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Buback M, Hutchinson RA, Lacík I. Radical polymerization kinetics of water-soluble monomers. Prog Polym Sci 2023. [DOI: 10.1016/j.progpolymsci.2022.101645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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2
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Agboluaje M, Kaur G, Hutchinson RA. Measurement and Modeling of
N‐tert
‐butyl Acrylamide Radical Homo‐ and Copolymerization with Methyl Acrylate in Ethanol/Water. MACROMOL REACT ENG 2022. [DOI: 10.1002/mren.202200026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maryam Agboluaje
- Department of Chemical Engineering, Dupuis Hall Queen's University Kingston Ontario K7L3N6 Canada
| | - Gagandeep Kaur
- Department of Chemical Engineering, Dupuis Hall Queen's University Kingston Ontario K7L3N6 Canada
| | - Robin A. Hutchinson
- Department of Chemical Engineering, Dupuis Hall Queen's University Kingston Ontario K7L3N6 Canada
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Agboluaje M, Hutchinson RA. Measurement and Modeling of Methyl Acrylate Radical Polymerization in Polar and Nonpolar Solvents. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maryam Agboluaje
- Department of Chemical Engineering, Queen’s University, Dupuis Hall, Kingston, Ontario K7L3N6, Canada
| | - Robin A. Hutchinson
- Department of Chemical Engineering, Queen’s University, Dupuis Hall, Kingston, Ontario K7L3N6, Canada
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Wang Y, Zhang Y. Kinetics of poly(3‐methacryloylamido propyl trimethyl ammonium chloride) initiated by different initiators. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yongji Wang
- School of Chemical Engineering Nanjing University of Science and Technology Nanjing China
| | - Yuejun Zhang
- School of Chemical Engineering Nanjing University of Science and Technology Nanjing China
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Urbanová A, Ezenwajiaku IH, Nikitin AN, Sedlák M, Vale HM, Hutchinson RA, Lacík I. PLP-SEC Investigation of the Influence of Electrostatic Interactions on the Radical Propagation Rate Coefficients of Cationic Monomers TMAEMC and MAPTAC. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Urbanová
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Ikenna H. Ezenwajiaku
- Department of Chemical Engineering, Dupuis Hall, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Anatoly. N. Nikitin
- Istitute on Laser and Information Technologies of Russian Academy of Sciences—Branch of Federal Scientific Research Center “Crystallography and Photonics”, Russian Academy of Sciences, Svyatoozerskaya 1, 140700 Shatura, Moscow Region, Russia
| | - Marián Sedlák
- Institute of Experimental Physics of the Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
| | | | - Robin A. Hutchinson
- Department of Chemical Engineering, Dupuis Hall, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Igor Lacík
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- Centre for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovakia
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6
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Unexpected counterion exchange influencing fundamental characteristics of quaternary ammonium chitosan salt. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123562] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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7
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Kinetics and Modeling of Aqueous Phase Radical Homopolymerization of 3-(Methacryloylaminopropyl)trimethylammonium Chloride and its Copolymerization with Acrylic Acid. Processes (Basel) 2020. [DOI: 10.3390/pr8111352] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The radical homopolymerization kinetics of 3-(methacryloylaminopropyl) trimethylammonium chloride (MAPTAC) and its batch copolymerization with nonionized acrylic acid (AA) in aqueous solution are investigated and modeled. The drift in monomer composition is measured during copolymerization by in situ NMR over a range of initial AA molar fractions and monomer weight fractions up to 0.35 at 50 °C. The copolymer becomes enriched in MAPTAC for monomer mixtures containing up to 60 mol% MAPTAC, but is enriched in AA for MAPTAC-rich mixtures; this azeotropic behavior is dependent on initial monomer content, as electrostatic interactions from the cationic charges influence the system reactivity ratios. Models for MAPTAC homopolymerization and AA-MAPTAC copolymerization are developed to represent the rates of monomer conversion and comonomer composition drifts over the complete range of experimental conditions.
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Evaluation of a Novel Polymeric Flocculant for Enhanced Water Recovery of Mature Fine Tailings. Processes (Basel) 2020. [DOI: 10.3390/pr8060735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The novel cationic flocculant, poly(lactic acid) choline iodide ester methacrylate (poly(PLA4ChMA)), has been shown to provide improved flocculation of 5.0 wt.% mature fine tailings (MFT) diluted in deionized water compared to commercial anionic polymers, with continued dewatering of the sediment occurring as the polymer undergoes partial hydrolytic degradation. However, the elevated dosages (10,000 ppm) required would make the polymer costly to implement on an industrial scale. With this motivation, the impact of MFT loading and the use of process water is explored while comparing the settling performance of poly(PLA4ChMA) to available commercial alternatives such as anionic FLOPAM A3338. Improved consolidation of 5.0 wt.% MFT diluted with process water could be achieved at reduced dosages (500 ppm) with poly(PLA4ChMA). However, the final compaction levels after polymer degradation were similar to those achieved with the nondegradable commercial flocculants. Flocculation-filtration experiments with undiluted MFT are also conducted to compare the performance of the polymers. Significantly faster rates of water release were observed with the cationic flocculants compared to FLOPAM A3338, but no improvement in the overall tailings compaction was found either before or after poly(PLA4ChMA) degradation. Thus, the improved dewatering observed with poly(PLA4ChMA) in dilute MFT suspensions does not extend to conditions that would be encountered in the field.
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Ezenwajiaku IH, Zigelstein R, Chovancová A, Lacík I, Hutchinson RA. Experimental and Modeling Investigations of Aqueous-Phase Radical Copolymerization of 2-(Methacryloyloxyethyl)trimethylammonium Chloride with Acrylic Acid. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06954] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ikenna H. Ezenwajiaku
- Department of Chemical Engineering, Queen’s University, Dupuis Hall, Kingston, Ontario K7L 3N6, Canada
| | - Rachel Zigelstein
- Department of Chemical Engineering, Queen’s University, Dupuis Hall, Kingston, Ontario K7L 3N6, Canada
| | - Anna Chovancová
- Polymer Institute of the Slovak Academy of Sciences, Dubravska cesta 9, Bratislava 845 41, Slovakia
| | - Igor Lacík
- Polymer Institute of the Slovak Academy of Sciences, Dubravska cesta 9, Bratislava 845 41, Slovakia
| | - Robin A. Hutchinson
- Department of Chemical Engineering, Queen’s University, Dupuis Hall, Kingston, Ontario K7L 3N6, Canada
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