| 초록 |
The phase behavior of blends of mono-end-sulfonated polystyrene (SPS) and mono-end-aminated polybutadiene (APB) capable of forming diblock-copolymer-like supramolecules was investigated by SAXS and TEM. The experimentally determined phase diagrams in the T-f space (where T is the temperature and f is the blend ratio) were then compared with theoretical prediction based on Landau-Ginzburg approach. Various interesting phase behaviors, for instance, the swelling of nanophase dimensions followed by the unbinding transition, were observed upon heating while the blend ratio was fixed, which cannot be observed in the covalently bonded block copolymer systems. These results demonstrate that the use of block-copolymer-like supramolecules can permit an efficient tuning of periodic mesophases via thermally directing formation or cleavage of block-copolymer-like supramolecules, which opens a possibility for creating nanostructured materials with several tunable morphologies in the same materials. |
