高折射率聚酯树脂的合成与表征

发布时间：2018-04-01 04:27

本文选题：聚醚多元醇　切入点：聚酯树脂　出处：《河北大学》2017年硕士论文

【摘要】：近年来大众对显示器的性能要求越来越高,在显示器行业迅猛发展的前提下,为了进一步提高显示器的可观性和识别度,要对显示器的表面进行改性,涂抹高分子树脂薄层。此种高分子树脂应具备以下几种良好的性能:(1)高折射率;(2)粘结性良好;(3)涂布方法简单,无污染;(4)具备双亲性能。因此本文合成了具有以上性质的聚酯树脂,研究其结构和性能。并制备了聚酯树脂的水乳液,表征了水乳液的稳定性。首先,利用相转移催化法以双酚S和环氧丙烷为原料制备聚醚多元醇,而后通过酯交换-熔融缩聚的方法合成聚醚多元醇与2,6-萘二甲酸二甲酯比例不同的R组聚酯树脂;其次合成了聚醚多元醇与间苯二甲酸二甲酯-5-磺酸钠比例不同的P组聚酯树脂,研究同时具有苯环和磺酸基的间苯二甲酸二甲酯-5-磺酸钠对聚酯树脂折射率的影响;再次,向反应体系中加入2,2-二硫代二苯甲酸制备Q组聚酯树脂,研究2,2-二硫代二苯甲酸对聚酯树脂折射率的影响;最后,制备三组聚酯树脂的稳定水乳液。然后通过傅里叶变换红外光谱仪(FTIR)、600M核磁共振波谱仪(1H-NMR)、凝胶渗透色谱仪(GPC)、差示扫描量热仪(DSC)、热重分析仪(TGA)、纳米粒度分析仪、分光测色计、阿贝折光仪对上述三组树脂及其水乳液进行表征。结果显示,制备的R组聚酯树脂中增加2,6-萘二甲酸二甲酯的比例能够明显提高产物的折射率,但当2,6-萘二甲酸二甲酯的加入量达到一定量时,聚酯树脂折射率增加不再明显,其颜色变暗加深,对产物的光学性能不利。P组聚酯树脂中间苯二甲酸二甲酯-5-磺酸钠的加入对提高聚酯树脂的折射率是不利的,所以加入量不宜过多。Q组聚酯树脂在加入少量的2,2-二硫代二苯甲酸情况下能够很好的提高聚酯树脂的折射率,但2,2-二硫代二苯甲酸容易氧化变黑进而使产物颜色变暗加深,对产物光学性能不利。以上三组聚酯树脂的折光率均在1.6以上,属于折射率较高的物质,基本达到要求。聚酯树脂的热稳定性良好,失重5%时的温度均在350°C以上,其玻璃化转变温度均在100°C以上。以Tween-80为乳化剂制备聚酯树脂水乳液,经过长时间的静置观察,并测定其静置前后的平均粒子直径和多分散系数,表明了水乳液的分散性和稳定性良好。
[Abstract]:With the rapid development of display industry, in order to further improve the visibility and recognition of the display, the surface of the display must be modified and coated with polymer resin thin layer.This kind of polymer resin should have the following good properties: 1) high refractive index and 2) good adhesion. The coating method is simple.Therefore, polyester resin with above properties was synthesized, and its structure and properties were studied.The water emulsion of polyester resin was prepared and the stability of water emulsion was characterized.Firstly, polyether polyols were prepared from bisphenol S and propylene oxide by phase transfer catalysis, and then the R group polyester resin with different ratio of polyether polyol and dimethyl 2,6-naphthalene dicarbonate was synthesized by transesterification and melt Polycondensation.Secondly, a P-group polyester resin with different ratio of polyether polyol and dimethyl isophthalate sodium sulfonate was synthesized, and the effect of dimethyl isophthalate dimethyl phthalate sodium sulfonate with benzene ring and sulfonic group on the refractive index of polyester resin was studied.Q group polyester resin was prepared by adding 2o 2 dithiobenzoic acid to the reaction system to study the effect of 2o 2 dithiobenzoic acid on the refractive index of polyester resin. Finally, three groups of stable water emulsion of polyester resin were prepared.Then, by means of Fourier transform infrared spectrometer (FTIR) and 600M NMR spectrometer, gel permeation chromatograph (GPC), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), nanometer particle size analyzer, spectrophotometer,The three groups of resins and their aqueous emulsion were characterized by Abbe refraction instrument.The results showed that the refractive index of the prepared R group polyester resin could be increased obviously by increasing the ratio of dimethyl 2o 6-naphthalene dicarboxylate, but the refractive index of the polyester resin did not increase obviously when the addition amount of dimethyl 2o 6-naphthalene dicarboxylate reached a certain amount.The color of the resin is darkened and deepened, which is unfavorable to the optical properties of the product. The addition of dimethyl phthalate sodium sulfonate to the polyester resin of P group is unfavorable to improving the refractive index of the polyester resin.Therefore, it is not advisable to add too much. Q group polyester resin. The refractive index of polyester resin can be improved by adding a small amount of 2o 2- dithiobenzoic acid, but 2o 2-dithiobenzoic acid is easy to be oxidized and blackened and the color of the product is darkened.It is unfavorable to the optical properties of the product.The refractive index of the above three groups of polyester resins is above 1.6, which belongs to the material with high refractive index and basically meets the requirements.The thermal stability of polyester resin is good, the temperature of weight loss is above 350 掳C and the glass transition temperature is above 100 掳C.Water emulsion of polyester resin was prepared by using Tween-80 as emulsifier. After long standing observation, the average particle diameter and polydispersity coefficient before and after standing were measured, which indicated that the dispersion and stability of water emulsion were good.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN873;TQ323.4

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