加料方式对丙烯酸酯微乳液粒径的影响  

Influence of Feeding Mode on Particle Size of Acrylate Micro-Latex

作　　者：吴跃焕[1] 刘述梅[1] 赵建青[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2008年第3期37-40,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：山西省自然科学基金资助项目(2007011035);山西省科技攻关项目(051150);广州市科技攻关项目(2005Z3-D0331)

摘　　要：采用种子乳液聚合法,合成出乳化剂含量为1.5%、聚合物含量为50%、粒径为35.6 nm、多分散性指标为0.133的丙烯酸酯微乳液.重点考察了种子乳液制备过程中单体、乳化剂以及引发剂的加料方式对乳胶粒粒径及其分布的影响.研究表明:全滴加法制备种子乳液形成的胶束数目多,成核率高,乳液粒径小;底料中乳化剂、引发剂浓度增大,乳液粒径减小.Acrylate micro-latex containing 1.5% （mass fraction, below the same） emulsifier and 50% polymer with a particle size of 35.6nm and a polydispersity index of 0. 133 was prepared by means of seed emulsion poly- merization. The particle size and its distribution of the micro-latex affected by the feeding modes of the monomer, the emulsifier and the initiator were then investigated. The results indicate that the dropwise addition may result in a large quantity of micelles, a high nucleation rate and a small particle size, and that the particle size decreases with the content increment of the emulsifier and the initiator pre-added before the polymerization.

关 键 词：丙烯酸酯微乳液 乳胶粒径 加料方式 

分 类 号：TQ630.7[化学工程—精细化工]