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摘要：本文用苯基三甲氧基硅烷、二苯基二甲氧基硅烷、含氢环体作为基础反应单体，水和甲苯为溶剂，在浓硫酸的催化作用下，进行水解缩聚反应合成了高折射率和高透明性的含氢硅油，作为LED用有机硅灌封胶的液体交联剂。实验中分别采用不同的封端剂制得了端基含氢、甲基和乙烯基的含氢硅油，傅里叶红外光谱仪的红外谱图验证了三种不同结构的存在。最后对得到的产品用阿贝折射仪和旋转粘度计分别测定折射率和动力粘度，分析含氢环体以及封端剂的质量对含氢硅油折射率和粘度的影响。结果表明，制备的含氢硅油折射率大于1.52，高于现有的含氢硅油的折射率。并且发现改变合成含氢环体和封端剂的质量可以控制含氢硅油的折射率和粘度，从而制备不同性能的含氢硅油。22932
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毕业论文关键词：LED灌封胶；含氢硅油；红外分析；折射率；动力粘度
Preparation and Properties Analysis of LED Silicone Encapsulants
Abstract：A kind of transparent and colorless hydrogen-containing silicone oil with high refractive index serving as liquid cross-linking agent for light emitting diode (LED)encapsulants was prepared by polycondensation reaction of diphenyl dimethoxy silane, phenyl trimethoxy silane and cyclic siloxane of tetramethyl tetrahydro-cyclotetrasiloxane and catalyzed by Sulfuric acid. The different blocking agents lead to different structure of hydrogen-containing silicone oil which end-of hydrogen, methyl and viny. The infrared spectrum of Fourier Transform Infrared Spectrometer proved it. Finally，analysissing the effects of the quality of methylhydro cyclo siloxane and the blocking agent on the the refractive index and the viscosity of the hydrogen-containing silicone oil, measuring by Abbe refractometer and rotation viscometer.The results show that the refractive index of hydrogen-containing silicone oil is more than 1.52, higher than the existing hydrogen-containing silicone oil. Besides，changing the quality of methylhydro cyclo siloxane and the blocking agent can control the refractive index and the viscosity of the silicone oil to prepare hydrogen silicone oil with different properties.
Key words：light emitting diode(LED) encapsulants; hydrogen-containing silicone oil; infrared analysis; refractive index; Dynamic viscosity
目录
1. 绪论 1
1.1. 研究背景 1
1.2. LED灌封胶的组成 2
1.2.1. 基础聚合物 2
1.2.2. 交联剂 3
1.2.3. 催化剂 3
1.2.4. 增粘剂 3
1.3. LED灌封胶的性能要求 4
1.4. 含氢硅油交联剂 5
1.5. 国内外的发展概况及存在的问题 5
1.5.1. LED用有机硅灌封胶的优势 5
1.5.2. LED用有机硅灌封胶的发展概况 6
1.5.3. LED用有机硅灌封胶的发展障碍 7
1.5.4. LED用有机硅灌封胶的发展趋势 7
1.6. 本课题的研究意义 7
1.7. 本文的研究目标和要解决的问题 8
1.8. 本文的主要内容 8
2. 实验部分 9
2.1. 实验原料 9
2.2. 产品合成设备及型号信息 10
2.3. 合成配方 10
2.3.1. 方案一含氢硅油的配方 10