用超临界CO_2制备疏水改性聚丙烯酸  

Preparation of Hydrophobically Modified Poly(acrylic acid) in Supercritical Carbon Dioxide

作　　者：张斌[1] 陈鸣才[1] 刘伟区[1] 谈晶[1] 

机构地区：[1]中国科学院广州化学研究所,广州510650

出　　处：《应用化学》2004年第11期1132-1135,共4页Chinese Journal of Applied Chemistry

基　　金：广东省自然科学基金(015007)资助课题

摘　　要：以丙烯酸十八酯作为疏水单体,在65℃,15MPa压力下,用超临界CO2作为反应介质制备了疏水改性聚丙烯酸。所得共聚物为白色固体粉末,粒径分布均匀,扫描电镜显示颗粒大小约02μm。酸碱滴定法测得其组成比与投料比相近。均聚物与共聚物水溶液的粘度特性结果表明,所制备的共聚物质量分数为2%的水溶液加入NaOH溶液后,呈现出强烈的缔合作用,粘度急剧增大,且具有触变性和良好的抗盐性。Poly(acrylic acid) was hydrophobically modified with octadecyl acrylate in supercritical carbon dioxide . The copolymer obtained was white solid powder uniformly sized in about 0 2 μm as observed by SEM. The ratio of acrylic acid to octadecyl acrylate in the product by acid and base titration was found to be the same as the feed ratio. The solution viscosity of the copolymer dramatically increased with increase in pH value, and the solution of the hydrophobiclly modified poly(acrylic acid) showed good salt...

关 键 词：丙烯酸 丙烯酸十八酯 超临界二氧化碳 疏水缔合 

分 类 号：TQ317[化学工程—高聚物工业]