Synthesis and characterization of fluorene end-labeled polystyrene with atom transfer radical polymerization

Caton C. Goodman, Amanda C. Roof, Eric S. Tillman, Bellamarie Ludwig, Dougie Chon, Michael I. Weigley

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Fluorene end-labeled polystyrene was prepared by atom transfer radical polymerization with 9-bromofluorene as the initiator. Reactions were carried out in bulk or tetrahydrofuran solutions at temperatures of 80°C or above. Analysis by gel permeation chromatography indicated that the polymers formed had low polydispersities with molecular weights consistently 2-5 times higher than calculated based on monomer-to-initiator ratios. Coupling of two fluorenyl radicals, formed by activation of the 9-bromofluorene, was found to compete with initiation, leading to the higher-than-expected molecular weight values while giving rise to a fluorene dimer. UV-vis spectrometry indicated near-quantitative fluorene labeling of the polystyrene.

Original languageEnglish (US)
Pages (from-to)2657-2665
Number of pages9
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume43
Issue number12
DOIs
StatePublished - Jun 15 2005

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Atom transfer radical polymerization
Polystyrenes
Molecular weight
Gel permeation chromatography
Polydispersity
Dimers
Labeling
Spectrometry
Monomers
Chemical activation
Polymers
Temperature
fluorene

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Goodman, Caton C. ; Roof, Amanda C. ; Tillman, Eric S. ; Ludwig, Bellamarie ; Chon, Dougie ; Weigley, Michael I. / Synthesis and characterization of fluorene end-labeled polystyrene with atom transfer radical polymerization. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2005 ; Vol. 43, No. 12. pp. 2657-2665.
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Synthesis and characterization of fluorene end-labeled polystyrene with atom transfer radical polymerization. / Goodman, Caton C.; Roof, Amanda C.; Tillman, Eric S.; Ludwig, Bellamarie; Chon, Dougie; Weigley, Michael I.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 43, No. 12, 15.06.2005, p. 2657-2665.

Research output: Contribution to journalArticle

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T1 - Synthesis and characterization of fluorene end-labeled polystyrene with atom transfer radical polymerization

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AU - Weigley, Michael I.

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AB - Fluorene end-labeled polystyrene was prepared by atom transfer radical polymerization with 9-bromofluorene as the initiator. Reactions were carried out in bulk or tetrahydrofuran solutions at temperatures of 80°C or above. Analysis by gel permeation chromatography indicated that the polymers formed had low polydispersities with molecular weights consistently 2-5 times higher than calculated based on monomer-to-initiator ratios. Coupling of two fluorenyl radicals, formed by activation of the 9-bromofluorene, was found to compete with initiation, leading to the higher-than-expected molecular weight values while giving rise to a fluorene dimer. UV-vis spectrometry indicated near-quantitative fluorene labeling of the polystyrene.

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