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Jin-Xia Liu, Cong Yuan, Ze Su, Ting-Ting Xu, Liu-He Wei and Zhi Ma Three-arm star block copolymers of ε-caprolactone and acrylic acid: Synthesis and micellization behavior Journal of Polymer Science Part A: Polymer Chemistry 51

Version of Record online: 19 FEB 2013 | DOI: 10.1002/pola.26577

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Three-arm star poly(ε-caprolactone)-b-poly(acrylic acid) (T-A star PCL-b-PAA) copolymers were synthesized via a “core-first” approach combining ring-opening polymerization and atom transfer radical polymerization. GPC traces of copolymers produced showed that ROP of ε-CL and ATRP of tBuA in such a system were well controllable. The chain structures of T-A star PCL, T-A star PCL-Br, and T-A star PCL-b-P tBuA were confirmed by 1H NMR spectra. The amphiphilic T-A star PCL3-b-PAA3 has a CMC value of 2.57 × 10−6 g mL−1 and can form ribbon-like aggregates with a width of 200 nm–1 μm in THF/water after removal of THF by dialysis.

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