Free-radical copolymerization of styrene and itaconic acid studied by1H NMR kinetic experiments

Barner-Kowollik, C., Heuts, J. P. A., & Davis, T. P. (2001) Free-radical copolymerization of styrene and itaconic acid studied by1H NMR kinetic experiments. Journal of Polymer Science, Part A: Polymer Chemistry, 39(5).

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The free-radical copolymerization of itaconic acid (IA) and styrène in solutions of dimethylformamide and d6-dimethyl sulfoxide (50 wt %) has been studied by 1H NMR kinetic experiments. Monomer conversion versus time data were used to estimate the ratio kp · kt -0.5 for various comonomer mixture compositions. The ratio kp · kt -0.5 varies from 5.2 ·10-2 for pure styrene to 2.0 · 10-2 mol-0.5 L-0.5 s-0.5 for pure IA, indicating a significant decrease in the rate of polymerization. Individual monomer conversion versus time traces were used to map out the comonomer mixture-composition drift up to overall monomer conversions of 60%. Within this conversion range, a slight but significant depletion of styrène in the monomer feed can be observed. This depletion becomes more pronounced at higher levels of IA in the initial comonomer mixture. The kinetic information is supplemented by molecular weight data for IA/ styrène copolymers obtained by variation of the comonomer mixture composition. A significant decrease in molecular weight of a factor of 2 can be observed when increasing the mole fraction of IA in the initial reaction mixture from 0 to 0.5. © 2001 John Wiley & Sons, Inc.

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ID Code: 99044
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :29
Export Date: 5 September 2016
Correspondence Address: Davis, T.P.; Centre for Advanced Macromolecular Design, School of Chemical Engineering and Industrial Chemistry, University of New South Wales, NSW 2052, Sydney, Australia; email:
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Keywords: 1H NMR, Itaconic acid/styrene copolymerization, Molecular weight, Ratio of propagation-to-termination rate coefficients, Reactivity ratios, Carboxylic acids, Copolymerization, Free radical polymerization, Monomers, Nuclear magnetic resonance spectroscopy, Polystyrenes, Free radical copolymerization, Itaconic acid, Copolymers
ISSN: 0887624X
Divisions: Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 28 Jun 2017 13:02

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