Synthesis, characterization, and self-assembly of amphiphilic fluorinated gradient copolymer

Authors

  • Yanjun Chen,

    1. Department of Polymer Materials and Engineering, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
    Search for more papers by this author
  • Yuying Zhang,

    1. Department of Polymer Materials and Engineering, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
    Search for more papers by this author
  • Yifeng Wang,

    Corresponding author
    1. Department of Polymer Materials and Engineering, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
    • Department of Polymer Materials and Engineering, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
    Search for more papers by this author
  • Chong Sun,

    1. Department of Polymer Materials and Engineering, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
    Search for more papers by this author
  • Chaocan Zhang

    1. Department of Polymer Materials and Engineering, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
    Search for more papers by this author

Abstract

An amphiphilic copolymer of acrylic acid (AA) and 2,2,2-trifluoroethyl methacrylate (TFEMA) was synthesized by reversible addition-fragmentation transfer (RAFT) copolymerization, using a feed method for adding TFEMA. The kinetics of the RAFT copolymerization agreed well with those characteristic of a first-order reaction and the molecular weight of copolymers increased with the conversion increasing, both demonstrating that it proceeded in a controlled polymerization manner. Optimal copolymerization was achieved when the reaction was conducted at 70°C, using a molar ratio of TFEMA : AA : RAFT agent : initiator of 400 : 400 : 4 : 1. Analysis of instantaneous 1H-NMR results proved that the obtained copolymer had a chain structure with AA segments gradually changing to TFEMA segments. The copolymer films had lower surface free energies and slightly microphase separation structures. The amphiphilic copolymer with gradient structures could self-assemble to form aggregates in selective solvents. The type and composition of solvent mixtures had great effects on the morphology and sizes of aggregates, which were investigated by transmission electron microscopy and dynamic light scattering, respectively. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci., 2013

Ancillary