| 초록 |
In previous study, we synthesized a stable polymer from 1,3-oxathiolane-2-thione with a alkyl sulfide substituent through ring opening polymerization(ROP). The substituent sulfide contributes to the formation of a stable intermediate cation accompanying rearrangement of the alkyl substituent. Depolymerization of the prepared ROP polymer underwent in the presence of KOtBu to yield 1,3-dithian-2-one. The presence of S-alkyl substituent at C-4 of 1,3-dithian-2-one evidently proved the rearrangement. Since the ROP showed a living polymerization property, a block copolymerization was attempted. Block copolymer was synthesized by successive addition of a second monomer after complete consumption of a starting monomer. Each chain length of the copolymer was controlled by a quantity of catalytic initiator and monomer concentration. Dye-involved copolymer was prepared to examine polymer property as a colorimetric tracer during polymerization and depolymerization. |
