title: Graft-through Synthesis and Assembly of Janus Bottlebrush Polymers from A-Branch-B Diblock Macromonomers.
abstract: 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.
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors: Ken
authors: K
authors: Kawamoto
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors: Mingjiang
authors: M
authors: Zhong
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors: Karim R
authors: KR
authors: Gadelrab
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors: Li-Chen
authors: LC
authors: Cheng
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors: Caroline A
authors: CA
authors: Ross
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors: Alfredo
authors: A
authors: Alexander-Katz
authors: Department of Chemistry and ‡Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors: Jeremiah A
authors: JA
authors: Johnson
mesh_terms: D060326:Chemistry Techniques, Synthetic; D008958:Models, Molecular; D008968:Molecular Conformation; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D011108:Polymers