| 초록 |
Block copolymers, in which two or more chemically different polymers are covalently linked, self-assemble to form various nanometer-scale structures. Addition of a third chemically distinct C block to an AB diblock expands the phase diversity resulting in yet extensively known morphologies. A solvent annealing is a simple method to develop nanostructures in block copolymer system. However, the morphologies of block copolymer can be affected by the nature of the solvent, the relative solvent vapor pressure, the annealing time, etc. Therefore, the details of solvent annealing remain rather unclear. We have investigated the morphologies of solvent annealed PS-b-PI-b-PMMA triblock copolymers by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). Solvent annealed block copolymers show different morphologies from thermal annealed ones, which show thermodynamically favored phase. |
