可用于LED封装的有机硅树脂的制备与表征  

Synthesis and preparation of silicone resins used for LED packaging

作　　者：南光明[1] 周丹[2] 秦元成[2] 

机构地区：[1]伊犁师范学院化学与生物科学学院,伊宁835000 [2]南昌航空大学环境与化学工程学院,南昌330063

出　　处：《化工新型材料》2014年第8期135-137,共3页New Chemical Materials

基　　金：伊犁师范学院有机化学重点学科开放课题基金资助(2013YJZD04)

摘　　要：以有机硅环四硅氧烷单体和封端剂为原料,通过开环聚合的方法合成了含乙烯基和含氢的硅油。改变原料的投料比,可得到具有不同分子结构的硅油。以正硅酸乙酯和含乙烯基封端剂为原料,改变原料的摩尔比,得到具有不同分子量的MQ硅树脂。采用红外和核磁的方法对不同硅油和硅树脂的化学结构进行表征,并用黏度计和凝胶渗透色谱对样品的黏度和分子量进行测试。将不同组分的硅油和硅树脂混合,通过硅氢加成反应而固化,得到的硅树脂在400nm以上具有较好的透光率(>90%),可用于大功率LED的封装。The silicone oil containing vinyl and hydro groups were synthesized via the ring-opening polymerization based on the octamethyl cyclotetrasiloxane, vinyl cyclotetrasiloxane and hydro cyclotetrasiloxane monomers. The silicone oils of different chenical structures were obtained by varying of the molar ratios of different monomers. The MQ silicone resins with different molecular weights were prepared. The chemical structures of the silicone oils and resins were charac- terized by the fourier transform infrared spectroscopy and nuclear magnetic resonance analysis, in addition to the viscosity and molecular weights determined by viscosimeter and gel permeation chromatography,respectively. By mixing of the silicone oils and MQ resins together,the mixture underwent the hydrosilylation addition reaction in the presence of palladium catalysts,resulting in the formation of silicone resins exhibiting good transparency （〉90 %） as the wavelength was above 400nm. The silicone resin may find application in the packaging of LED.

关 键 词：乙烯基硅油 含氢硅油 硅氢加成 MQ硅树脂 

分 类 号：TQ324.21[化学工程—合成树脂塑料工业]