Two-Dimensional Chromatography of Complex Polymers, 7 – Detailed Study of Polystyrene-block-Polyisoprene Diblock Copolymers Prepared by Sequential Anionic Polymerization and Coupling Chemistry

Authors

  • Valentina Mass,

    1. Deutsches Kunststoff-Institut (German Institute for Polymers), Schlossgartenstr. 6, 64289 Darmstadt, Germany
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  • Vasilios Bellas,

    1. Ernst-Berl-Institute for Chemical Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstr. 22, 64287 Darmstadt, Germany
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  • Harald Pasch

    Corresponding author
    1. University of Stellenbosch, Department of Chemistry and Polymer Science, Private Bag X1, 7602 Matieland, South Africa
    • University of Stellenbosch, Department of Chemistry and Polymer Science, Private Bag X1, 7602 Matieland, South Africa.
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Abstract

Two-dimensional chromatographic methods were developed using LC-CC in the first and SEC in the second dimension. These methods were applied for the investigation of PS-b-PI diblock copolymers synthesized by different approaches: sequential living anionic polymerization and coupling of living precursor blocks. The first dimension separates according to the individual block length of PS or PI blocks, whereas the second dimension separates with respect to the total molar masses of components. 2D-LC analysis provides information on the purity of the reaction products, the presence of by-products, the chemical compositions and the molar masses of all product components. The accuracy and selectivity of 2D-LC is discussed.

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