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Effect of lamellar thickness on the epitaxial crystallization of PE on oriented iPP films

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Summary

The effects of lamellar thickness on the epitaxial crystallization of polyethylene on the oriented isotatic polypropylene have been studied by means of transmission electron microscopy. The results obtained from the bright field electron microscopy and electron diffraction show that the epitaxial orientation of the PE crystals on the iPP substrate depends not only on the thickness of the oriented iPP lamellae, but also on the lamellar thickness of PE crystals. No epitaxial orientation relationship between PE crystal and iPP substrate can be found, when the PE crystals are thicker than the lamellar thickness of iPP along the matching direction. This suggests, that the epitaxial nucleation of PE in the PE/iPP epitaxial system is controlled not only by the chain-row matching, but also by a secondary nucleation process.

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Authors and Affiliations

  1. Institute of Materials Science, Department of Chemical Engineering, University of Dortmund, D-44221, Dortmund, Germany

    Shouke Yan & Jürgen Petermann

  2. Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130012, Changchun, P.R. China

    Decai Yang

Authors
  1. Shouke Yan
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  2. Jürgen Petermann
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  3. Decai Yang
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Yan, S., Petermann, J. & Yang, D. Effect of lamellar thickness on the epitaxial crystallization of PE on oriented iPP films. Polymer Bulletin 38, 87–94 (1997). https://doi.org/10.1007/s002890050023

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  • DOI: https://doi.org/10.1007/s002890050023

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