文献类型：期刊文献

中文题名：苯丙乳液的粒径与形貌控制研究

英文题名：Study on the Control of Particle Size and Morphology of Styrene-Acrylic Emulsion

作者：王鸿[1,2];徐健[2];郑柏存[1];郭卫红[3]

机构：[1]华东理工大学体育新材料研发中心,上海200237;[2]上海三瑞高分子材料有限公司,上海200237;[3]华东理工大学材料科学与工程学院高分子合金研究室,上海200237

年份：2014

卷号：44

期号：1

起止页码：34

中文期刊名：涂料工业

外文期刊名：Paint & Coatings Industry

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：苯丙乳液;粒径及其分布;乳化剂

外文关键词：styrene-acrylic emulsion; particle size and its distribution; emulsifier

摘要：以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)和苯乙烯(St)为单体,采用半连续种子乳液聚合工艺,制备了苯丙聚合物乳液,研究了乳液聚合过程中的制备工艺、引发剂类型、乳化剂用量、种子乳液的乳化剂用量、预乳液和引发剂的滴加速率对不同阶段的乳胶粒粒径及其分布的影响。结果表明:半连续种子乳液聚合,单体滴加工艺制备的乳液粒径最小;引发剂种类对粒径无影响;乳化剂用量为10%时,乳液的粒径为96 nm,且分布宽度最窄,在种子乳液中乳化剂用量为40%时,乳液粒径最小,为104 nm;当预乳液滴加速度小于163 mg/s,引发剂滴加速率小于11.5 mg/s时,粒径未有变化。TEM测试表明了乳胶粒在整个乳液聚合过程中的成核长大的机理,并得到乳胶粒形貌可控的最佳方案。
The styrene-acrylic emulsion was prepared by semi-continuous seed-emulsion polymerization with monomers of methyl methacrylate （ MMA）, butyl acrylate （BA） and sty- rene（St） as co-monomers. The influence of the preparation process, the initiator type, the concentration of emulsifier, the concentration of emulsifier of seed emulsion, the dropping rate of pre-emulsion and initiator on the latex particle size and its distribution（PSD） were investi- gated. The experimental results showed that dropwise addition of pre-emulsion couht get the smallest particle size ; the initiator type had no effect on the particle size ; the particle size of e- mulsion reached 96 nm with the narrowest size distribution when the concentrate of emulsifier was 10%; at the same concentration of the emulsifier in pre-emulsification process, the parti- cle size of emulsion was 104 nm when the concentrate of the seed emulsion was 40% ; the par- title size did not change when the dropping rate of pre-emulsion was lower than 163 mg/s andtile dropping rale of initiator was lower than 11.5 mg/s. TEM analysis revealed the nucleation growlh mechanism of the latex particles during the emulsion polymerization process, resulting in all optimum resolution for particle morphology control.