Self-Assembly and pH-Responsiveness of ABC Miktoarm Star Terpolymers
journal contributionposted on 06.01.2009, 00:00 by K. Van Butsele, C. A. Fustin, J. F. Gohy, R. Jérôme, C. Jérôme
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This work deals with the self-assembly in water of ABC miktoarm star terpolymers consisting of hydrophobic poly(ϵ-caprolactone), hydrophilic poly(ethylene oxide) (PEO), and pH-sensitive poly(2-vinylpyridine) (P2VP). A variety of experimental techniques were used, including dynamic light scattering, transmission electron microscopy, and zeta potential. Special attention was paid to the pH dependency of the supramolecular self-assemblies. A key observation is the capability of the miktoarm terpolymers to form micelles stable over the whole range of pH, although a transition was observed from neutral to highly positively charged nanoobjects upon decreasing pH.