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Facile synthesis of dual-responsive thioether-bridging graft copolymers by combination of controlled polymerization and thio-bromo click reaction
Facile synthesis of dual-responsive thioether-bridging graft copolymers by combination of controlled polymerization and thio-bromo click reaction
Synthesis of stimuli-responsive exact graft polymers with multisegmented backbone and well-controlled grafting
density can provide us with insights into structure-property correlations as well as multipurpose applications in
smart materials. Given the great potential of stimuli-labile linkages in materials science, this study describes
synthesis of thermo/oxidation-responsive poly(N-isopropylacrylamide)-graft-poly(ε-caprolactone) copolymers
via consecutive RAFT process, thio-bromo click reaction and ring-opening polymerization. The cloud point of
various graft copolymers was liable to enhance with decreasing chain length of PCL grafts and oxidation of
thioether groups. Thermo and oxidation stimuli enabled the formation of distinct morphologies involving micelles
and their clusters, necklace-like micelles, vesicles, and their mixtures. A robust method is developed to
achieve graft copolymers comprising oxidizable and hydrolyzable backbone, which allows for further researches
on special functions and applications of multicleavable smart materials.
