| 초록 |
Block copolymers can self-assemble into micelles in selective solvents.Theoretical description for the micelle structure considers the balance between core and corona block stretching and the insoluble core block-solvent interaction with the assumption that the core area is solvent-free.In this research,we investigate the micelle structure as a function of solvent size to tune the unfavorable interaction.Here,we investigate the structure of PS-PEP micelles in selective solvents such as n-alkanes to reduce the unfavorable core block-solvent interaction systematically.We observed that the critical micelle temperature, decreases as solvent size becomes small.In addition, detailed micelles structure containing core radius, solvent fraction in the core area,and aggregation number was analyzed using SAXS &SLS.It should be pointed out that when solvent size becomes smaller, the solvent can penetrate into the core, and thus the micelle structure is influenced by the solvent entropic effect |
