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ECAP Process in Polypropylene

Bibliographic Information

Other Title
  • ポリプロピレンのECAP加工
  • ポリプロピレン ノ ECAP カコウ

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Abstract

Equal channel angular pressing (ECAP) invented by Segal was applied successfully to metal process of aluminum and magnesium alloys for increasing their strength by fining the grain size. But a little attention has been paid to its application to polymers. In this paper, ECAP process of crystalline polymer, polypropylene (PP), was studied using optical microscope, differential scanning calorimetry (DSC), specific gravity measuring system and small tensile testing machine. It was shown that 1. ECAP was effective at a temperature slightly lower than the crystallization temperature and at a low pressing speed, 2. the shear deformation was very intense at the interior of the specimen, while the surfaces was not sheared and 3. the yield stress of PP along the extrusion direction increased with anincrease in the repeated numbers of ECAP process.

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Details

  • CRID
    1390001205417915008
  • NII Article ID
    110006570821
  • NII Book ID
    AN00096175
  • DOI
    10.2472/jsms.55.37
  • ISSN
    18807488
    05145163
  • NDL BIB ID
    7800779
  • Text Lang
    ja
  • Data Source
    • JaLC
    • NDL
    • Crossref
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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