| 초록 |
Aggregation behaviors of amphiphilic block copolymers at the air/water interface have been widely studied in the last two decades. However, up to now, little work has been done in this subject with polymer blends because of the complicacy. In this work, Langmuir monolayers of the blends of polystyrene (PS) and polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) with different blend compositions formed at the air/water interface and the corresponding Langmuir-Blodgett films were characterized with the Langmuir film balance technique and the tapping mode atomic force microscopy (AFM), respectively. With the increase of PS content, some circular micelles' diameters tended to increase. It is because the PS homopolymer chains tend to swollen into the cores of the diblock copolymer micelles. On the other hand, the micelles exhibited different diameters because of the surface inactivity of the PS chains. With the further increase of the PS content, however, totally unexpected necklace-network structures were observed and the mechanism will be further studied in our laboratory. |
