Extensive Expansion of Spherical Region of A(AB<sub>3</sub>)<sub>3</sub> Dendron-like Miktoarm Star Copolymer
발표자
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초록
내용
Controlling the fare volume fraction of the spherical structure is challenging because of its large interfacial curvature. Miktoarm star copolymer is an efficient way to form spherical structures with larger fares because its short chains form spontaneous curvature as they are spread out. Here, we synthesized A(AB3)3 miktoarm star copolymer using polystyrene (PS) (A) and poly(2-vinylpyridine) (P2VP) (B). A series of anionic polymerization, ATRP, and click reaction was employed to produce this complex model with low dispersity. A body-centered cubic (BCC) spherical structure was formed at fPS = 0.51, however, the PS blocks became spheres rather than a matrix. The dual chain generation of A and B blocks in A(AB3)3 maximized its interfacial curvature, allowing the stabilization of a spherical phase even at fA > 0.50. These experimental results were also consistent with those predicted using self-consistent field theory (SCFT).