannberg ◽  
Oliver Rösch ◽  
Michael Popall
Keyword(s):  
Integrated Optics ◽  
Sol Gel ◽  
Optoelectronic Devices ◽  
Transmission Losses ◽  
Hybrid Polymers ◽  
Organic Hybrid ◽  
Catalyst Temperature ◽  
Tunable Refractive Index ◽  
Crosslinking Reactions ◽  
Gel Processing

AbstractNew fluorinated inorganic-organic hybrid polymers (ORMOCER*s) for integrated optics were synthesized via hydrolysis and condensation (sol-gel processing) of functionalized pentafluorophenylalkoxysi lanes followed by organic crosslinking reactions. Process parameters (catalyst, temperature and ratio of educts) were optimized to achieve low transmission losses at the most important wavelengths for telecommunication in the NIR range: 1310 nm and 1550 nm.The result is a photopatternable transparent ORMOCER (negative resist behavior) with excellent low losses: 0.20 dB/cm at 1310 nm and 0.30 dB/cm at 1550 nm.Besides their high transparency the fluorinated ORMOCERs show a variety of other properties enabling their use as waveguide materials within the production of optoelectronic devices and related thin film technology: good wetting and adhesion on various substrates (e.g. glass, silicon and several polymers), low processing temperatures (postbake below 160 °C), high thermal stability (decomposition > 250°C) and a tunable refractive index.

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