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The copolymerization of N-vinyl-2-pyrrolidone with 2-hydroxyethyl methacrylate

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Summary

The bulk free radical copolymerization of 2-hydroxyethyl methacrylate (HEMA) with N-vinyl-2-pyrrolidone (VP) was carried out to low conversions at 50 °C, using benzoyl peroxide (BPO) as initiator. The compositions of the copolymers were determined using 13C NMR spectroscopy. The conversion of monomers to polymers was studied using FT-NIR spectroscopy in order to predict the extent of conversion of monomer to polymer. From model fits to the composition data, a statistical F-test revealed that the penultimate model describes the copolymerization better than the terminal model. Reactivity ratios were calculated by using a non-linear least squares analysis (NLLS) and r H = 8.18 and r V = 0.097 were found to be the best fit values of the reactivity ratios for the terminal model and r HH = 12.0, r VH = 2.20, r VV = 0.12 and r HV = 0.03 for the penultimate model. Predictions were made for changes in compositions as a function of conversion based upon the terminal and penultimate models.

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Authors and Affiliations

  1. Polymer Materials and Radiation Group, Department of Chemistry, University of Queensland, QLD 4072, Australia e-mail: hill@chemistry.uq.edu.au, Fax: +61 7 3365 4299, , , , , , AU

    Magdy M. Faragalla & David J. T. Hill

  2. Centre for Magnetic Resonance, University of Queensland, QLD 4072, Australia, , , , , , AU

    Andrew K. Whittaker

Authors
  1. Magdy M. Faragalla
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  2. David J. T. Hill
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  3. Andrew K. Whittaker
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Received: 27 Febuary 2001/Revised version: 5 November 2001/Accepted: 6 November 2001

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Faragalla, M., Hill, D. & Whittaker, A. The copolymerization of N-vinyl-2-pyrrolidone with 2-hydroxyethyl methacrylate. Polymer Bulletin 47, 421–427 (2002). https://doi.org/10.1007/s002890200004

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  • DOI: https://doi.org/10.1007/s002890200004

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