适用于UV-LED光源的新型光引发剂的合成及其性能研究

Preparation and Properties of New Photoinitiator for UV-LED Photo Source

本文从光活性高的3,4-乙烯二氧噻吩(EDOT)出发,在其两个活性位点上分别引入了一个乙酰基噻吩基团和一个乙酰基基团,合成了一种结构新颖的、适用于UV-LED光固化体系的光引发剂2-(2-乙酰基噻吩)-5-乙酰基-3,4-乙烯二氧噻吩(S-2)。利用核磁共振氢谱对其结构进行了表征,并测试了其紫外吸收特性和热稳定性,还利用实时红外技术对其光引发活性进行了测试。结果表明,此光引发剂在365~405 nm范围内有较好的吸收,其紫外吸收性能和热稳定性优于异丙基硫杂蒽酮(ITX),光引发活性与ITX相当。

One photoinitiator based on the 3,4-ethylenedioxythiophene(EDOT)was synthesized through introducing an acetylehienyl and an acetyl group respectively into two active sites of the EDOT.The structure was characterized by 1HNMR spectroscopy.UV-Vis absorption spectroscopy,thermal stability were also tested.We also measured its photoinitiating activity with real-time FTIR technology.The results show that the photoinitiator has good absorption in the range of 365-405 nm,which is better than 2-isopropylthioxanthone(ITX)and suitable for UV-LED photocuring systems.Meanwhile,its thermal stability is better than ITX and the photoinitiating activity is comparable to ITX.