Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 29, Issue 12-13, Pages 1161-1166Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200800176
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The self-organization of amphiphilic block copolymers in water strongly depends on their molecular structure, in particular on their hydrophilic-hydrophobic balance. Herein, a simple method for tuning the amphiphilicity of polymeric macrosurfactants in aqueous medium is proposed. This concept relies on the click ligation of an amphiphilic block copolymer (AB type) and a hydrophilic homopolymer (B type). In the present communication, the validity of this approach was examined with model polymers based on polystyrene (PS) and poly[oligo (ethylene glycol) acrylate] (POEGA) segments. A well-defined omega-azido functional diblock copolymer PS-b-POEGA and an alpha-alkyne functional homopolymer POEGA were prepared using atom transfer radical polymerization. These two polymers could be efficiently coupled to each other via copper-catalyzed azide-alkyne click chemistry in aqueous medium. Moreover, in this coupling strategy, an ester group was introduced at the junction between AB and B segments. This labile moiety may be cut by hydrolysis.
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