【作者】 于佳； 张国伟； 孙芳；

【Author】 Jia Yu;Guowei Zhang;Fang Sun;College of Science,Beijing University of Chemical Technology;

【机构】 北京化工大学理学院；

【摘要】 设计和合成了五种不同阴离子的含硅咪唑离子液体型大分子光引发剂([Si-2959lm][X](X=Br-,Ph4B-,TsO-,N03-,CF3C00-))。考察了不同阴离子对含硅咪唑离子液体型大分子光引发剂的水溶性、紫外吸收以及辐射光降解、引发光聚合性能、热稳定性和光解碎片迁移的影响。与Irgacure 2959相比,[Si-2959lm][X]具有较高的摩尔消光系数,相似的光引发剂活性,其中[Si-2959lm][X](X=Ph4B-,CF3COO-和NO3-)在引发单体TPGDA聚合时具有相对较短的诱导期。另外,[Si-2959lm][X]不仅具有良好的水溶性,而且具有优异的热稳定性。阴离子的结构可以显著影响离子液体型光引发剂的溶解度,其水溶性大小顺序为Ph4B-<Br-<TsO-<NO3-<CF3COO-;不同阴离子对离子液体型光引发剂的热稳定性有影响,其相应热稳定性顺序为CF3COO-<NO3-<Ph4B-<Br-<TsO-。该类光引发剂均可有效地降低固化膜中光解碎片的迁移。更多还原

【Abstract】 Five macromolecular photoinitiators with ionic liquid character([Si-2959 Im][X](X = Br-,Ph4 B-,TsO-,N03-,CF3 COO-))were designed and synthesized.The influence of different anion structures on the water solubility,photoinitiating performances,and thermal property of the photoinitiators were systematically explored.[Si-2959 Im][X]have high extinction coefficient and similar photoinitiating activities and mechanism to 2-hydroxy-l-[4-(2-hydroxyethoxy) phenyl]-2-methylpropan-1-one(Irgacure 2959),while the photopolymerization induction periods of the TPGDA systems initiated by[Si-2959 Im][X](X=Ph4 B-,CF3 COO-and NO3) are slightly shorter than that by Irgacure 2959.In addition,[Si-2959 Im][X]have not only good water solubility,but also desirable thermal property.The order of water-solubility of[Si-2959 Im][X]is Ph4 B-<Br-<TsO-<N03-< CF3 COO-,the order of the thermal property is CF3 COO-< NO3-< Ph4 B-< Br-< TsO-.The migration of the photolysis fragments of[Si-2959 Im][X]from the cured material is mitigated significantly.更多还原