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Published June 20, 2011 | Supplemental Material
Journal Article Open

Synthesis and Direct Imaging of Ultrahigh Molecular Weight Cyclic Brush Polymers


Convenient route to cyclic polymers: Ultrahigh molecular weight cyclic brush polymers were synthesized through ring-expansion metathesis polymerization of various macromonomers. Atomic force microscopy was used to visualize toroidal shapes and large opening pores, along with linear chains, which may result from high sensitivity of brush polymers to mechanical degradation.

Additional Information

© 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Received: March 16, 2011; Revised: April 7, 2011; Published online: May 17, 2011. This work was supported by the Department of Energy (DE-FG02-05ER46218) and the Army Research Office (W911NF-9-1-0512). We gratefully acknowledge Prof. James R. Heath for use of the AFM.

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