Institut de Sciences des Matériaux de Mulhouse (IS2M), UMR CNRS 7361, University of Haute-Alsace, 15 rue Jean Starcky, Mulhouse Cedex, 68057, France.
Dentsply Sirona, De-Trey-Straβe 1, Konstanz, 78467, Germany.
Macromol Rapid Commun. 2020 May;41(9):e2000053. doi: 10.1002/marc.202000053. Epub 2020 Mar 20.
A new phosphine is proposed as efficient coinitiator for camphorquinone (CQ)-based photoinitiating systems for the free radical polymerization of (meth)acrylates. Remarkably, this new co-initiator can exhibit two functionalities: a phosphine moiety to overcome oxygen inhibition and an iodonium salt moiety as counter cation to initiate the polymerization process. Excellent polymerization performances in the presence of CQ for the free radical polymerization of methacrylates under blue light are observed, and amine-free systems can be easily developed from the proposed structure. The photopolymerization of composites is also investigated in the presence of the new phosphine (without iodonium counter cation) and very interesting depth of cure can be obtained from the new developed photoinitiating system after only 20 s of irradiation with a blue light-emitting diode.
提出了一种新的膦作为樟脑醌（CQ）基光引发体系的有效共引发剂，用于（甲基）丙烯酸酯的自由基聚合。值得注意的是，这种新的共引发剂可以表现出两种功能：一个膦部分以克服氧抑制，一个碘翁盐部分作为抗衡阳离子引发聚合过程。在蓝光存在下，CQ 对甲基丙烯酸酯的自由基聚合表现出优异的聚合性能，可以从所提出的结构中很容易地开发出无胺的体系。还研究了在新型膦（无碘翁抗衡阳离子）存在下的复合材料的光聚合，仅在蓝光发射二极管照射 20 秒后，就可以从新开发的光引发体系中获得非常有趣的固化深度。
