| 초록 |
We introduce a conceptually new and versatile approach to produce highly asymmetric lamellar morphologies by the use of binary blends of block copolymers whose components are capable of the hydrogen bonding. We chose a binary blend of two block copolymers: higher molecular weight and asymmetric polystyrene-b-poly(2-vinyl pyridine) copolymer (PS-b-P2VP, denoted as S2VP) and lower molecular weight and asymmetric PS-b-poly(4-hydroxystyrene) copolymer (PS-b-PHS, denoted as SHS). Here, P2VP and PHS exhibit strong interactions arising from H-bonding between N atoms in the P2VP chains and hydroxyl group in the PHS chain. To explain the unexpected results, we investigated the exact location of short block copolymer chains in the interface. For this purpose, we synthesized deuterated polystyrene-block-polyhydroxystyrene copolymer (d-PS-b-PHS) and prepared a binary mixture with PS-b-P2VP. |
