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Amphiphilic(PEG)m(PCL)n(m ≈ n ≈ 23)miktoarm starlike copolymers with a disulfide-linked epoxy-functionalized branched core were efficiently synthesized by combination of self-condensing vinyl polymerization via reversible addition-fragmentation chain transfer(RAFT SCVP),epoxy-carboxyl coupling reaction and ring-opening polymerization.