Well-Defined Poly[(dimethylamimo)ethyl methacrylate]-b-Poly(fluoroalkyl methacrylate) Diblock Copolymers: Effects of Different Fluoroalkyl Groups on the Solution Properties

作者：Liu Cuicui; He Jinlin; Zhao Qun; Zhang Mingzu; Ni Peihong^*

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2009, 47(10): 2702-2712.

DOI：10.1002/pola.23355

• 2-(dimethylamino)ethyl methacrylate
• fluorinated copolymer
• fluoroalkyl methacrylate
• oxyanion-initiated polymerization
• stimuli-sensitive polymers

A series of well-defined, fluorinated diblock copolymers, poly[2-(dimethylamino)ethyl methacrylate]-1)-poly(2,2,2-trifluoroethyl methacrylate) (PDMA-b-PTFMA), poly[2-(dimethylamino)ethyl methacrylate]-b-poly(2,2,3,4,4,4-hexafluorobutyl methacrylate) (PDMA-b-PHFMA), and poly[2-(dimethylamino)ethyl methacrylate ]-b-poly(2,2,3,3,4,4,5,5-octafluoropentylmethacrylate) (PDMA-b-POFMA), have been synthesized successfully via oxyanion-initiated polymerization. Potassium benzyl alcoholate (BzO(-)K(+)) was used to initiate DMA monomer to yield the first block PDMA. If not quenched, the first living chain could he subsequently used to initiate a feed F-monomer (such as TFMA, HFMA, or OFMA) to produce diblock copolymers containing different poly(fluoroalkyl methacrylate) moieties. The composition and chemical structure of these fluorinated copolymers were confirmed by (1)H NMR, (19)F NMR spectroscopy, and gel permeation chromatography (GPC) techniques. The solution behaviors of these copolymers containing (tri-, hexa-, or octa-F-atom)FMA were investigated by the measurements Of Surface tension, dynamic light scattering (DLS), and UV spectrophotometer. The results indicate that these fluorinated copolymers possess relatively high Surface activity, especially at neutral media. Moreover, the DLS and LTV measurements showed that these fluorinated diblock copolymers possess distinct pH/temperature-responsive properties, depending not only on the PDMA segment but also on the fluoroalkyl structure of the FMA units.

• 出版日期2009-5-15
• 单位苏州大学