| 초록 |
Living Cationic Ring-Opening Polymerization has attracted much attention because of controllable molecular weight, monodisperse, and high and fast conversion. We observed that the polymerization was accelerated by substituents such as sulfide and ester groups at C-5 of 1,3-oxathiolane-2-thione and provided stable polymers owing to rearranged structure. We attempted to synthesize multi-directional chain polymers such as star-shaped or dendritic structure via initiator technology. The ROP of Cyclic dithiocarbonate could be initiated by electrophilic reagents such as methyl triflate and benzyl triflates. Several alkyl triflates are very unstable and generated in-situ from reaction of AgOTf and benzyl halides. Non-linear polymer chain was achieved through multi-directional chain growth, depending on new reactive initiators from bis- and tris(bromomethyl) benzene. Emissive aromatic component was modified to a useful ROP initiator and cited at internal polymer backbone after polymerization. |
