【摘要】 研究了三芳基硫鎓六氟磷酸盐阳离子光引发剂-桐油改性酚醛环氧树脂(TMPE)和E-44环氧树脂复配体系的阳离子光固化反应。通过凝胶率的测定研究了各种条件对光固化速度的影响,并利用红外光谱分析了该反应体系光固化反应前后涂膜结构。结果表明,光引发剂的种类和浓度可以有效地改变光固化速度,Omnicat550的引发活性优于Omnicat432且与其浓度成比例;蒽、BPO等光敏化剂对体系有一定的增感作用,而吩噻嗪作用不明显;不同种类的环氧及乙烯基醚类活性稀释剂对光固化速度有较大影响;随着树脂配比中环氧基团浓度的增加光固化速度增大;该体系表现出"后固化"现象。更多还原

【Abstract】 Using triarylsulfonium hexafluorophospate salts as cationic photocuring catalysts,the photocuring reaction of Tung oil modified phenolic epoxy resin(TMPE) and bisphenol-A epoxy resin(E-44) was researched.The influence of reactive condition on photocuring rate was investigated with gel percent of the system.Coating structure before and after the photocuring reaction was charactered by FT-IR spectrum.The results show that both of structure and concentration of photo-initiator can influent the photocuring rate of the reactive system,and Omnicat 550 has higher catalytic activity than Omnicat 432 and the photocuring rate is proportional to the concentration of photo-initiator.Except of phenothiazine,the other two photo-sensitizers-anthracene and BPO can promote the initiation of Omnicat 432.Different kinds of epoxy and vinyl ether diluents can make the photocuring rate variety,and the photocuring rate is increased with the concentration of epoxy group in the system.At last,the phenomenon of post-curing of this system is appeared in this system.更多还原