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

doi:10.1002/pola.20760

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

Applied Research Laboratory (ARL)

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

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 language	English (US)
Pages (from-to)	2657-2665
Number of pages	9
Journal	Journal of Polymer Science, Part A: Polymer Chemistry
Volume	43
Issue number	12
DOIs	https://doi.org/10.1002/pola.20760
State	Published - Jun 15 2005

All Science Journal Classification (ASJC) codes

Polymers and Plastics
Organic Chemistry
Materials Chemistry

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10.1002/pola.20760

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title = "Synthesis and characterization of fluorene end-labeled polystyrene with atom transfer radical polymerization",

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.",

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

AU - Goodman, Caton C.

AU - Roof, Amanda C.

AU - Tillman, Eric S.

AU - Ludwig, Bellamarie

AU - Chon, Dougie

AU - Weigley, Michael I.

PY - 2005/6/15

Y1 - 2005/6/15

N2 - 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.

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

Abstract

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