| 초록 |
We synthesized star-shaped polystyrene-block-poly(2-vinyl pyridine) copolymer (PS-b-P2VP)by utilizing α-cyclodextrin (α-CD) as an junction point of the star shape. For this purpose, 18 hydroxyl groups on α-CD were replaced with bromine groups by the reaction with α-bromoisobutyryl bromide (BIBB). These brominated groups were used as the initiation site of atom transfer radical polymerization (ATRP) for PS and P2VP.The expected molecular structure is that 18 PS-b-P2VP chains are attached to one α-CD. We characterized that the number of block polymer-linked arms per one α-CD is higher than 16 measure by nuclear magnetic resonance(NMR) and Matrix-assisted laser desorption/ionization(MALDI). The morphologies of this block copolymer are also investigated. |
