ABC型星型含氟聚合物制备及其自组装行为分析  

Synthesis and Self-assembly Behavior Analysis of Fluorine-Containing ABC-Type Miktoarm Star Terpolymers

作　　者：丁艳玲 刘静 刘小云[1] 谭正 庄启昕[1] DING Yanling;LIU Jing;LIU Xiaoyun;TAN Zheng;ZHUANG Qixin(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《东华大学学报（自然科学版）》2020年第4期574-583,共10页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(51573045,51773060);上海市自然科学基金资助项目(16ZR1407700)。

摘　　要：采用原子转移自由基聚合(atom transfer radical polymerization,ATRP)、单电子转移活性自由基聚合(single electron transfer living radical polymerization,SET-LRP)以及点击反应制备了一种ABC型星型含氟聚合物,即聚乙二醇-arm-聚甲基丙烯酸八氟戊酯-arm-聚丙烯酸叔丁酯(PEG-arm-POFPMA-arm-PtBA),研究了调节疏水段比例对聚合物自组装形貌的影响。结果表明:在含氟比例较低时,随着PtBA嵌段长度增大,聚合物胶束从凸点球转变为凹球,再过渡到线型胶束,最终转变为塌陷的囊泡;疏水段含氟POFPMA与PtBA的协同作用对胶束形貌的变化起主要作用。当含氟嵌段占比较高时,倾向于形成球形胶束;当PtBA占主导时,胶束形貌将发生更丰富的变化,如形成线型胶束或囊泡。This paper synthesized the fluorine-containing ABC-type miktoarm star terpolymers,namely PEG(polyethylene glycol)-arm-POFPMA(polyfluoropentyl methacrylate)-arm-P t BA(polybutyl acrylate),via atom transfer radical polymerization(ATRP),single electron transfer living radical polymerization(SET-LRP)and click reaction.The morphology evolution of PEG-arm-POFPMA-arm-P t BA terpolymers was investigated by adjusting the ratio of double hydrophobic segments.The results show that the morphology of polymeric micelles changes from sphere micelle to concave sphere,then linear micelles and collapsed vesicles at last with the increase of the length of P t BA chain at low fluorine ratio.The synergistic effect of hydrophobic segments of fluorine-containing POFPMA and P t BA plays a major role in the morphology transformation of PEG-arm-POFPMA-arm-P t BA.The terpolymer tends to form spherical micelles as the fluorine ratio at a higher value.When the P t BA segment takes dominant,there will be more complex morphologies,such as linear micelles and vesicles.

关 键 词：含氟共聚物 星型聚合物 自组装 嵌段比例 

分 类 号：O631[理学—高分子化学]