Abstract
We synthesized isosorbide glycidyl methacrylate (IsoGMA) as a bio-based analog of bisphenol A-glycidyl methacrylate (BisGMA) and investigated the mechanical and physical properties of IsoGMA-based dental composites to examine the possibility of using IsoGMA as a less-toxic substitute for BisGMA. The dental composites that were prepared with IsoGMA exhibited a low flexural strength compared to that of the BisGMA-based composites due to the high viscosity and surface energy of IsoGMA. After mixing with tri(ethylene glycol) dimethacrylate (TEGDMA), IsoGMA/TEGDMA (8:2) composites exhibited a flexural strength of 120MPa and a glass transition temperature of 96.9°C, which were higher than those of the IsoGMA composite (i.e., 79.0MPa and 65.1°C, respectively). In addition, TEGDMA improved the water sorption of the IsoGMA composite from 28.0 to 22.2μg/mm3, but slightly increased the curing shrinkage from 3.4 to 4.0%.
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