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. 2020 Jun 10;6(24):eaaz7202. doi: 10.1126/sciadv.aaz7202

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Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

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Fig. 1 — (A) Seed anionic ring opening polymerization of hexamethylcyclotrisiloxane to produce PDMS macromonomers. (B) 8-diazabicyclo[5.4.0]undec-7-ene (DBU) catalyzed ring opening polymerization of lactide to produce PLA macromonomers. (C) Sequential graft-through ring-opening metathesis polymerization (ROMP) of PDMS and PLA macromonomers. (D) Molecular weight versus time plot for the synthesis of PDMS-b-PLA bottlebrush. PDMS macromonomers are polymerized first (t < 30 min), and then PLA macromonomers are added and polymerized (t > 30 min). (E) Image of dried, as-synthesized bottlebrush stock material. (F) Microscope camera image of a drop-cast film taken at normal incidence under a ring light. Photograph courtesy of Bijal Patel, University of Illinois.