Crystallization-Driven Self-Assembly of Stereoblock Copolymers to Form 3D Crystals by Controlling the Stereochemical Sequence of Discrete Poly(D-lactic acid-b-L-lactic acid)
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초록
내용
Crystallization-Driven Self-Assembly, employing block copolymers with a crystallizable core-forming block, has emerged as a technique capable of producing 1D fiber-like and 2D platelet micelles. Recent advancements have revealed numerous promising applications such as nanomedicine. Moreover, continuous attempts are underway to broaden the scope of applicability. However, they were constrained to reaction at end-functional group of 1D or 2D micelles with limitations such as low height or absorption onto a surface. Surprisingly, we have obtained 3D triangular microstructures with ~550 nm height, which is unusual phenomenon in CDSA. It has been achieved with discrete poly(lactic acid)s, which are mismatched stereoblock copolymer, [DLA32]-b-[LLA16]. We assume that extra D-lactic acids act as a important role in producing 3D microstructures, by stacking 2D platelet crystals to 3D crystals. We believe that this study can open the possibility of huge diversity of applications for future advanced polymeric materials.