有机硅改性丙烯酸酯乳液的合成和形态分析  

Preparation and Morphological Analysis of Organic Silicone Modified Acrylate Emulsion

作　　者：严微[1] 鲁琴 胡荣涛 杨婷婷[1] 高庆[1] 彭慧[1] 程时远[1] 

机构地区：[1]湖北大学材料科学与工程学院功能材料绿色制备与应用省部共建教育部重点实验室,湖北武汉430062 [2]武汉华工图像技术开发有限公司,湖北武汉430223 [3]武汉荟普化学新材料有限公司,湖北武汉430030

出　　处：《化学与生物工程》2011年第8期24-28,共5页Chemistry & Bioengineering

基　　金：湖北省自然科学基金资助项目(2006ABA022);湖北省教育厅科研项目(Q200610004)

摘　　要：以过硫酸铵(APS)为引发剂、十二烷基苯磺酸钠(SDBS)/辛基酚聚氧乙烯醚马来酸酯钠(OP-10)为复合乳化剂,利用含乙烯基的有机硅单体与丙烯酸酯类单体进行乳液聚合制备了甲基丙烯酸甲酯(MMA)/丙烯酸丁酯(BA)/有机硅(Si-1800)交联聚合物乳液。通过透射电子显微镜(TEM)观察乳胶粒形态的最佳染色方法为pH=2.0的PTA染色。在此条件下采用光子相关光谱(PCS)法通过激光光散射粒度仪测试发现乳胶粒的粒径随着引发剂用量的增加而增大;在SDBS和OP-10配比为1∶2、Si-1800含量为9%的最佳条件下,乳胶粒粒径分布均匀;通过跟踪不同Si-1800含量下乳胶粒粒径随反应时间的变化确定MMA/BA/Si-1800复合乳液的成核机理以胶束成核为主。Methyl methactylate(MMA)/butyl acrylate(BA)/vinyl terminal polysiloxane(Si-1800) emulsion was prepared using ammonium persulfate(APS) as initiator,sodium dodylcyl benzene sulfonate(SDBS)/sodium(polyoxyethylated octyl phenol) maleate(OP-10) as compound emulsifier.The morphology of emulsion was observed by transmission electron microscropy(TEM).It had been found that the best staining method was by phosphotungstic acid(PTA) at pH value 2.0.Under above condition,the particle size was verified increasing with the initiator amount assisted by photon correlation spectroscopy(PCS).The size distribution of the latex particles was even at the best SDBS and OP-10 ratio of 1∶2 and the best Si-1800 content of 9%.It also proved that the 'micellar nucleation' mechanism took effect during the polymerization course of MMA/BA/Si-1800 by tracking the change of particle size with reaction time at different Si-1800 contents.

关 键 词：丙烯酸酯 有机硅 乳胶粒 形态 

分 类 号：O627.4[理学—有机化学] O631.5[理学—化学]