Dispersion Polymerisation In Supercritical Co_2 Using Macro-raft Agentsf

摘要

Fluorinated macro-RAFT agents can act as in situ stabilisers while exhibiting good control over block copolymers formed by dispersion polymerisation in supercritical CO_2 to yield well-defined spherical particles with a fluorinated "halo".rnRecent advances in block copolymer self-assembly have revolutionized polymer chemistry; new applications have emerged ranging from metal sequestration, to micro-electronics and biomedicine. The driving force behind this technology has been the development of various controlled polymerisation techniques. Reversible addition fragmentation chain transfer (RAFT) polymerisation has proven to be one of the most versatile of these controlled free radical methodologies. RAFT is applicable to a wide range of monomers, while exhibiting exceptional control over polymerisation kinetics. Perhaps the major reason for its popularity in biomedical applications, is that the RAFT mechanism does not require toxic metal catalysts.