AGET ATRP of Acrylamide in Aqueous Media

Tan, Ying; Yang, Qingbo; Sheng, Dekun; Su, Xiaoqiang; Xu, Kun; Song, Caixia; Wang, Pixin

doi:10.1515/epoly.2008.8.1.266

Cited by 4 publications

(6 citation statements)

References 21 publications

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“…Catalytic (transition metal) is the most important factor for the success of ATRP, which can form transition metal ligands with ligands to regulate the redox reaction between two oxidation states of transition metal complexes. Compared with other catalysts, the ferric ion is not only biocompatible but also suitable for a wide range of monomers . Therefore, FeCl 3 was chosen as the catalyst for the ARGET ATRP initiating system in this work.…”

Section: Resultsmentioning

confidence: 99%

“…Herein, the concentration of active free radicals is always kept at a low level to regulate the rate of polymerization and produce well‐defined polymers with controlled molecular weight and narrow molecular weight distribution. Tan reported a 2‐Cl‐PA/CuCl 2 /Me 6 TREN/Vc initiator/catalyst system, where the controlled polymerization reaction of AM in aqueous media was realized. Results showed that the polymers had a narrow polydispersity level and the first‐order kinetic plots were linear lines.…”

Section: Introductionmentioning

confidence: 99%

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Regulating Gelation Time and Kinetics Analysis Based on the ARGET ATRP Mechanism

Shao

Yue

et al. 2020

Journal of Polymer Science

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A novel activators regenerated by electron transfer (ARGET) atom transfer radical polymerization (ATRP) initiation system composing of an initiator sodium chloroacetate, a catalyst ferric chloride, and a reducing agent ascorbic acid was developed to improve the gelation time of the in situ crosslinked polymer system. The kinetics of polymerization of acrylamide showed features of a living/controlled process in which the concentrations of the growing radicals [P·] are kept constant throughout the polymerization process. Compared with conventional potassium persulfate initiators, the gelation time of the in situ crosslinked polymer system can be improved to 40 h or even longer using the ARGET ATRP initiation system at 80 °C due to the low radical concentration and slow polymerization reaction. Core flooding test showed that the ARGET ATRP initiating system developed could initiate the polymerization reaction of the in situ crosslinked polymer system in the core. However, the gelation time was extended in comparison to that of the result obtained in the bottle, resulting from the dilution and adsorption of ARGET ATRP components during the injection process. The research expands the application field of the ARGET ATRP principle and has a promising prospect on controlling the gelation time of the in situ crosslinked polymer system. © 2020 Wiley Periodicals, Inc. J. Polym. Sci. 2020, 58, 519–527

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regulating Gelation Time and Kinetics Analysis Based on the ARGET ATRP Mechanism

Shao

Yue

et al. 2020

Journal of Polymer Science

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“…ATRP of acrylamide has also been claimed in aqueous media; however, the molecular weight again did not match the theoretical one. Terminated polyacrylamide (loss of the halogen group) has been reported following the ATRP of AM using 2-Cl-PA/CuCl/Me 6 TREN as the initiator/catalyst system in a DMF–water (50–70 vol % DMF) solution .…”

Section: Introductionmentioning

confidence: 90%

“…4,11,23 Low dispersity PAM could be prepared using an activator generated by electron transfer ATRP in water at room temperature. 24 However, the apparent molecular weights were relatively low (<6000 g/mol).…”

Section: ■ Introductionmentioning

confidence: 99%

“…The negative aspects of water on ATRP can be mitigated by performing the polymerizations in an organic–water mixture at low (0 °C) temperatures . ATRP of acrylamide in water at elevated temperatures (>80 °C) has also been reported. ,, Low dispersity PAM could be prepared using an activator generated by electron transfer ATRP in water at room temperature . However, the apparent molecular weights were relatively low (<6000 g/mol).…”

Section: Introductionmentioning

confidence: 99%

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Acrylamide Homopolymers and Acrylamide–N-Isopropylacrylamide Block Copolymers by Atomic Transfer Radical Polymerization in Water

et al. 2012

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Atomic transfer radical polymerization (ATRP) of acrylamide has been accomplished in aqueous media at room temperature. By using methyl 2-chloropropionate (MeClPr) as the initiator and tris[2-(dimethylamino)ethyl]amine (Me 6 TREN)/copper halogenide (CuX) as the catalyst system, different linear polyacrylamides with apparent molecular weights up to >150 000 g/mol were synthesized with dispersities as low as 1.39. The molecular weights agreed well with the theoretical ones at relatively low-medium monomer/initiator ratios (<700:1). Initial chain extension experiments (isolated macroinitiator) resulted in a polymer with bimodal distribution. However, in situ chain extension experiments, carried out by addition of a second fresh batch of monomer to the reaction mixture, confirmed the living nature of the polymerization. By adding a fresh batch of monomer to a linear macroinitiator (M n = 22 780 g/mol, PDI = 1.42) in solution, an increase in the molecular weight up to 30 220 g/mol (PDI = 1.64) was observed. In addition, linear polyacrylamides were used as macroinitiators for the synthesis of block copolymers polyacrylamide-b-poly(N-isopropylacrylamide).

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Controlling gelation time of in situ polymerization of gel system through AGET ATRP principle

Shao

Yue

2020

Iran Polym J

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AGET ATRP of Acrylamide in Aqueous Media

Cited by 4 publications

References 21 publications

Regulating Gelation Time and Kinetics Analysis Based on the ARGET ATRP Mechanism

Regulating Gelation Time and Kinetics Analysis Based on the ARGET ATRP Mechanism

Acrylamide Homopolymers and Acrylamide–N-Isopropylacrylamide Block Copolymers by Atomic Transfer Radical Polymerization in Water

Controlling gelation time of in situ polymerization of gel system through AGET ATRP principle

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