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Morphology and deformation behaviour of SBS/PS blends: a combined microscopic and spectroscopic study

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Abstract

Correlation between morphology and micromechanical deformation behaviour of blends consisting of a lamellae-forming linear styrene/butadiene block copolymer and polystyrene homopolymer (hPS) was studied by different microscopic techniques (transmission electron microscopy and scanning electron microscopy) and rheo-optical Fourier transformed infrared spectroscopy. Attributable to a change in morphology from well-ordered lamellae to a distorted one, a transition in deformation mechanism from homogeneous plastic flow of the lamellae to formation of local craze-like deformation zones was observed on addition of hPS. The latter led to a drastic reduction in elongation at break. An abrupt depression in the degree of orientation of the polystyrene (PS) and the polybutadiene (PB) phases in the blends suggested that the failure occurs at the interface between the added hPS and PS blocks of the block copolymer.

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Acknowledgements

This research was funded by the government of Sachsen-Anhalt (Project: Neue Funktionswerkstoffe auf der Grundlage schwachentmischter Blockcopolymere) and the German Science Foundation (Project: Transferinitiative—Neue Polymermaterialien and SFB 418). We thank S. Goerlitz (Halle) for the TEM investigations and Prof. W. Grellmann (Halle) for the facility for tensile testing. The research scholarship from Max-Buchner-Forschungsstiftung (MBFSt 6052 and MBFSt 2280) is acknowledged.

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Authors and Affiliations

  1. Institute of Materials Science, Martin Luther University Halle-Wittenberg, D-06099, Halle/Saale, Germany

    Rameshwar Adhikari, Trinh An Huy, Sven Henning & Goerg H. Michler

  2. Polymer Research, BASF Aktiengesellschaft ZKT/I-B1, D-67056, Ludwigshafen, Germany

    Konrad Knoll

Authors
  1. Rameshwar Adhikari
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  2. Trinh An Huy
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  3. Sven Henning
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  4. Goerg H. Michler
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  5. Konrad Knoll
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Correspondence to Rameshwar Adhikari.

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Adhikari, R., Huy, T.A., Henning, S. et al. Morphology and deformation behaviour of SBS/PS blends: a combined microscopic and spectroscopic study. Colloid Polym Sci 282, 1381–1391 (2004). https://doi.org/10.1007/s00396-004-1085-4

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  • DOI: https://doi.org/10.1007/s00396-004-1085-4

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