Terthiophene Derivative-Based Photoinitiating Systems for Free Radical and Cationic Polymerization under Blue LEDs,Industrial & Engineering Chemistry Research

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Terthiophene Derivative-Based Photoinitiating Systems for Free Radical and Cationic Polymerization under Blue LEDs
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-06-11 , DOI: 10.1021/acs.iecr.1c00743
Di Zhu ₁ , Pawel Wagner ₂ , Pu Xiao ₁

Affiliation

Terthiophene derivatives were prepared and utilized as photoinitiators of photopolymerization reactions upon exposure to LEDs (410 and 445 nm). The photochemical mechanisms of the terthiophene-based photoinitiating systems were investigated and confirmed by steady-state photolysis, fluorescence quenching, and electron paramagnetic resonance spin-trapping techniques. The photoinitiation ability of terthiophene derivatives in combination with the iodonium salt and optionally with a tertiary amine in the free radical polymerization of multifunctional acrylates and cationic polymerization of epoxides under mild light irradiation was investigated. Exceptionally, a sodium salt form of a terthiophene derivative presented exceeding water solubility and admirable efficiency in rapid hydrogel formation from the 2-hydroxy ethyl acrylate and water blend. The storage stability of the effective photoinitiating systems in the formulations was also studied under moderate conditions.

中文翻译：

用于蓝光 LED 下自由基和阳离子聚合的基于三噻吩衍生物的光引发体系

制备了三噻吩衍生物并将其用作暴露于 LED（410 和 445 nm）的光聚合反应的光引发剂。通过稳态光解、荧光猝灭和电子顺磁共振自旋捕获技术研究并证实了基于三噻吩的光引发体系的光化学机制。研究了三噻吩衍生物与碘鎓盐和任选地与叔胺组合在多官能丙烯酸酯的自由基聚合和环氧化物的阳离子聚合中在温和光照下的光引发能力。例外地，三噻吩衍生物的钠盐形式在由丙烯酸 2-羟基乙酯和水混合物快速形成水凝胶方面表现出超强的水溶性和令人钦佩的效率。

更新日期：2021-06-23

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