一类高折射率光固化有机硅树脂的性能研究  

The Properties of Photo-curable Silicone Resin with High Refractive Index

作　　者：王茜[1] 李怡俊[1] 冯宗财[2] 王跃川[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065 [2]湛江师范学院化学科学与技术学院,广东湛江524048

出　　处：《影像科学与光化学》2013年第4期268-275,共8页Imaging Science and Photochemistry

基　　金：高分子材料工程国家重点实验室开放课题基金(KF201208)

摘　　要：光固化有机硅材料兼具光固化的高效、能耗低和环保以及有机硅树脂优异的耐温、耐候性和电绝缘性能,因此,在LED等电子器件封装方面受到广泛关注.本文研究了自制的3种含丙烯酸酯基团的光固化苯基有机硅预聚物KDS-10、KMDS-03和KMS-03的光固化特性、光学性能和热稳定性能.结果表明,这些有机硅预聚物的折光指数随苯环含量的增加而增高,苯环含量从22.3%到37.7%,折光指数相应从1.496到1.542;3种预聚物与多种丙烯酸酯相容性好,用双官能的TPGDA作稀释剂,固化反应速率最快,丙烯酸酯基团的转化率也最高;光引发剂TPO引发的光固化反应速率和转化率均最高;高折射率有机硅预聚物KDS-10光固化后的薄膜具有优异的光学性能,在550nm处的透过率为92.54%;玻璃化转变温度约为-17.41℃,起始分解温度为385℃.Photo-curable silicone materials combine the advantages of photo-curing by high efficient, energy saving and low impact on environment in application with the excellent heat and weather resistance, and electrical insulation properties of silicone materials. In this work, the photocuring behaviors, the optical properties and thermal stability of the cured materials of a series of photo-curable phenyl-silicone prepolymes （KDS-10, KMDS-03, KMS-03） are studied. It has been found that the refractive index increases with the increasing of phenyl units in the silicone prepolymer- when the phenyl content increased from 22. 3% to 37. 7%, the refractive index of the prepolyrner increased from 1. 496 of KMS-03 to 1. 542 of KDS-10. The silicone prepolymers are well compatible with acrylate diluents. The photo-curing mixture exhibits higher curing rate and vinyl conversion with difunctional TPGDT as the diluents. TPO is the most efficient photoinitator in curing rate and conversion. The photo-cured film prepared by prepolymer KDS-10 shows excellent optical properties with transmittance over 92. 54% at 550 nm and excellent thermal stability with the initial thermal degradation temperature of 385℃ with glass transition temperature about -17.4℃.

关 键 词：有机硅 预聚物 光固化 封装 器件 

分 类 号：TQ324.21[化学工程—合成树脂塑料工业]