| 초록 |
The surface composition and morphology control a number of technologically important properties of polymeric materials including the wetting, permeability, corrosion resistance, and frictional properties of the materials. In this work, the surface structures of polystyrene/poly(4-vinyl pyridine) blend films were examined. To effectively control the surface morphology, a small amount of block copolymer (polystyrene-block-poly(4-vinyl pyridine)) was added and then annealed. As expected, the polymer blend films without block copolymer exhibit the surface enrichment of the component with lower surface tension irrespective of blend composition. However, once the block copolymer was added to reduce the interfacial tension between two polymers, the size of phase-separated domains decreased and the phase-inversion was observed at a certain composition of block copolymers in polymer blend films. |
