Effect of chemical structure on degree of conversion in light-cured dimethacrylate-based dental resins
Effect of chemical structure on degree of conversion in light-cured dimethacrylate-based dental resins
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DOI：
10.1016/s0142-9612(01)00308-8
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发表时间：
2002-04-01
期刊：
影响因子：
14
通讯作者：
Papanastasiou, G
中科院分区：
文献类型：
--
作者：
Sideridou, I;Tserki, V;Papanastasiou, G
本文以邻苯二酚/甲基丙烯酸N，N-二甲氨基乙酯为光引发体系，研究了Bis-GMA，Bis-EMA，二甲基丙烯酸氨基甲酸酯（UDMA）和二甲基丙烯酸三甘醇酯（TEGDMA）的室温光聚合反应，并用红外光谱（FT-IR）对聚合反应进行了跟踪，并用非线性最小二乘法拟合出一个合理的函数，从而可以准确地计算极限转化率。发现后者以Bis-GMA < Bis-EMA < UDMA < TEGDMA的顺序增加。这一趋势进行了讨论与二甲基丙烯酸酯的化学结构。Bis-GMA/TEGDMA、Bis-GMA/UDMA和Bis-GMA/Bis-EMA混合物的光聚合转化率与Bis-GMA的摩尔分数呈良好的线性关系，在第一对的情况下也与初始单体混合物的Tg呈良好的线性关系。(C)2002爱思唯尔科技有限公司版权所有。
In this work the room-temperature photopolymerization of Bis-GMA, Bis-EMA, urethane dimethacrylate (UDMA) and triethylene glycol dimethacrylate (TEGDMA) induced by camphoroquinone/N,N-dimethylaminoethyl methacrylate, as photo-initiator system, was followed by FT-IR. The results obtained were then fitted by a non-linear least square method to a rational function, which permitted the accurate calculation of the limiting degree of conversion. The latter was found to increase in the order Bis-GMA < Bis-EMA < UDMA < TEGDMA. This trend is discussed in connection with the chemical structure of dimethacrylates. The photopolymerization of mixtures of Bis-GMA/TEGDMA, Bis-GMA/UDMA and Bis-GMA/Bis-EMA showed a good linear relationship of degree of conversion with the mole fraction of Bis-GMA and in the case of the first pair also with the T-g of the initial monomer mixture. (C) 2002 Elsevier Science Ltd. All rights reserved.