三芳基硫六氟锑酸盐引发环氧树脂阳离子光固化的研究

Study on the Cationic Photocuring of Epoxy Resin with Triarylsulfonium Hexafluoroantimonates

对合成的三种三芳基硫六氟锑酸盐（Ｐｈ３Ｓ＋ＳｂＦ－６，，ＭｅＰｈＰｈ２Ｓ＋ＳｂＦ－６，ｔ－ＢｕＰｈＰｈ２Ｓ＋ＳｂＦ－６）用红外光谱、核磁共振谱和元素分析进行了表征，并研究了以此作光引发剂的环氧聚甲基硅氧烷ＥＰＳ和双酚Ａ环氧Ｅ４４的阳离子光固化。结果表明光引发剂结构、浓度及蒽、酚噻嗪等光敏剂对光固化速度有不同程度的影响，并得到固化速度快、机械性能较好、具有明显“后固化”特征的光固化组成物。

Three triarylsulfonium hexafluoroantimonates microstructures were characterized by IR、H-NMR and elemental analysis. Study of the mechanism of cationic photocuring of epoxy resin-epoxypolysiloxane (EPS) and biphenol A epoxide (E-44) with these sulfonium salts was conducted, the influence of concentration and structure of photoinitiator and added photosensitizers on photocuring rate were also studied. The results show that these sulfonium salts have high photoreactivity and excellent storage stability, and the films of EPS/E-44 using those sulfonium salts as photoinitiator have good techenical properties. The photocurable compositions of EPS/E-44 can be desired to utilize extensively in manufacturing new type of UV- cured coating, adhesives and sealing materials.