Institut de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15 rue Jean Starcky, 68057, Mulhouse Cedex, France.
Dentsply Sirona, De-Trey-Straβe 1, 78467, Konstanz, Germany.
Macromol Rapid Commun. 2019 Oct;40(20):e1900319. doi: 10.1002/marc.201900319. Epub 2019 Sep 4.
1-Aryl-2-(triisopropylsilyl)ethane-1,2-diones (SEDs) are proposed here as a new class of visible Type I photoinitiators (PIs) for free radical polymerization under air upon exposure to blue (@455 nm) and green (@520 nm) LEDs. Remarkably, these new systems present good polymerization performances and excellent bleaching properties compared to camphorquinone-based systems, and transparent polymers are obtained upon visible light irradiation. Real-time Fourier transform infrared spectroscopy is used to monitor the polymerization profiles. Molecular orbital calculations are also carried out for a better understanding of the structure/reactivity relationship of the photoinitiators.
1-芳基-2-(三异丙基硅基)乙烷-1,2-二酮（SEDs）被提议作为一种新型可见光 I 型光引发剂（PI），用于在空气中进行自由基聚合，在暴露于蓝色（@455nm）和绿色（@520nm）LED 下。值得注意的是，与基于樟脑醌的体系相比，这些新体系具有良好的聚合性能和优异的漂白性能，并且在可见光照射下可得到透明聚合物。实时傅里叶变换红外光谱用于监测聚合曲线。还进行了分子轨道计算，以更好地理解光引发剂的结构/反应性关系。
