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Published April 28, 2009 | Supplemental Material
Journal Article Open

Functionalized hyperbranched polymers via olefin metathesis


Hyperbranched polymers are highly branched, three-dimensional macromolecules which are closely related to dendrimers and are typically prepared via a one-pot polycondensation of AB_(n≥2) monomers.^1 Although hyperbranched macromolecules lack the uniformity of monodisperse dendrimers, they still possess many attractive dendritic features such as good solubility, low solution viscosity, globular structure, and multiple end groups.^1-3 Furthermore, the usually inexpensive, one-pot synthesis of these polymers makes them particularly desirable candidates for bulk-material and specialty applications. Toward this end, hyperbranched polymers have been investigated as both rheology-modifying additives to conventional polymers and as substrate-carrying supports or multifunctional macroinitiators, where a large number of functional sites within a compact space becomes beneficial.

Additional Information

© 2009 American Chemical Society. Received December 2, 2008. Revised Manuscript Received February 24, 2009. Publication Date (Web): March 26, 2009. The authors gratefully acknowledge Materia, Inc., for the generous gift of catalyst 1. We thank Wyatt Technology Corp., especially Dr. Michelle Chen and Dr. Jeffrey Ahlgren, for help with the SEC analysis and instrumentation. We also thank Dr. Rosemary Conrad for invaluable discussions. E.V.V. acknowledges financial support from SURF program at Caltech. This research was supported by the office of Naval Research (ONR) through the Multidisciplinary University Research Initiative (MURI) program and NSF. Experimental protocols with full characterizations for the synthesis of 4, 6, and 7; functionalization procedure for 5 and polymerization procedure for 8. This material is available free of charge via the Internet at http://pubs.acs.org.

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