A well-defined six-armed star triblock copolymer s-(PDEA62-b-PMMA195-b-PPEGMA47)6 was synthesized by the core-first ATRP method. The star triblock copolymer shows pH-tunable self-assembly behavior. Interestingly, the reversible vesicle–micelle transition could be achieved by simply adjusting the surrounding pH.

Three kinds of well-defined star triblock ABC copolymers based on a cyclodextrin core, STBP1, STBP2 and STBP3, were synthesized by the core-first ATRP method. Self-assemblies with different morphologies were obtained from the star triblock copolymers.

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