论文部分内容阅读
The novel cyclic trithiocarbonate was synthesized by dialkylation of trithiocarbonate anion with 2,2’-bis(bromomethyl)biphenyl in a two-phase system using an onium salt as a phase-transfer agent. Styrene polymerization was carried out in the presence of cyclic trithiocarbonate (CTTC). CTTC undergoes ring opening-polymerization and the incorporated trithiocarbonate moiety derived from CTTC performs as the reversible addition-fragmentation chain transfer (RAFT) agent. Through this mechanism, multiblock polystyrenes containing various narrow polydispersity blocks can be prepared.
The novel cyclic trithiocarbonate was synthesized by dialkylation of trithiocarbonate anion with 2,2’-bis (bromomethyl) biphenyl in a two-phase system using an onium salt as a phase-transfer agent. Styrene polymerization was carried out in the presence of cyclic trithiocarbonate (CTTC). CTTC undergoes ring opening-polymerization and the incorporated trithiocarbonate moiety derived from CTTC performs as the reversible addition-fragmentation chain transfer (RAFT) agent. Through this mechanism, multiblock polystyrenes containing various narrow polydispersity blocks can be prepared.