Micelles of Polybutadiene-b-Poly(Ethylene Oxide) in a Binary Solvent System

dc.contributor.advisorGreer, Sandra Cen_US
dc.contributor.authorPloetz, Christopher Den_US
dc.contributor.departmentChemical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2008-08-07T05:30:34Z
dc.date.available2008-08-07T05:30:34Z
dc.date.issued2008-05-01en_US
dc.description.abstractWe studied the assembly behavior of a polybutadiene-b-poly(ethylene oxide) diblock copolymer in methanol, cyclohexane, and the corresponding partially miscible binary solvent system. Dynamic light scattering indicates that the copolymer forms coexisting spherical and cylindrical micelles in both of the pure solvents. In the binary solvent system, spherical micelles form in the methanol-rich phase for a wide range of temperatures. Conversely, micelles are present in the cyclohexane-rich phase only near the critical temperature. At the critical solvent composition, micelles form in the single phase region above the critical temperature. Size exclusion chromatography results for the binary solvent system show that the copolymer generally prefers the methanol-rich phase. The preference becomes more pronounced as temperature decreases.en_US
dc.format.extent5866218 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/8310
dc.language.isoen_US
dc.subject.pqcontrolledChemistry, Polymeren_US
dc.subject.pqcontrolledChemistry, Physicalen_US
dc.subject.pqcontrolledEngineering, Chemicalen_US
dc.subject.pquncontrolledmicelleen_US
dc.subject.pquncontrolledbinary solventen_US
dc.subject.pquncontrolledcritical solution temperatureen_US
dc.subject.pquncontrolledblock copolymeren_US
dc.subject.pquncontrolledamphiphileen_US
dc.titleMicelles of Polybutadiene-b-Poly(Ethylene Oxide) in a Binary Solvent Systemen_US
dc.typeThesisen_US

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