Synthesis and functionalization of ROMP-based gradient copolymers of 5-substituted norbornenes

Christine M. Dettmer, Maisha K. Gray, John M. Torkelson, Son Binh T. Nguyen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Gradient copolymers of exo-5-(benzyloxy)norbornene and exo-5-[(4-tert- butyl)benzyloxy]-norbornene were synthesized via ring-opening metathesis polymerization (ROMP). Kinetic studies revealed that the reactivity ratios of both monomers were close to unity. As predicted, this monomer pair did not result in copolymers with significant gradients under batch polymerization conditions. However, semibatch conditions resulted in copolymers with sizable gradients whose shape was independent of the rate of addition. Addition of the monomers simultaneously via a dual and opposite ramping strategy led to a 50/50 copolymer with an exceptionally linear gradient. These gradient copolymers were further functionalized via hydrogenation, bromination, and bromoalkoxylation.

Original languageEnglish (US)
Pages (from-to)5504-5512
Number of pages9
JournalMacromolecules
Volume37
Issue number15
DOIs
StatePublished - Jul 27 2004

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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