| 초록 |
Living Cationic Ring-Opening polymerization has attracted much attention because of molecular weight control, monodisperse, and high and fast conversion. In previous study, poly(dithiocarbonate) was prepared from cyclic dithiocarbonate under cationic ROP condition at room temperature. we observed that the polymerization was accelerated by substituent such as sulfide and ester groups at C-5 of 1,3-oxathiolane-2-thione and provided stable polymer with rearranged structure. In this study, we attempt to synthesize multi-directional polymer such as star-shaped or dendritic structure. The polymer synthesis begins with a multi-functional core monomer of which reactive sites were activated by cationic initiator and propagated with monomer feeding of cyclic dithiocarbonate. The molecular weight of star-shaped polymers was controlled by run time and monomer concentration. |
