| 초록 |
Polybenzimidazole(PBI) is well known for its thermal stability and excellent mechanical properties. Most resin monomers, which have been used in dental applications, need strong durability, small shrinkage, and easy polymerization. Therefore, based on the properties of PBI, it is expected to overcome the problems of conventional dental restorative materials. In this study, PBI was synthesized through condensation polymerization from isophthalic acid(IPA) and 3,3’-diaminobenzidine(DAB). In addition, carboxylic acid-terminated PBI oligomer was synthesized by adjusting the mol ratio between IPA and DAB. Photopolymerizable PBI was also synthesized from carboxy-PBI oligomer and 2-hydroxyethyl methacrylate(HEMA) by steglich esterification, and characterized by FT-IR, 1H-NMR, 13C-NMR, TGA and GPC. The synthesized polymer was formulated with ethoxylated bis-GMA(EBPDMA) in various ratios, and photopolymerized by DLP 3D printer, then finally used to evaluate their compressive strength by UTM |
