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Published February 10, 2009 | Accepted Version + Supplemental Material
Journal Article Open

The Living ROMP of trans-Cyclooctene


The living ring-opening metathesis polymerization (ROMP) of trans-cyclooctene (tCO) was investigated. ROMP of tCO in the presence of PPh_3 in THF leads to the formation of narrowly dispersed polycyclooctene (PCO). The presence of PPh3 as an additive and the use of THF as a solvent were demonstrated to be necessary to suppress competing secondary metathesis processes in the ROMP of tCO. Under optimal conditions, narrowly dispersed PCO was achieved without high molecular weight contaminates. The PCO was then hydrogenated to form linear, narrowly dispersed polyethylene with a melting temperature of 139 °C. Protected, hydroxy-functionalized tCO was polymerized by this method to afford narrowly dispersed, hydroxylated PCO. Block copolymers containing polynorbornene and PCO or containing differentially functionalized PCO were also synthesized and hydrogenated to form block copolymers containing blocks of linear, narrowly dispersed polyethylene.

Additional Information

© 2009 American Chemical Society. Received July 26, 2008; Revised Manuscript Received December 2, 2008. Publication Date (Web): January 13, 2009. This work was supported by the National Science Foundation. R.M.C thanks the National Institutes of Health and the Beckman Institute at Caltech for postdoctoral fellowships. The authors thank John B. Matson, Paul C. Clark, and Yan Xia for helpful discussions and critical reading of this manuscript. Supporting Information Available: Figure showing a DSC chart for hydrogenated polyethylene and PNb-b-PCO. This material is available free of charge via the Internet at http://pubs.acs.org. Note Added After ASAP Publication. This article posted ASAP on January 13, 2009. References 39 and 40 have been revised. The correct version posted on January 16, 2009.

Attached Files

Accepted Version - nihms187580.pdf

Supplemental Material - Walker2009p27310.1021ma801693q_supp.pdf


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