核壳型丙烯酸酯类反应性微凝胶胶粒的粒径及分布  

Particle Size and Its Distribution of Acrylate Reactive Microgel Latex with Core-Shell Structure

作　　者：张静[1] 涂伟萍[1] 胡剑青[1] 

机构地区：[1]华南理工大学化工与能源学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2006年第3期72-76,共5页Journal of South China University of Technology(Natural Science Edition)

摘　　要：采用半连续种子乳液聚合法合成了核壳型丙烯酸酯类反应性微凝胶乳液，研究了反应条件对乳胶粒粒径及其分布的影响，并用FTIR，TEM和流变仪测定了乳液的结构和性能．结果表明：加大乳化剂或交联剂用量，乳胶粒粒径逐渐减小。粒径分布变宽，-％4t；剂或交联剂用量分别为3％（质量分数，下同）-4％和1％-3％时，乳液的综合性能较好；预乳化单体滴加速度增加，乳胶粒粒径减小，粒径分布变窄，适宜滴加速度为20～30mL／h；壳层加入功能性单体甲基丙烯酸（MAA），乳胶粒粒径减小，粒径分布初期变窄，但随着MAA用量的增加粒径分布变宽，MAA用量以3％-4％为佳．Acrylate reactive microgel latex with core-shell structure was synthesized by the semicontinuous and seeded emulsion polymerization technology. The effects of polymerization conditions on the particle size and its distribution were then investigated. The structure and properties of the latex were finally characterized by using FTIR, TEM and rheometer. The results show that, with the increasing of the emulsifier content or the crosslinker content, the average particle size gradually decreases and its distribution becomes wide, and that the latex is of excellent properties when the emulsifier content or the crosslinker content is 3% - 4% or 1% - 3%. Moreover, the particle size decreases and its distribution becomes narrow with the increase in the feed rate of the emulsified monomer, and 20 - 30 mL/h is the optimal value. The final results reveal that, when methacrylic acid （MMA） with optimal mass fraction of 3% -4% is added on the shell, the particle size of the latex increases and its distribution becomes narrow at first, and then becomes wide.

关 键 词：核壳结构 丙烯酸酯 反应性微凝胶 粒径 粒径分布 

分 类 号：TQ316.334[化学工程—高聚物工业]