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Journal of Polymer Research
Erschienen in: Journal of Polymer Research 10/2013

01.10.2013 | Original Paper

A comprehensive study on the kinetics of aqueous free-radical homo- and copolymerization of acrylamide and diallyldimethylammonium chloride by online 1H-NMR spectroscopy

verfasst von: Mahdi Abdollahi, Farshid Ziaee, Parisa Alamdari, Hadis Koolivand

Erschienen in: Journal of Polymer Research | Ausgabe 10/2013

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Abstract

Free-radical homo- and copolymerization of acrylamide (AAm) and diallyldimethylammonium chloride (DADMAC) initiated with potassium persulfate (KPS) were performed in the presence of 0.1 M NaCl solution in D2O at 50 °C. Online 1H-NMR kinetic experiments were used to study polymerization kinetics via determination of the individual and overall conversion of the comonomers and compositions of the comonomer mixture and produced copolymer as a function of the reaction time. Reactivity ratios of the AAm and DADMAC were calculated by Mao-Huglin (MH) and extended Kelen-Tudos (KT) methods to be 7.0855 ± 1.3963, 0.1216 ± 0.0301 and 6.9458 ± 2.0113, 0.1201 ± 0.0437 respectively. “Lumped” kinetic parameter (k p k t − 0.5 ) was estimated from experimental data. Results showed that k p k t − 0.5 value increases by increasing mole fraction of the AAm in the initial reaction mixture. Drift in the comonomer mixture and copolymer compositions with reaction progress was evaluated experimentally and theoretically. Theoretical values were calculated from Meyer-Lowry equation by using reactivity ratios obtained from MH method. A good fitting between the experimental and theoretical values was observed, indicating accuracy of the reactivity ratios estimated in the present work. It was found from following changes in the copolymer composition with the comonomer conversion that produced copolymer has a statistical structure.
Nächster Artikel Nano-Calcium carbonate (CaCO3)/Polystyrene (PS) core-shell nanoparticle: It’s effect on physical and mechanical properties of high impact polystyrene (HIPS)

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Metadaten
Titel
A comprehensive study on the kinetics of aqueous free-radical homo- and copolymerization of acrylamide and diallyldimethylammonium chloride by online 1H-NMR spectroscopy
verfasst von
Mahdi Abdollahi
Farshid Ziaee
Parisa Alamdari
Hadis Koolivand
Publikationsdatum
01.10.2013
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 10/2013
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-013-0239-9

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