疏水修饰聚丙烯酸共聚物在水溶液中的缔合作用  

Association of Copolymer Acrylic Acid/Methyl-acrylic acid/Butyl Acrylate in Aqueous Solution

作　　者：徐桂英[1] 杨延莲[1] 苑世领[1] 陈爱民[1] 郑立强[1] 

机构地区：[1]山东大学胶体与界面化学教育部重点实验室,济南250100

出　　处：《高等学校化学学报》2001年第9期1567-1569,共3页Chemical Journal of Chinese Universities

基　　金：教育部科学技术研究重点项目 (批准号 :99183);山东省科委项目 (批准号 :99112 2 80 1)资助

摘　　要：The associations of triblock copolymer made of acrylic acid, methyl acrylic acid and butyl acrylate in aqueous solution as well as in NaCl and CaCl 2 solutions were studied by using fluorescence. The micelle like clusters(MLCs) of copolymer formed is able to solubilize non polar material. A little electrolytes added in the copolymer solution can increase the value of critical aggregation concentration( ρ ac ) and micropolarity. But with the increase of the concentration of electrolytes, the value of ρ ac and micropolarity will decrease. When there is NaCl with fixed concentration in the systems, the process of the MLCs loosening is relaxed because of the charge screening. In the systems with fixed CaCl 2 concentration, Ca 2+ induced the cross link of -COO - groups, so the interface between the MLCs and the water is not obvious and the big MLCs is formed between the clusters.The associations of triblock copolymer made of acrylic acid, methyl acrylic acid and butyl acrylate in aqueous solution as well as in NaCl and CaCl 2 solutions were studied by using fluorescence. The micelle like clusters(MLCs) of copolymer formed is able to solubilize non polar material. A little electrolytes added in the copolymer solution can increase the value of critical aggregation concentration( ρ ac ) and micropolarity. But with the increase of the concentration of electrolytes, the value of ρ ac and micropolarity will decrease. When there is NaCl with fixed concentration in the systems, the process of the MLCs loosening is relaxed because of the charge screening. In the systems with fixed CaCl 2 concentration, Ca 2+ induced the cross link of -COO - groups, so the interface between the MLCs and the water is not obvious and the big MLCs is formed between the clusters.

关 键 词：疏水修饰共聚物 胶束状团簇 荧光探针 微极性 聚丙烯酸 缔合作用 

分 类 号：O631.1[理学—高分子化学] O632.51[理学—化学]