| 초록 |
Reversible addition fragmentation chain transfer(RAFT)polymerizations of methyl methacrylate in solution containing CO2. Product molecular weight distributions and average molecular weights indicated the successful control of MMA polymerization in CO2. The synthetic applications of the RAFT porcess are well developing, a complete mechanistic and kinetic picture is less rapidly emerging. The full understanding of the RAFT mechanism is, however, essential for developing strategies for a judicious RAFT agent design, which enables the formation of very uniform polymeric material with only negligible side products. Structure-rate correlations for the stabilizing Z-and the leaving R-group, which determine the effectivity and applicability of a specific RAFT agent, are required for this purpose. We recently demonstrated the applicability of CO2 as a solvent for RAFT polymerization and achieved excellent molecular weight control when using Cumyl dithiobenzoate(CDB). |
