Inside Cover, Volume 49, Issue 21


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Polymer chains with well-defined functional end-groups can be coupled to form macrocyclic structures. Further chemical coupling of such cyclic structures to other polymer chains allows the formation of AB, AB2, and A2B miktoarm star copolymers, as presented by Daria E. Lonsdale and Michael J. Monteiro on page 4603. Block A consists of linear poly(tert-butyl acrylate) (PtBA) and block B consists of cyclic polystyrene (c-PSTY). Deprotection of PtBA to poly(acrylic acid) (PAA) affords amphiphilic miktoarm structures that when micellized in water give vesicle morphologies when the block length of PAA is 21 units and spherical core-shell micelles when the block length of PAA is 46 units.