芘从H_2O/DMF混合溶剂向聚苯乙烯/聚丙烯酸二嵌段共聚物平头胶团增溶(Ⅱ)  

Pyrene Solubilization from H_2O/DMF Solvent Mixture into “Crew Cut” Micelles of Polystyrene Polyacrylic Acid Diblock Copolymer (Ⅱ)

作　　者：赵剑曦[1] 戴闽光[1] 

机构地区：[1]福州大学化学系,福州350002

出　　处：《功能高分子学报》1999年第4期409-413,共5页Journal of Functional Polymers

基　　金：福建省自然科学基金!(B9810005);福建省高校科技项目!(JA97012);国家教委留学回国人员启动基金

摘　　要：混合溶剂水含量强烈影响芘从Ｈ２Ｏ／ＤＭＦ混合溶剂向聚苯乙烯／ 聚丙烯酸二嵌段共聚物平头胶团的增溶，随着水含量增加而明显增大了芘和胶团内核ＰＳ间的结合力，促进了芘的增溶。实验结果表明，增加混合溶剂极性组分是实现有效增溶的一种简便方法。The effects of water content in the solvent mixture (W H 2O ) on solubilization of pyrene (Py) from H 2O/DMF solvent mixture into the "crew cut" micelles of polystyrene b polyacrylic acid (PS b PAA) diblock copolymer have been examined. The results show that W H 2O strongly affects the partitioning coefficient (K v) of Py between the micelles and the solvent mixture as well as the first stepwise association constant (K 1) between Py molecule and the vacant micelle. As increasing W H 2O , both K v and K 1 are significantly enhanced, the more molecules of Py are incorporated into the micelles. This result suggests a practical approach to obtain a large amount of hydrophobic material absorbed: a solution of micelles is prepared in suitable mixed solvent in which hydrophobic compound has a high solubility, then water is added slowly into the solution and the hydrophobic solute is thus forced to incorporate into the micellar cores.

关 键 词：两亲嵌段共聚物 平头胶团 增溶 芘 PS-B-PAA 

分 类 号：O632.51[理学—高分子化学] O632.13[理学—化学]