Disk micelles from nonionic coil-coil diblock copolymers

William F. Edmonds, Zhibo Li, Marc A. Hillmyer, Timothy P. Lodge

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


The micellization of an almost symmetric diblock copolymer, 1,2-polybutadiene-b-poly(hexafluoropropylene oxide), with block molecular weights of 6000 and 5700, respectively, was examined in the polybutadiene-selective solvent bis(2-ethylhexyl) phthalate. Cryogenic transmission electron microscopy indicated that the copolymer self-assembled into thin disk micelles, with radii from 20 to 150 nm. Small-angle X-ray scattering measurements were effectively modeled by the form factor for a thin disk and gave a core thickness of approximately 10 nm. Dynamic light scattering measurements gave a distribution of hydrodynamic radii that was fully consistent with the dimensions inferred from microscopy and X-ray scattering. The unprecedented adoption of the flat disk morphology by a nonionic, coil-coil diblock copolymer is attributed to the extremely strong interfacial tension between the fluoropolymer core and the solvated hydrocarbon corona, as anticipated by superstrong segregation theory.

Original languageEnglish (US)
Pages (from-to)4526-4530
Number of pages5
Issue number13
StatePublished - Jun 27 2006


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