Characterization of the chemical composition of a block copolymer by liquid chromatography/mass spectrometry using atmospheric pressure chemical ionization and electrospray ionization

Authors

  • Suze M. van Leeuwen,

    1. Chemical Analysis Group and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
    2. Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstr. 30, 48149 Münster, Germany
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  • BoonHua Tan,

    1. Department of Polymer Chemistry and Biomaterials, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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  • Dirk W. Grijpma,

    1. Department of Polymer Chemistry and Biomaterials, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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  • Jan Feijen,

    1. Department of Polymer Chemistry and Biomaterials, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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  • Uwe Karst

    Corresponding author
    1. Chemical Analysis Group and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
    2. Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstr. 30, 48149 Münster, Germany
    • Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstr. 30, 48149 Münster, Germany.
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Abstract

Liquid chromatography/mass spectrometry (LC/MS) with electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) in the positive and negative ion modes was used for the characterization of a block copolymer consisting of methoxy poly(ethylene oxide) (mPEO), an ε-caprolactone (CL) segment and linoleic acid (LA), used as surfactant in water-based latex paints. Chromatographic separation was obtained based on the number of CL units in the polymer species and the presence of an mPEO and/or LA tail. Different ionization methods were found to be complementary and only their combination allowed the qualitative profiling of the chemical composition. The LC/MS method has proven valuable for following the reaction in time, as well as for comparison of different polymeric surfactants. Copyright © 2007 John Wiley & Sons, Ltd.

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