Poly(phenylnorbornene) from ring-opening metathesis and its hydrogenated derivatives

Sheng Li, Adam B. Burns, Richard A. Register, Andrew Bell

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14 Scopus citations


Novel polymers are synthesized from 5-phenyl-2-norbornene (PhNb) and its saturated side group analog, 5-cyclohexyl-2-norbornene, using ring-opening metathesis polymerization (ROMP). Polymers of both endo-rich and all-exo PhNb show glass transition temperatures (T g) = 88 ± 1 °C, indicating a negligible effect of monomer stereoisomerism on segmental packing or the energy barriers to motion at the glass transition, despite the substantial size of the side group. Post-polymerization hydrogenation of the PhNb polymers using catalysts with different selectivities reveals that saturation of the backbone produces a 17°C decrease in T g (for both aromatic and cycloaliphatic side groups), whereas saturation of the side groups produces a 14°C increase in T g (for both saturated and unsaturated backbones).

Original languageEnglish (US)
Pages (from-to)2027-2033
Number of pages7
JournalMacromolecular Chemistry and Physics
Issue number19
StatePublished - Oct 15 2012

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Materials Chemistry
  • Polymers and Plastics
  • Physical and Theoretical Chemistry
  • Organic Chemistry


  • glass transition
  • isomer/isomerization
  • living polymerization
  • noncrystalline polymers
  • ring-opening metathesis polymerization


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