Effect of photoinitiator system and water content on dynamic mechanical properties of a light-cured bisGMA/HEMA dental resin.
Effect of photoinitiator system and water content on dynamic mechanical properties of a light-cured bisGMA/HEMA dental resin.
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DOI：
10.1002/jbm.a.32617
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发表时间：
2010-06-15
影响因子：
4.9
通讯作者：
Spencer, Paulette
中科院分区：
文献类型：
--
作者：
Park, Jonggu;Ye, Qiang;Topp, Elizabeth M.;Misra, Anil;Kieweg, Sarah L.;Spencer, Paulette
选择合适的光引发剂体系对于高效聚合具有令人满意的机械和物理性能的牙科树脂至关重要。本研究的目的是评估添加碘鎓盐到双组分光引发剂体系中的影响。四个光引发剂系统包括在一个模型bisGMA/HEMA树脂，并用于制备样品在不同的水含量，然后表征的动态力学性能和最终的转化率的样品。碘鎓盐添加到双组分光引发剂体系中增加了最终转化度、玻璃化转变温度、橡胶模量和交联密度。含有4-（二甲氨基）苯甲酸乙酯作为共引发剂和碘鎓盐的光引发剂体系表现出最高的橡胶模量。在碘鎓盐存在下的增强的性能可以归因于随着原始邻苯二酚的再生而产生活性苯基自由基，这可以增加单体和引发剂之间的相容性，特别是在水存在下。结果支持了这样的假设，即含有碘鎓盐的光引发剂系统可以提高在水存在下聚合的模型树脂的机械性能和最终转化率。
The selection of an appropriate photoinitiator system is critical for efficient polymerization of dental resins with satisfactory mechanical and physical properties. The purpose of this study was to evaluate the influence of adding an iodonium salt to two-component photoinitiator systems. Four photoinitiator systems were included in a model bisGMA/HEMA resin and used to prepare samples at different water contents; the dynamic mechanical properties and the final degree of conversion of the samples were then characterized. Addition of the iodonium salt to the two-component photoinitiator systems increased the final degree of conversion, glass transition temperature, rubbery modulus, and crosslink density. The photoinitiator system containing ethyl-4-(dimethylamino) benzoate as a co-initiator and the iodonium salt exhibited the highest rubbery modulus. The enhanced properties in the presence of the iodonium salt can be attributed to the production of an active phenyl radical with regeneration of the original camphorquinone, which may increase the compatibility between monomers and initiators, especially in the presence of water. The results support the hypothesis that a photoinitiator system containing an iodonium salt can increase both mechanical properties and final conversion of model resin polymerized in the presence of water.
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影响因子：
4.9
作者：
Wang, Yong;Spencer, Paulette;Ye, Qiang
通讯作者：
Ye, Qiang
影响因子：
5
作者：
Schroeder, Walter F.;Vallo, Claudia I.
通讯作者：
Vallo, Claudia I.
影响因子：
14
作者：
Xie, D;Feng, DS;Eberhardt, AW
通讯作者：
Eberhardt, AW
DOI：
10.1002/jbm.b.31047
发表时间：
2009-02
影响因子：
3.4
作者：
Ye, Qiang;Wang, Yong;Spencer, Paulette
通讯作者：
Spencer, Paulette
影响因子：
4.4
作者：
Wang, Y;Spencer, P;Bohaty, B
通讯作者：
Bohaty, B