Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published July 16, 2003 | Supplemental Material
Journal Article Open

Synthesis of Cyclic Polybutadiene via Ring-Opening Metathesis Polymerization: The Importance of Removing Trace Linear Contaminants


The synthesis of cyclic polybutadienes using ring-opening metathesis polymerization (ROMP) was accomplished. A cyclic Ru alkylidene catalyst, where a terminal ligand was covalently linked to the Ru alkylidene, was used to polymerize either 1,5-cyclooctadiene (COD) or 1,5,9-trans-cis-trans-cyclododecatriene (CDT). Trace amounts of an acyclic impurity, 4-vinylcyclohexene, found in the COD led to samples which were contaminated with linear polymer. In contrast, CDT, which was free of the impurity, afforded pure cyclic polymer. These results provide a convenient method for discerning samples of pure cyclic polymer from those which contain trace to large amounts of linear polymer. Furthermore, they emphasize the need to use monomers that are free of acyclic impurities when preparing cyclic polymers using ROMP.

Additional Information

© 2003 American Chemical Society. Received 5 February 2003. Published online 18 June 2003. Published in print 1 July 2003. We are grateful to the National Science Foundation (NSF) for their support of this research.

Attached Files

Supplemental Material - ja034524lsi20030519_042331.pdf


Files (30.6 kB)
Name Size Download all
30.6 kB Preview Download

Additional details

August 19, 2023
October 25, 2023