| 초록 |
We study the phase behavior of the blends of A-b-B and A-b-C diblock copolymers with opposite self-assembly tendencies, where the former exhibits the assembly upon heating and the latter does the assembly upon cooling. Using a compressible random-phase approximation (RPA) theory and a Ginzburg-Landau simulation based on the RPA, it is shown that a delicate balance in self and cross interactions between constituent monomers can yield various phase behaviors covering the assembly upon heating, loop-type assembly, and assembly upon cooling by varying the blend composition. In particular, the loop-forming blend reveals the tremendously enhanced pressure sensitivity of the ordering temperatures, which can prove useful in pressure-related nanofabrication. |
