二茂铁四氟硼酸盐的阳离子光引发性能的研究

制备并研究了[CpFeCp]BF4作为阳离子光引发剂在高压汞灯下引发环氧类预聚物的光引发活性.发现其在紫外及可见光区均有较强吸收(λm=355nm、620nm);对环氧类预聚物,具有优良的光引发活性,感度值可达41.8mJ/cm2,优于其它的阳离子光引发剂;[CpFeCp]BF4的最佳使用浓度为3%(质量分数)左右,由于光照后仍有强后聚合活性,发现其在较低浓度(质量分数1%)引发后放置,仍可使聚合完全;同其它的阳离子光引发剂相比,[CpFeCp]BF4制备简单,非常有应用价值.

STUDY ON THE PHOTOSENSITIVITY OF CATIONIC PHOTOINITIATOR [CpFeCp]BF4

The cationic photoinitiator BF4 was synthesized and the photosensitivity in epoxide oligomer was studied. There are two main absorptions above 300 nm (λmax=355 nm and 620 nm) which extend to the visible region, So it can well match with high pressure arc. lamp. The optimized photosensitivity in epoxide is 41.8 mJ/cm2 when irradiated by 365 nm UV ray, which is better than that of other cationic photoinitiators. The best concentration of BF4 in the system of ERL 4221+EPON 812 is 3%-5%. Because of the strong post curing ability, the system of ERL 4221+EPON 812 can obtain complete curing with 1% BF4. BF4 is easier to be synthesized than other cationic photoinitiators,so it will be used widely in the future.