High-performance anthrone-based low-migration photoinitiators for low-power photopolymerization

IF 3.9 2区化学 Q2 POLYMER SCIENCE

Polymer Chemistry Pub Date : 2025-10-13 DOI:10.1039/d5py00786k

Xinquan Wang, Zecong Ye, Hui Liang, Shaomin Ji, Yanping Huo, Yingxiao Mu

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Abstract

In this work, anthrone-based donor-acceptor-donor type photoinitiators (DXD and DTD) were synthesized and introduced into a two-component system with diphenylIodonium hexafluorophosphate (Iod) for radical photopolymerization of acrylic resin monomers. At the photoinitiator concentration of 0.5 wt%, under irradiation with LED@365 nm at the power of 20 mW cm^{- 2} , the double bond conversion of monomer initiated by DXD, DTD were 63%, 64%, respectively, showing more excellent photoinitiation activities in comparison with that of the commercial photoinitiator (2-isopropylthioxine, ITX) of 52%. DTD and DXD even achieved 75% and 71% conversion rates at lower power (10mW cm ^-2 ), respectively. Moreover, DXD (7%) and DTD (8%) exhibited rather lower mobility than ITX (37%) in light-curable films. Remarkably, triplet states were revealed to have an important effect on photopolymerization. The relevant mechanisms were scientifically understood by means of steady-state photolysis, fluorescence quenching, laser flash photolysis and electron spin resonance spin trapping technologies.

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用于低功率光聚合的高性能蒽酮类低迁移光引发剂

本文合成了基于蒽酮的给体-受体-给体型光引发剂（DXD和DTD），并将其引入到六氟二苯硫鎓（Iod）的双组分体系中，用于丙烯酸树脂单体的自由基光聚合。在光引发剂浓度为0.5 wt%、功率为20 mW cm - 2的LED@365 nm照射下，DXD、DTD引发单体的双键转化率分别为63%、64%，表现出比商用光引发剂（2-异丙基硫辛，ITX） 52%的更优异的光引发活性。DTD和DXD甚至在较低功率（10mW cm -2）下分别实现了75%和71%的转换率。此外，DXD（7%）和DTD（8%）在光固化膜中的迁移率远低于ITX（37%）。值得注意的是，三重态对光聚合有重要影响。通过稳态光解、荧光猝灭、激光闪光光解和电子自旋共振自旋捕获技术，科学地了解了相关机理。

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来源期刊

Polymer Chemistry POLYMER SCIENCE-

CiteScore

8.60

自引率

8.70%

发文量

535

审稿时长

1.7 months

期刊介绍： Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.