Aqueous Solution Properties of pH-Responsive AB Diblock Acrylamido-Styrenic Copolymers Synthesized Via Aqueous Reversible Addition-Fragmentation Chain Transfer
Polymers and High Performance Materials
Here we report the synthesis and solution characterization of a novel series of AB diblock copolymers with neutral, water-soluble A blocks consisting of N,N-dimethylacrylamide and pH-responsive B blocks of N,N-dimethylvinylbenzylamine. To our knowledge, this represents the first example of an acrylamido-styrenic block copolymer prepared directly in a homogeneous aqueous solution. The best blocking order [with poly(N,N-dimethylacrylamide) as a macro-chain-transfer agent] yielded well-defined block copolymers with minimal homopolymer impurities. The reversible aggregation of these block copolymers in aqueous media was studied with H-1 NMR spectroscopy and dynamic light scattering. Finally, an example of core-crosslinked micelles was demonstrated by the addition of a difunctional crosslinking agent to a micellar solution of the parent block copolymer. (C) 2004 Wiley Periodicals, Inc.
Journal of Polymer Science Part A-Polymer Chemistry
Sumerlin, B. S.,
Lowe, A. B.,
Thomas, D. B.,
Convertine, A. J.,
Donovan, M. S.,
McCormick, C. L.
(2004). Aqueous Solution Properties of pH-Responsive AB Diblock Acrylamido-Styrenic Copolymers Synthesized Via Aqueous Reversible Addition-Fragmentation Chain Transfer. Journal of Polymer Science Part A-Polymer Chemistry, 42(7), 1724-1734.
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