摘要
以醋酸乙烯酯(VAc)、丙烯酸正丁酯(BA)和甲基丙烯缩水甘油酯(GMA)为共聚单体,采用预乳化-半连续种子乳液聚合的方法,合成了一类改性醋丙乳液。用透射电子显微镜(TEM)、激光光散射(LLS)等测定了乳胶粒的粒径、粒径分布和粒子形态,发现其粒径在120 nm左右,并呈现较好的单分散特性;Zeta电位和流变测定结果显示:该乳胶粒子表面的Zeta电位为-57.2 mV,说明其带有较多的负电荷,乳液呈现出假塑性流体的特征,室温条件下该乳液储存时间可长达9个月以上,具有较好的分散稳定性。
A kind of vinyl acetate-acrylate emulsion was synthesized by pre-emulsified and semi-continuous seed emulsion polymerization using vinyl acetate（VAc）and butyl acrylate（BA）as comonomer in the presence of glycidylmethacrylate（GMA）as functional monomer.The size,size distribution and morphologies of the emulsion particles were characterized by transmission electron microscopy（TEM）and laser light scattering（LLS）.It was found that the size of emulsion particles is about 120nm and presented good mono-dispersibility.Zeta potential and rheological determination results showed that the emulsion particles have plenty negative charges,the surface Zeta potential was-57.2mV.Emulsion presented pseudoplastic fluid property which the storage time was above 9 months under room temperature.It means that the emulsion have good dispersion stability.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2011年第10期1421-1424,共4页
Chemical Research and Application
关键词
乳液聚合
粒子形态
ZETA电位
稳定性
emulsion polymerization
particle morphology
Zeta potential
stability
