Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 209, Issue 21, Pages 2248-2258Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.200800232
Keywords
aggregation; diblock copolymers; fluorophilic block copolymers; micelles; poly(2-oxazoline); small-angle neutron scattering
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Funding
- Deutsche Forschungsgemeinschaft [PA 771/2, JO 287/4]
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Amphiphilic poly(2-alkyl-2-oxazoline) diblock copolymers of 2-methyl-2-oxazoline (MOx) building the hydrophilic block and either 2-nonyl-2-oxazoline (NOx) for the hydrophobic or 2-(1H,1H',2H,2H'-perfluorohexyl)-2-oxazoline (FOx) for the fluorophilic block were synthesized by sequential living cationic polymerization. The polymer amphiphiles form core/shell micelles in aqueous solution as evidenced using small-angle neutron scattering (SANS). Whereas the diblock copolymer micelles with a hydrophobic NOx(n) block are spherical, the micelles with the fluorophilic FOx(n) are slightly elongated, as observed by SANS and TEM. In water, the micelles with fluorophilic and lipophilic cores do not mix, but coexist.
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