Micellization of styrene-ethylene/butylene-styrene triblock copolymer (SEBS) in methyl isobutyl ketone studied by eluent GPC and light scattering.
Published: 2004
Language: eng
Number of pages: 97
Description: In 1995, Villacampa et al. reported the CMT transition for polystyrene-b-poly(ethylene/butylene)-b-polystyrene copolymer (SEBS) in methyl isobutyl ketone, a good solvent for the PS block. These authors have characterized the SEBS micelles at room temperature using size exclusion chromatography and light scattering methods. In my research, I have extended these studies to higher temperature using dynamic and static light scattering methods, and eluent gel permeation chromatography.Block copolymers form micelles in a solvent that is a good solvent for one of the blocks and a precipitant for the other. These micelles consist of a relatively compact core surrounded by a swollen corona formed by the soluble block. Normally copolymer micelles follow the closed association model, characterized by a well-defined association number. Micellization of block copolymers is characterized by a critical micelle temperature (CMT), defined as the temperature at which the presence of micelles is just detected at constant concentration.
Notes: Adviser:  Mitch Winnik.

Thesis (M.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 43-03, page: 0857.

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