Controlling the Structural Parameters and Resulting Morphologies of Poly(vinylpyridine)-Containing Brush Block Copolymers by Combining Grafting-through and Grafting-to Approaches
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초록
내용
Synthesis of brush block copolymers (brush BCPs) enables the generation of BCPs with various block compositions and chain architectures. Here, we report a synthetic strategy for preparing structurally diverse, poly(vinylpyridine)-containing brush BCPs via combined synthesis of grafting-through and grafting-to approach. The precursor BCP with an azide functionality is synthesized by sequential ring-opening metathesis polymerization of norbornene-based macromonomers, followed by post-polymerization modification. The final brush BCPs are then prepared by grafting various side chain polymers onto the precursor BCPs. This synthetic method is versatile in producing brush BCPs with various side chain types, backbone lengths, and grafting densities. In particular, it is observed that the morphologies of the brush BCPs can be controlled from lamella to cylinders to spheres by tuning the grafting densities, which could be elucidated by the simulation results.