4-乙烯基吡啶对电子纸用电泳粒子形貌的影响  

Influence of 4-Vinylpyridine upon Appearance of Electrophoretic Element Applied for Image Displays

作　　者：冯宇光[1] 滕枫[1] 黄世华[1] 

机构地区：[1]北京交通大学理学院光电子所,北京100044

出　　处：《液晶与显示》2010年第5期649-655,共7页Chinese Journal of Liquid Crystals and Displays

摘　　要：基于双官能团单体4-乙烯基吡啶的特性,以甲醇为介质利用沉淀聚合法合成出二乙烯基苯-苯乙烯-4-乙烯基吡啶三元共聚圆球形产物。通过DSC检测,未发现玻璃化温度。TG的一阶微分曲线随着反应物用量的变化呈现规律性变化,并检测到吡啶基覆盖在微球表面。FT-IR测试到属于二乙烯基苯和苯乙烯的吸收峰770～875cm-1和1450～1725cm-1,属于吡啶基的吸收峰1600cm-1,进一步证实了产物的结构。利用SEM图片对微球粒径和形貌变化规律进行分析,证实了三元共聚圆形微球的存在,并初步判断了微球形貌形成的机理,进而断定影响本聚合反应产物形貌的主要原因是4-乙烯基吡啶与甲醇之间的分子间作用力。据以上研究为基础,实现了产物微球在适当介质中的电泳性能,并发现zeta电位随微球半径的变化呈现一定的规律。On the basis of property of 4-vinylpyridine,a spherical microsphere of poly（DVB-co-St-co4-VP）was prepared in methanol and by precipitation polymerization.After characterizations,no glass transition temperature was observed by DSC.Thermal stabilization of poly （DVB-co-St-co-4-VP）was changed with varying ratios of comonomers,and pyridyl on the surface of the spherical microsphere was detected by TG.The structure unit of poly（DVBco-St-co-4-VP）was confirmed by FT-IR,and two absorption bands of 770～875cm-1 and 1 450～1 725cm-1 were assigned to divinylbenzene and styrene,and absorption peak at 1 600cm-1 was belonged to pyridyl.As a result,after analyzing appearances and diameters,the synthesizing mechanism different from existing theories was obtained and it was confirmed that appearance of product was dominated by hydrogen bond between pyridyl and hydroxyl.

关 键 词：自由基沉淀聚合 氢键 4-乙烯基吡啶 电泳 

分 类 号：TN27[电子电信—物理电子学]