新型改性醋酸乙烯酯共聚物乳液的研究  

Study of Novel Polyvinyl Acetate Emulsion Modified through Copolymerization

作　　者：徐叶新[1] 阚成友[1] 杜奕[1] 李玉中[2] 刘德山[1] 

机构地区：[1]清华大学化工系高分子研究所,北京100084 [2]中国农科院气象研究所,北京100081

出　　处：《化学建材》2003年第5期33-36,共4页Chemical Materials for Construction

基　　金：国家"863"项目资助课题(2001AA242041)

摘　　要：采用醋酸乙烯酯、丙烯酸丁酯(BA)及有机硅单体进行乳液共聚合,制备出了一种新型改性PVAc乳液。研究了聚合工艺、乳化剂、BA和有机硅单体等对聚合反应、乳液及乳胶膜性能的影响。研究表明:预乳化工艺明显优于半连续法工艺;当使用OP 10和十二烷基硫酸钠作为复合乳化剂时,乳液的聚合稳定性和放置稳定性均很好;随着配方中BA用量的增加,乳液稳定性逐渐提高,乳液的最低成膜温度(MFT)依次降低。Emulsions of polyvinyl acetate, butyl acrylate and organosilicon were synthesized to prepare a novel modified polymer emulsion. Influences of polymerization processes, emulsifiers, BA and organosilicons on polymerization and properties of copolymer emulsions and their films were investigated. Results showed that preemulsion process was clearly better than semicontinuous method, and polymerization stability and shelf stability of emulsion were satisfactory when OP10 and sodium dodecyl sulfate were used as composite emulsifiers. With increase of amount of BA, copolymer emulsions stability increased gradually whereas the minimum filmforming temperature in its turn decreased. 

关 键 词：醋酸乙烯酯 丙烯酸丁酯 乳液聚合 乳化剂 聚合反应 粘合剂 建筑装饰 

分 类 号：TU589[建筑科学—建筑技术科学]