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Rapid synthesis of well-defined polyacrylamide by aqueous Cu(0)-mediated reversible-deactivation radical polymerization

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Jones, Glen R., Li, Zaidong, Anastasaki, Athina, Lloyd, Danielle J., Wilson, Paul, Zhang, Qiang and Haddleton, David M. (2016) Rapid synthesis of well-defined polyacrylamide by aqueous Cu(0)-mediated reversible-deactivation radical polymerization. Macromolecules, 49 (2). pp. 483-489. doi:10.1021/acs.macromol.5b01994

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Official URL: http://dx.doi.org/10.1021/acs.macromol.5b01994

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Abstract

Atom transfer radical polymerization (ATRP) of acrylamide (AM) has proved challenging, typically exhibiting low conversions and broad molecular weight distributions (MWDs). Herein, we report the synthesis of well-defined polyacrylamide (both homo and block copolymers) via aqueous copper(0)-mediated reversible-deactivation radical polymerization (Cu(0)-RDRP), exploiting the in situ disproportionation of Cu(I)Br in the presence of Me6Tren to yield insoluble Cu(0) and Cu(II)Br2 which acts as a deactivator. Careful optimization of the levels of Cu(I)Br and Me6TREN allowed for the synthesis of polyacrylamide of a range of molecular weights (DPn = 20–640) proceeding to quantitative conversion within just a few minutes (typically full conversion is attained within 15 min of reaction time) and exhibiting narrow MWDs (Đ as low as 1.09), which represents a significant improvement over transitional-metal-mediated approaches previously reported in the literature. This optimized approach was subsequently utilized to perform in situ chain extensions and block copolymerizations with hydroxyethyl acrylamide, yielding block copolymers of low dispersity and quantitative monomer conversions in a time frame of minutes.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TP Chemical technology
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Polyacrylamide, Polymerization
Journal or Publication Title: Macromolecules
Publisher: American Chemical Society
ISSN: 0024-9297
Official Date: 26 January 2016
Dates:
DateEvent
26 January 2016Published
7 January 2016Accepted
Volume: 49
Number: 2
Page Range: pp. 483-489
DOI: 10.1021/acs.macromol.5b01994
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: University of Warwick, Lubrizol Ltd., Badische Anilin- & Soda-Fabrik (BASF), Royal Society (Great Britain). Wolfson Research Merit Award (RSWRMA)

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