Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
J Am Chem Soc. 2016 Sep 14;138(36):11501-4. doi: 10.1021/jacs.6b07670. Epub 2016 Sep 1.
We report the synthesis of Janus bottlebrush block copolymers by graft-through polymerization of branched diblock macromonomers. Self-assembly of the bottlebrushes was characterized by small-angle X-ray scattering, atomic force microscopy, and scanning electron microscopy. Phase separation and packing models of the bottlebrushes were computed, and their self-assembly behavior was corroborated experimentally in bulk and in thin films. Lamellar, hexagonal cylinder, and gyroid phases were observed and modeled. The A-branch-B Janus bottlebrush structure provides several unique advantages in the context of bottlebrush polymer assembly, including access to the first examples of gyroid phases.
我们通过支化嵌段大分子的接枝聚合反应合成了 Janus 瓶刷嵌段共聚物。通过小角 X 射线散射、原子力显微镜和扫描电子显微镜对瓶刷的自组装进行了表征。计算了瓶刷的相分离和堆积模型，并通过在本体和薄膜中的实验验证了其自组装行为。观察到并模拟了层状、六方圆柱和中空方型相。A 支-B 支 Janus 瓶刷结构在瓶刷聚合物组装方面提供了几个独特的优势，包括首次获得中空方型相的实例。
