Aqueous Ring-Opening Metathesis Polymerization of carboximide-functionalized 7-oxanorbornenes

Marc A. Hillmyer, Christine Lepetit, Dominic V. McGrath, Dominic V Mcgrath, Robert H. Grubbs

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98 Scopus citations


The ring-opening metathesis polymerization (ROMP) of exo-N-methyl-7-oxabicyclo[2.2.1]-hept-5-ene-2,3-dicarboximide (1) was accomplished in aqueous solution under mild conditions using the simple ruthenium(II) coordination complex RuII(H2O)6(tos)2 (tos = p-toluenesulfonate) (2). The polymerization yield was nearly quantitative. The resultant high molecular weight polymer (poly-1) exhibited a glass transition temperature (Tg) of 225°C and was thermally stable up to 402°C. The thermal and radiative stabilities of poly-1 were further investigated. Poly-1 was hydrogenated to yield its saturated analogue, which had a lower Tg (170°C) but a higher temperature of decomposition (430°C). Complex 2 was deactivated by coordination of free maleimides formed during the polymerization of carboximide-functionalized monomers capable of undergoing retro Diels-Alder chemistry. The scope of this polymerization was therefore limited to carboximide-functionalized monomers that are stable toward retro Diels-Alder reactions at the polymerization temperature. Both ruthenium (II)-1 and ruthenium(II)-N-methylmaleimide olefin complexes were identified.

Original languageEnglish (US)
Pages (from-to)3345-3350
Number of pages6
Issue number13
Publication statusPublished - 1992
Externally publishedYes


ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Hillmyer, M. A., Lepetit, C., McGrath, D. V., Mcgrath, D. V., & Grubbs, R. H. (1992). Aqueous Ring-Opening Metathesis Polymerization of carboximide-functionalized 7-oxanorbornenes. Macromolecules, 25(13), 3345-3350.