Synthesis of PAA-g-PNIPAM well-defined graft polymer by sequential RAFT and SET-LRP and its application in preparing size-controlled super-paramagnetic Fe3O4 nanoparticles as a stabilizer
作者:Xiuyu Jiang、Sujuan Zhai、Xue Jiang、Guolin Lu、Xiaoyu Huang
DOI:10.1016/j.polymer.2014.05.050
日期:2014.8
series of well-defined double hydrophilic graft copolymers, poly(acrylic acid)--poly(-isopropylacrylamide) (PAA--PNIPAM), was employed as a novel water-soluble coating for constructing superparamagnetic iron oxide nanoparticles. The copolymer was synthesized via a three-step procedure: firstly, a well-defined hydrophobic PBA-based backbone, poly(-butyl 2-((2-chloropropanoyloxy)-methyl)acrylate)--poly(-butyl
采用一系列结构明确的双亲水接枝共聚物聚丙烯酸-聚异丙基丙烯酰胺(PAA-PNIPAM)作为新型水溶性涂层来构建超顺磁性氧化铁纳米颗粒。该共聚物通过三步程序合成:首先,基于明确的疏水性 PBA 的主链,聚(2-((2-氯丙酰氧基)-甲基)丙烯酸丁酯)-聚(丙烯酸丁酯),( PBCPMA--PBA)是由新型三官能丙烯酸单体2-((2-氯丙酰氧基)甲基)丙烯酸正丁酯和丙烯酸正丁酯通过RAFT共聚制备而成;其次,以此骨架为大引发剂引发异丙基丙烯酰胺的SET-LRP,得到明确的(聚(-丁基2-((2-氯丙酰氧基)甲基)-丙烯酸酯)--聚(-丙烯酸丁酯))--聚(异丙基丙烯酰胺)((PBCPMA--PBA)--PNIPAM)两亲性接枝共聚物,具有相对较窄的多分散性(/≤1.31);第三,在酸性条件下处理(PBCPMA--PBA)--PNIPAM得到PAA--PNIPAM接枝共聚物。所得的 PAA-g-PNIPAM