Bis(4-methoxybenzoyl) diethylgermane: A Highly Efficient Photoinitiator for the Polymerization of Vinylcyclopropanes
Bis(4-methoxybenzoyl) diethylgermane: A Highly Efficient Photoinitiator for the Polymerization of Vinylcyclopropanes
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DOI：
10.1002/macp.201600463
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发表时间：
2016-12-01
影响因子：
2.5
通讯作者：
Moszner, Norbert
中科院分区：
文献类型：
--
作者：
Catel, Yohann;Fischer, Urs;Moszner, Norbert
用双（4-甲氧基苯甲酰基）二乙基锗烷（BMDG）催化六种1，1-二取代2-乙烯基环丙烷（VCP）的光聚合.观察到与常规蒽醌（CQ）/胺或CQ/胺/碘鎓盐光引发剂体系相比显著更高的光聚合反应性。此外，研究了吸电子取代基对单体反应活性的影响。发现1-乙氧羰基-1-乙基氨基甲酰基-2-乙烯基环丙烷5和1-乙氧羰基-2-乙烯基环丙烷羧酸2是反应性最强的单体。配制含有BMDG的1，1-二取代的VCP基牙科复合材料。这些材料表现出良好的机械性能以及低的聚合收缩率。
Bis(4-methoxybenzoyl) diethylgermane (BMDG) is used for the photopolymerization of six 1,1-disubstituted 2-vinylcyclopropanes (VCPs). A significantly higher photo-polymerization reactivity compared to the conventional camphorquinone (CQ)/amine or CQ/amine/iodonium salt photoinitiator systems is observed. Furthermore, the influence of the electron-withdrawing substituents on the monomer reactivity is investigated. 1-Ethoxycarbonyl-1-ethylcarbamoyl2-vinylcyclopropane 5 and 1-ethoxycarbonyl-2-vinylcyclopropanecarboxylic acid 2 are found to be the most reactive monomers. 1,1-Disubstituted VCP-based dental composites containing BMDG are formulated. Those materials exhibit good mechanical properties as well as a low polymerization shrinkage.