| 초록 |
We studied self-organization of rod-coil diblock copolymers in thin films. The rod-coil copolymers investigated consist of poly (2-vinyl pyridine) (P2VP) and poly (n-hexyl isocyanate) (PHIC). The molecular weights of the copolymers are 120,000 g/mole with three different weight fractions of the rodlike PHIC block of 30, 50 and 70%. Mica substrates were immersed in the copolymer solutions in toluene followed by through rinsing to yield monolayers of the copolymers. Atomic force microscope (AFM) was used to investigate the morphology of the copolymer monolayers. Various nanostructures were observed, which were analyzed in terms of competing organizing forces such as the chemical affinity between two blocks, and that between each block and the surface, and the crystallization of the rodlike block. Of interest is the networked fibrous morphology found in the copolymer with the largest rod fraction, 70%. |
