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Fluorinated Amphiphilic Block Copolymers: Combining Anionic Polymerization and Selective Polymer Modification
Author(s) -
Hillmyer Marc A.,
Schmuhl Nathan W.,
Lodge Timothy P.
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451105
Subject(s) - difluorocarbene , copolymer , amphiphile , polymer chemistry , materials science , polymerization , polymer , chemistry , organic chemistry , composite material
We report the preparation of novel fluorinated block copolymers using a two‐step modification sequence. We first prepared model polyisoprene‐poly‐ tert ‐butylmethacrylate block copolymers by anionic polymerization. Exposing these materials to difluorocarbene (generated by the thermolysis of hexafluoropropylene oxide) resulted in modification of the polyisoprene block to the corresponding difluorocyclopropane repeating unit without compromising the integrity of the poly‐ tert ‐butylmethacrylate block. Hydrolysis of the difluorocarbene‐modified materials gave the corresponding difluorocarbene‐modified polyisoprene‐polymethacrylic acid diblock copolymers. These amphiphilic materials are expected to exhibit interesting self‐assembly behavior in aqueous solution.