影响MMA—BA—DMAEMA三元共聚物乳胶粒径及其分布的因素  

FACTORS INFLUENCING THE EMULSION RESIN PARTICLE SIZE AND ITS DISTRIBUTION OF MMA-BA-DMAEMA COPOLYMER

作　　者：余樟清[1] 李伯耿[1] 潘祖仁[1] 

机构地区：[1]浙江大学高分子科学与工程研究所,杭州310027

出　　处：《涂料工业》1997年第5期5-6,共2页Paint & Coatings Industry

摘　　要：采用间歇及半连续乳液聚合合成了甲基丙烯酸甲酯-丙烯酸丁酯-甲基丙烯酸二氨基乙酯三元共聚物乳胶。系统研究了复合乳化剂配比及用量、聚合温度、聚合方式和官能团单体含量对共聚物乳胶粒径及其分布的影响。结果表明，随着乳化剂体系中阴离子成分的增加、乳化剂用量的增加、官能团单体含量的减少和聚合温度的降低，乳胶的粒径减小，粒径分布变宽。无种子半连续乳液聚合所得乳胶粒径比间歇聚合和相同单体滴加速率下种子半连续聚合得到的乳胶粒径更大，分布也较宽。乳化单体的滴加速率在一定范围内对乳胶粒径及其分布没有影响，只有当乳化单体滴加速率低至使体系达到“饥饿”状态时，乳胶的粒径才相应增大。A MMA -BA-DMAEMA copolymer emulsion has been prepared with batch or semi-continuous emulsion polymerization process. Influence of compound emulsifier's ratio and amount, reaction temperature, polymerization types and functional monomer amount on the emulsion resin particle size and its distribution were studied. It has been shown that increasing of the percentage of anion in emulsifier and the amount of emulsifier, and reducing of the amount of functional monomers and reaction temperature will lead to a finer resin particle size and wider distribution. Non-seeding semi-continuous emulsion polymerization will lead to a larger particle size and wider distribution than batch reaction and seeding semi -conitinuous polymerization at the same monomer droping rate. The droping rate in a proper range have no influence on the emulsion resin particle size and its distribution. Only if the droping rate is lower than that lead to a' hungry status' of the system, the particle size will become larger.

关 键 词：乳液聚合 粒径分布 乳胶粒子 三元共聚物 共聚物 

分 类 号：TQ316.334[化学工程—高聚物工业]