Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (8): 869-874. Previous Articles     Next Articles

Original Articles

结构规整的高密度两亲性接枝聚合物刷的合成及其自组装研究

谢美然* 党靖雅 史佳鑫 韩会景
宋春梅 黄 炜 张以群

  

  1. (华东师范大学化学系 上海 200062)
  • 收稿日期:2008-07-05 修回日期:2008-11-21 出版日期:2009-04-28 发布日期:2009-04-28
  • 通讯作者: 谢美然

Synthesis and Self-assembly of Well-defined Polymer Brushes with High Grafting Density of Hydrophobic Poly(ε-caprolactone) and Hydrophilic Poly(2-(dimethylamino)ethyl methacrylate) Side Chains

Xie, Meiran* Dang, Jingya Shi, Jiaxin Han, Huijing
Song, Chunmei Huang, Wei Zhang, Yiqun
  

  1. (Department of Chemistry, East China Normal University, Shanghai 200062)
  • Received:2008-07-05 Revised:2008-11-21 Online:2009-04-28 Published:2009-04-28
  • Contact: Xie, Meiran

A novel amphiphilic polymer brush consisting of alternating poly(ε-caprolactone) (PCL) and poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) side chains was synthesized via the combination of two controlled polymerization methods, ring-opening metathesis polymerization (ROMP) and atom transfer radical polymerization (ATRP) with good control over the polymerization processes. ROMP of macromonomer norbornene-graft-poly(ε-caprolactone)/Br (PCL-NBE-Br) was first carried out to convert into a macroinitiator Poly(norbornene)-graft-poly(ε-caprolactone)/Br via “grafting through” technique, and then ATRP of DMAEMA initiated by the macroinitiator was performed to generate the densely grafted polymer brushes via “grafting from” technique. Thus, the well-defined polymer brushes with two different grafts high densely distributed on the same unit along the backbone were obtained by aforementioned strategy. The molecular weights of the polymer brushes were estimated by gel permeation chromatography and 1H NMR measurements. The self-assembly behavior and the micellar characteristics of the polymer brushes in selective solvent were investigated by DLS and TEM. The TEM image showed spherical micelles with clew or strawberry-like morphology.

Key words: amphiphilic polymer brush, macromonomer, ring-opening metathesis polymerization (ROMP), atom transfer radical polymerization (ATRP), self-assembly