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首页> 外文期刊>RSC Advances >Main-chain PPEGMEMA-b-PBTFVPP-b-PPEGMEMA perfluorocyclobutyl aryl ether-based amphiphilic ABA triblock copolymer: synthesis and self-assembly
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Main-chain PPEGMEMA-b-PBTFVPP-b-PPEGMEMA perfluorocyclobutyl aryl ether-based amphiphilic ABA triblock copolymer: synthesis and self-assembly

机译：基于全氟环丁基芳基醚的两亲ABA三嵌段共聚物PPEGMEMA-b-PBTFVPP-b-PPEGMEMA主链：合成与自组装

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摘要

A series of perfluorocyclobutyl aryl ether-based amphiphilic ABA triblock copolymers consisting of hydrophilic poly[poly(ethylene glycol) methyl ether methacrylate] (PPEGMEMA) and hydrophobic poly(2,2'-bis(4-trifluorovinyl-oxyphenyl)propane) (PBTFVPP) blocks were synthesized via the site transformation strategy. A semi-fluorinated PBTFVPP segment was first prepared via thermal step-growth cycloaddition polymerization of BTFVPP trifluorovinyl aryl ether monomer followed by end functionalization to be transformed into Br-PBTFVBP-Br macroinitiator bearing one ATRP initiating group at each end. The target PPEGMEMA-b-PBTFVPP-b-PPEGMEMA triblock copolymers with relatively narrow molecular weight distributions (M-w/M-n <= 1.32) were synthesized via ATRP of PEGMEMA macromonomer initiated by Br-PBTFVBP-Br macroinitiator. A fluorescent probe technique was used to determine the critical micelle concentrations (cmc) of the obtained amphiphilic copolymers in aqueous solution. The morphologies of the micelles formed by the copolymers were investigated by transmission electron microscopy. It was shown that such triblock copolymers could self-assemble into ovals, well-defined cylinders, and spheres in aqueous solution with different initial water contents and compositions.
机译：一系列基于全氟环丁基丁基芳基醚的两亲ABA三嵌段共聚物，由亲水性聚[聚（乙二醇）甲基丙烯酸甲酯]（PPEGMEMA）和疏水性聚（2,2'-双（4-三氟乙烯基-氧苯基）丙烷）（PBTFVPP）组成）区块是通过网站转换策略合成的。首先通过BTFVPP三氟乙烯基芳基醚单体的热逐步增长环加成聚合反应制备半氟化PBTFVPP段，然后将其末端官能化，转化为在每个末端带有一个ATRP引发基团的Br-PBTFVBP-Br大分子引发剂。通过由Br-PBTFVBP-Br大分子引发剂引发的PEGMEMA大分子单体的ATRP合成具有相对窄分子量分布（M-w / M-n <= 1.32）的目标PPEGMEMA-b-PBTFVPP-b-PPEGMEMA三嵌段共聚物。使用荧光探针技术确定水溶液中获得的两亲共聚物的临界胶束浓度（cmc）。通过透射电子显微镜研究了由共聚物形成的胶束的形态。结果表明，这种三嵌段共聚物可以在不同初始水含量和组成的水溶液中自组装成椭圆形，轮廓分明的圆柱体和球形。

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