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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and photopolymerization of multifunctional methacrylates derived from Bis-GMA for dental applications
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Synthesis and photopolymerization of multifunctional methacrylates derived from Bis-GMA for dental applications

机译：牙科应用Bis-GMA衍生的多功能甲基丙烯酸酯的合成和光聚合

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摘要

Two multimethacrylates having three methacrylate groups (BPA-3M) and four methacrylate groups (BPA-4M) have been prepared by reacting hydroxyl groups of 2,2-bis[4-(2 prime -hydroxy-3 prime -methacryloyloxypropoxy)phenyl]propane (Bis-GMA) with methacryloyl chloride. BPA-3M and BPA-4M have much lower viscosities than the starting Bis-GMA, because they have only one or no hydroxyl group. Photopolymerizations of the multifunctional methacrylates were conducted by exposure to visible light using camphorquinone and 2-(N,N-dimethylamino)ethyl methacrylate as a photoinitiating system. High conversions >50% resulted from photopolymerization of BPA-3M, whereas Bis-GMA showed lower conversions under the same condition, implying better mechanical properties for the composite resins made from BPA-3M. BPA-4M showed much lower conversions in the photopolymerization condition. Water sorption of the photocured composite of BPA-3M containing 50 wt% of inorganic fillers was found to be 0.15%, which is only one-tenth of the commercial Bis-GMA composite.
机译：通过使2，2-双[4-（2-伯-羟基-3伯-甲基丙烯酰氧基丙氧基）苯基]丙烷的羟基反应，制备了具有三个甲基丙烯酸酯基团（BPA-3M）和四个甲基丙烯酸酯基团（BPA-4M）的两种聚甲基丙烯酸酯。 （Bis-GMA）与甲基丙烯酰氯。 BPA-3M和BPA-4M的粘度比起始Bis-GMA低得多，因为它们只有一个或没有羟基。通过使用樟脑醌和甲基丙烯酸2-（N，N-二甲基氨基）乙酯作为光引发体系，通过暴露于可见光来进行多官能甲基丙烯酸酯的光聚合。 BPA-3M的光聚合导致> 50％的高转化率，而Bis-GMA在相同条件下显示出较低的转化率，这意味着由BPA-3M制成的复合树脂具有更好的机械性能。 BPA-4M在光聚合条件下显示出低得多的转化率。发现含有50重量％的无机填料的BPA-3M的光固化复合物的吸水率为0.15％，仅是商业Bis-GMA复合物的十分之一。

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