Elsevier

Polymer

Volume 35, Issue 16, August 1994, Pages 3442-3448
Polymer

Polymer paper
Microvoid formation process during the plastic deformation of β-form polypropylene

https://doi.org/10.1016/0032-3861(94)90906-7Get rights and content

Abstract

The microvoid formation process that takes place during the plastic deformation of β-form polypropylene (PP) was investigated at different crystallization and drawing temperatures. It was found that the porosity increased with both a higher crystallization temperature and a lower drawing temperature. This fact could be understood in terms of the stability of the β crystals of the original film. The more stable β crystals that formed at a higher crystallization temperature had a lower molecular chain mobility and thus hindered the bulk contraction of the film, while at the same time the volume contraction caused by either a β-α or a β-smectic transformation inside the film enlarged the microvoids at the end, or between the microfibrils.

References (11)

  • T. Asano et al.

    Polymer

    (1978)
  • T. Yoshida et al.

    Polymer

    (1983)
  • A. Turner-Jones et al.

    Makromol. Chem.

    (1964)
  • T. Asano et al.

    Polym. J.

    (1979)
  • G. Shi et al.

    Makromol. Chem.

    (1989)
There are more references available in the full text version of this article.

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