基于苯氧基联烯的两亲性嵌段共聚物的合成

发布时间：2018-06-15 17:54

本文选题：聚联烯 + 嵌段共聚物　；参考：《有机化学》2017年12期

【摘要】：运用机理转换策略,结合自由基聚合和原子转移自由基聚合(ATRP),制备了含有聚联烯链段的两亲性三嵌段共聚物.设计合成了含有偶氮和ATRP引发基团的双官能团引发剂,先用该双官能团引发剂引发苯氧基联烯单体的自由基聚合,得到了含有ATRP引发基团的聚联烯大分子引发剂,然后该大分子引发剂引发亲水性单体N,N-二乙基氨乙基甲基丙烯酸酯(DEAEMA)的ATRP聚合,制得了聚N,N-二乙基氨乙基甲基丙烯酸酯-聚联烯-聚N,N-二乙基氨乙基甲基丙烯酸酯(PDEAEMA-b-PPOA-b-PDEAEMA).该三嵌段共聚物能在水溶液中形成胶束,通过荧光探针技术分别测定了它在不同离子浓度、不同p H值条件下的临界胶束浓度.实验结果表明,该聚合物胶束的cmc随着p H值增大而减小,随着离子浓度的增大而增大.
[Abstract]:The amphiphilic triblock copolymers containing polyenes were prepared by means of mechanism conversion strategy and the combination of free radical polymerization and atom transfer radical polymerization. A bifunctional initiator containing azo and ATRP initiators was designed and synthesized. The difunctional initiators were first used to initiate the free radical polymerization of phenoxy diene monomers, and the macromolecular initiators containing ATRP initiators were obtained. Then the macromolecular initiator initiated the ATRP polymerization of the hydrophilic monomer N- N- diethylaminoethylmethacrylate (DEAEMA), and the poly (N- (N-)-diethylaminoethyl methacrylate)-poly (N- (N-)-N- (-)-diethylaminoethylmethacrylate)-PDEAEMA-b-PPOA-b-PDEAEMA-PPOA-b-PDEAEMAA was prepared. The triblock copolymers can form micelles in aqueous solution. The critical micelle concentrations of the triblock copolymers at different ion concentrations and pH values have been determined by fluorescence probe technique. The experimental results show that the cmc of the polymer micelles decreases with the increase of pH value and increases with the increase of ion concentration.
【作者单位】：上海中医药大学附属普陀医院;中国科学院上海有机化学研究所;
【基金】：国家自然科学基金(No.21674124)资助项目~~
【分类号】：O631.5

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