| 초록 |
Micellar structures of amphiphilic block copolymers in the selective solvents were studied using small angle X-ray and neutron scatterings. Vesicular, cylindrical, and spherical micelles were controlled by the composition of the block copolymer and the solvent selectivity. The systematic screen of the solvent selectivity was performed by changing the mixing ratio of the two selective solvents and the solvent temperature. As the selectivity of solvent increased, the shape of the micelle was changed from sphere, to cylinder, and finally to vesicle. The mixing ratio and the temperature of solution could be parameterized into a Flory interaction parameter, χ. The discontinuous change of the solvent selectivity during heating was demonstrated at Tni with PS-b-LCP and nematic liquid crystal solvent, 5CB. |
