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Flow-induced crystallization of polyethylene melts

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Abstract

In situ optical observations have been made of the way polyethylene melt can crystallize whilst subject to certain longitudinal velocity gradients. In general crystallization is seen to occur as the generation of fibres 5 to 50 μm in diameter. Hydrodynamic considerations lead to the conclusion that the externally applied velocity field is responsible for the nucleation of the fibrous crystals, subsequent growth is then influenced by both the local streaming of polymer melt around the growing tip of the fibre and the external velocity field. The effect enhanced pressure has on flow induced crystallization is also examined.

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Authors and Affiliations

  1. H. H. Wills Physics Laboratory, University of Bristol, Bristol, UK

    M. R. Mackley, F. C. Frank & A. Keller

Authors
  1. M. R. Mackley
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  2. F. C. Frank
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  3. A. Keller
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Mackley, M.R., Frank, F.C. & Keller, A. Flow-induced crystallization of polyethylene melts. J Mater Sci 10, 1501–1509 (1975). https://doi.org/10.1007/BF01031850

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  • DOI: https://doi.org/10.1007/BF01031850

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