高固含量丙烯酸酯共聚物乳液的单体组成与流变行为  

Monomer Ratio and Rheological Behavior of High Solid Content Acrylate Copolymer Emulsions

作　　者：刘建平[1] 孙彦琳[2] 王红[2] 刘浪[3] 赵星[2] 

机构地区：[1]昆明理工大学材料与冶金工程学院 [2]昆明理工大学理学院 [3]云南省新材料制备与加工重点实验室,云南昆明650093

出　　处：《高分子材料科学与工程》2008年第7期48-51,共4页Polymer Materials Science & Engineering

基　　金：教育部科学技术研究重点项目(206137);云南省自然科学基金项目(2004E0129M);云南省教育厅科学基金项目(06Z058A,5J0111A)

摘　　要：合成了一系列固体含量为70%的丙烯酸丁酯/甲基丙烯酸甲酯/α-甲基丙烯酸(BA/MMA/MAA)共聚物乳液,研究了软(BA)、硬(MMA)段单体用量比对乳液体系流变行为的影响,并对其乳胶粒的粒径分布和微观形态进行了表征。结果表明,所合成乳液乳胶粒的粒径在50nm^650nm范围内,呈宽分散分布状态。当BA/MMA<60/40时,乳液可保持低黏度;而当BA/MMA>60/40时,乳液的黏度急剧增加。随着乳液中软、硬段单体比的不同,乳液的乳胶粒分布状态和凝聚形态均有显著变化。High solid content butyl acrylate/methyl methacrylate/methacrylic acid （BA/MMA/ MAA） copolymer emulsions were synthesized using semi-continuous emulsion polymerization. The effects of the monomer ratio （BA/MMA） on the rheological behavior of emulsion were studied. The particle size distribution （PSD） and the micro-morphology of the latex particles were also investigated. The results show that the particle size of latex particles is within 50nm 650nm and PSD is multimodal. When BA/MMA is less than 60/40, the emulsions can be maintained at low viscosity. But when it is more than 60/40, the viscosity increases sharply. Under unchanged conditions in the synthesis, notable differences in PSD shapes and aggregation patterns of emulsions can be observed when using different monomer ratio.

关 键 词：高固含量 单体组成 丙烯酸酯乳液 流变性质 

分 类 号：TQ316.33[化学工程—高聚物工业]