アイソタクチックポリプロピンンの延伸による結晶および非晶鎖セグメントの配向と弾性率の異方性について

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  • 高原 弘和
    京都大学工学部高分子化学教室 ブリジストンタイヤKK中央研究所
  • 河合 弘迪
    京都大学工学部高分子化学教室
  • 福島 昭夫
    大日本セロハン株式会社 鐘淵工業KK
  • 山口 豊
    大日本セロハン株式会社 日立化成工業KK

書誌事項

タイトル別名
  • STUDIES ON THE RELATIONSHIP BETWEEN ORIENTATION OF CRYSTALLINE AND NON-CRYSTALLINE PHASES AND MECHANICAL ANISOTROPY OF ISOTACTIC POLYPROPYLENE
  • アイソタクチックポリプロピレン ノ エンシン ニ ヨル ケッショウ オヨビ ヒショウ サ セグメント ノ ハイコウ ト ダンセイリツ ノ イホウセイ ニ ツイテ

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抄録

Relationship between calculated and measured tensile moduli of uni- and biaxially oriented isotactic polypropylene specimens is investigated. The calculation of elastic modulus of bulk specimens is carried out on the basis of either the homogeneous stress or the homogeneous strain hypothesis using the uni- and biaxial orientation distribution of structural unit and their mechanical constants.<br>The calculated tensile modulus of both machine and transverse directions based on the homogeneous strain hypothesis are too high, while those based on the homogeneous stress hypothesis are rather close to the experimental results. For highly stretched specimen, morphology of the specimen from spherulite to highly oriented fiber texture, the calculated tensile modulus of transverse direction based on homogeneous strain hypothesis, however, is close to the experimental result.<br>The above calculation may be valid only for the glassy state of semi-crystalline polymers and other treatment based on the kinetic theory of polymer chains for non-crystalline phase may be necessary for rubbery state of the semi-crystalline polymers. The ratio of and are nearly 3 for the glassy state.

収録刊行物

  • 繊維学会誌

    繊維学会誌 27 (8), 349-358, 1971

    社団法人 繊維学会

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