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以聚甲基丙烯酸[2-(2-溴异丁酰氧)]乙酯(PBIEM)为大分子引发剂,采用接出(grafting from)原子转移自由基聚合(ATRP)技术合成了以聚丙烯酸叔丁酯-b-聚含氟丙烯酸酯为侧链的柱状分子刷PBIEM-g-(PtBA-b-PFA).通过GPC,1H-NMR和FTIR对PBIEM-g-(PtBA-b-PFA)组成和结构进行了表征,证实ATRP过程中没有发生分子间或分子内偶合反应,制备得到可控性好的含氟嵌段共聚物刷.利用大分子链中叔丁酯基团的水解反应生成两亲的含氟柱状刷PBIEM-g-(PAA-b-PFA),原子力显微镜可直接观察到PBIEM-g-(PAA-b-PFA)特征的核壳型柱状结构,得到聚合物刷的整体长度为ln=54~72 nm.
Poly (acrylic acid) (PAA) was synthesized by grafting from atom transfer radical polymerization (ATRP) using poly (2-bromoisobutyryloxy) ethyl methacrylate (PBIEM) as the macroinitiator. (PtBA-b-PFA) was obtained by GPC, 1H-NMR and FTIR on a columnar molecular brush PBIEM-g- (PtBA-b- Composition and structure were characterized to confirm that no intermolecular or intramolecular coupling reaction occurred in the ATRP process and a well-controlled fluorine-containing block copolymer brush was prepared.The hydrolysis reaction of the t-butyl ester group in the macromolecular chain generated two Pro-fluorine columnar brush PBIEM-g- (PAA-b-PFA), atomic force microscopy can be directly observed PBIEM-g- (PAA-b-PFA) characteristics of the core-shell columnar structure to get the overall length of the polymer brush For ln = 54 ~ 72 nm.