'Plug-and-play' aqueous electrochemical atom transfer radical polymerization of acrylamide. Mohammed, M. & Wilson, P. EUROPEAN POLYMER JOURNAL, May, 2024. doi abstract bibtex Copper-mediated reversible deactivation radical polymerization of the acrylamide monomer has been found to be a challenging process. It has generally not been explored in great detail, despite the many commercial applications of polyacrylamide (PAm). In addition, the recently reported 'plug-and-play ' methodology enabled by the Electrasyn Pro 2.0 device has not yet been widely adopted. Herein, the controlled aqueous electrochemical atom transfer radical polymerization (eATRP) of acrylamide in pure aqueous media is demonstrated using our potentiostatic 'plug-and-play ' methodology. It was found that in the presence of high concentrations of electrolyte (0.5 M KNO3) there is good control over molecular weight and dispersity, but little electrochemical control over the reaction kinetics. Upon decreasing the concentration of KNO3 (0.1 M) and adding NaBr (6.9 mM), good control over molecular weight and dispersity was retained e.g. when targeting DPn,th = 100, 91 % conversion was obtained within 7 h yielding polyacrylamide (PAm) with M-n,M-SEC = 5300 gmol(-1) (M-n,M-th = 6500 gmol(-1) ) and (D) over bar (m) = 1.24. Furthermore, under these conditions, the desirable electrochemical control over the reaction was observed. The ability to target different chain lengths (D-Pn,D-th = 25 -100) was also demonstrated, with good agreement between M-n,M-SEC and M-n,M-th exemplifying the use of the 'plug-and-play ' eATRP methodology for controlled polymerization of acrylamide.
@article{mohammed_plug-and-play_2024,
title = {'{Plug}-and-play' aqueous electrochemical atom transfer radical polymerization of acrylamide},
volume = {211},
issn = {0014-3057},
doi = {10.1016/j.eurpolymj.2024.113028},
abstract = {Copper-mediated reversible deactivation radical polymerization of the acrylamide monomer has been found to be a challenging process. It has generally not been explored in great detail, despite the many commercial applications of polyacrylamide (PAm). In addition, the recently reported 'plug-and-play ' methodology enabled by the Electrasyn Pro 2.0 device has not yet been widely adopted. Herein, the controlled aqueous electrochemical atom transfer radical polymerization (eATRP) of acrylamide in pure aqueous media is demonstrated using our potentiostatic 'plug-and-play ' methodology. It was found that in the presence of high concentrations of electrolyte (0.5 M KNO3) there is good control over molecular weight and dispersity, but little electrochemical control over the reaction kinetics. Upon decreasing the concentration of KNO3 (0.1 M) and adding NaBr (6.9 mM), good control over molecular weight and dispersity was retained e.g. when targeting DPn,th = 100, 91 \% conversion was obtained within 7 h yielding polyacrylamide (PAm) with M-n,M-SEC = 5300 gmol(-1) (M-n,M-th = 6500 gmol(-1) ) and (D) over bar (m) = 1.24. Furthermore, under these conditions, the desirable electrochemical control over the reaction was observed. The ability to target different chain lengths (D-Pn,D-th = 25 -100) was also demonstrated, with good agreement between M-n,M-SEC and M-n,M-th exemplifying the use of the 'plug-and-play ' eATRP methodology for controlled polymerization of acrylamide.},
urldate = {2024-05-30},
journal = {EUROPEAN POLYMER JOURNAL},
author = {Mohammed, Mahir and Wilson, Paul},
month = may,
year = {2024},
}
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