Molecular Aggregation Structure of Notched Nylon 12 Film during Uniaxial Elongation

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  • TAKAYAMA Nobuhisa
    Graduate School of Engineering, Kyushu University
  • TAKADA Akihiko
    Institute for Materials Chemistry and Engineering, Kyushu University
  • KOJIO Ken
    Graduate School of Engineering, Kyushu University Institute for Materials Chemistry and Engineering, Kyushu University WPI-I2CNER, Kyushu University
  • TAKAHARA Atsushi
    Graduate School of Engineering, Kyushu University Institute for Materials Chemistry and Engineering, Kyushu University WPI-I2CNER, Kyushu University

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Other Title
  • ノッチを導入したナイロン12フィルムの一軸伸長過程における分子凝集構造評価
  • ノッチ オ ドウニュウ シタ ナイロン 12 フィルム ノ イチジク シンチョウ カテイ ニ オケル ブンシ ギョウシュウ コウゾウ ヒョウカ

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Abstract

<p>Polarizing observation was carried out for nylon 12 (Ny12) films with a notch of ca. 0.2 mm length during uniaxial elongation. As the result, a ductile deformation behavior was detected, and a X-shaped area with higher retardation was observed around the notch extending to 45˚inclined direction to the uniaxial elongation direction. Moreover, during the uniaxial elongation, in-situ wide angled X-ray diffraction (WAXD) measurement were performed at various positions in the Ny12 film specimens. As a result, a crystal phase transition from γ-crystal to α-crystal seemed to occur in the region where higher retardations were observed. Since the intrinsic birefringence in α-crystal is higher than those in γ-crystal and amorphous phases, the increase in retardation can be caused by increase of α-crystalline fraction.</p>

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 94 (9), 293-298, 2021

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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