Browsing by Author "SELVY, KT"

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    STUDIES ON THE SYNTHESIS OF A METHACRYLATE-BASED DENTAL RESTORATIVE RESIN
    (JOURNAL OF APPLIED POLYMER SCIENCE, 1991) SHEELA, MS; SELVY, KT; KRISHNAN, VK; PAL, SN
    The synthesis of bisphenol A-glycidyl methacrylate (BIS-GMA), the resin component in most dental composite restorative materials, catalyzed by different tertiary amine accelerators such as N,N'-dimethyl-p-toluidine (DMPT), N,N'-dimethylamino phenethyl alcohol (DMAPEA'), and N,N'-dimethylamino ethyl methacrylate (DMAEMA) is reported in this work. The effect of varying concentrations of accelerators and the reaction conditions of the synthesis as a function of time is studied in detail. The kinetics of the reaction between epoxide and carboxyl group during the formation of BIS-GMA is monitored using infrared (IR) and chemical techniques. The reaction is found to follow first-order and zero-order kinetics with respect to epoxide and acid, respectively. The degree of epoxide and acid conversion has been calculated as a function of time. The percentages of various isomers, formed under different reaction conditions have been reported. Characterization procedures for BIS-GMA have been developed.