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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 209 (1993), S. 63-77 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Hochviskoses 2,2-Bis[4-(2-hydroxy-3-methacryloyloxy-propoxy)phenyl]propan (Bis-GMA) wurde als Hauptbestandteil eines Zahnfüllungsmaterials mit niedrigviskosem Verdünner (Tkriethylenglykol-dimethacrylat (TEGDMA), Trimethylolpropantrimethacrylat (TMPTMA) oder Trimethylolpropan-triacrylat (TMPTA)) und einem Füllstoff gemischt und durch Initiierung mit sichtbarem Licht polymerisiert. Der Umsatz nahm mit abnehmender Viskosität der Mischung zu. Das als Füllstoff verwendete Siliciumdioxid wurde durch strahlungsinduzierte Polymerisation von Methylmethacrylat auf der Oberfläche modifiziert. Mit höherem PMMA-Gehalt im Füllstoff nahm die Härte des damit hergestellten Zahnfüllungsmaterials ab. Die meisten Eigenschaften dieses Materials sind mit denen eines handelsüblichen Zahnfüllmaterials identisch. Die Druckhärte ist wegen der starken Füllstoff-Matrix-Grenzfläche jedoch höher.
    Notes: 2,2-Bis[4-(2-hydroxy-3-methacryloyloxy-propoxy)phenyl]propane (Bis-GMA) was used as the main ingredient for a dental composite. The dental composite was prepared by mixing high viscosity Bis-GMA with a low-viscosity diluent monomer. Three monomers were used: triethylene glycol dimethacrylate (TEGDMA), trimethylol propane trimethacrylate (TMPTMA), and trimethylol propane triacrylate (TMPTA). The mixed components were allowed to polymerize under visible light. The degree of conversion was higher for the sample with lower viscosity. The silica which was used as filler in the dental composite was modified by using the radiation-induced polymerization method in which methyl methacrylate (MMA) was grafted onto the silica gel. The higher the content of PMMA in the modified filler, the lower the hardness of the composite. Most properties of the samples are the same as those of a commercial product. The compressive strength is higher due to the strong filler-matrix interface which is provided by 60Co γ-ray radiation.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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