Boltorn型超支化聚酯的改性及其在齿科修复中的应用

Modification of Boltorn hyperbranched polyester and its application in dental restoration

通过异氰酸酯与羟基的加成反应,实现商业化超支化Boltorn聚酯末端甲基丙烯酸酯基团的引入,将其部分取代传统的齿科单体双酚A甲基丙烯酸缩水甘油酯/二甲基丙烯酸三乙二醇酯(Bis-GMA/TEGDMA),并进一步与无机填料复配,探索其对齿科修复复合树脂性能影响规律。结果表明:超支化分子的引入能够有效降低所制备树脂的聚合收缩和溶解性,同时改性超支化分子中的氨基甲酸酯基一定程度上弥补了超支化结构本身带来的机械性能较差的弱点,所得复合树脂机械性能与Bis-GMA体系相差不大。

Methacrylate groups were introduced to the terminal of commercial hyperbranched polyester Boltorn H20 through the addition reaction of isocyanate and hydroxyl group,then partially replaced the traditional dental monomer Bis-GMA/TEGDMA,and further compounded with inorganic filler to explore its influence on the performance of dental restorative resin composite.The results showed that the introduction of hyperbranched molecules could effectively reduce the polymerization shrinkage and solubility of the prepared resin,and at the same time,the urethane group in the hyperbranched molecule compensated for the weak mechanical properties caused by the hyperbranched structure itself,and the mechanical properties of the obtained composite resin were not much different from those of the Bis-GMA system.