溶融成形した全芳香族熱可塑性ポリイミド膜の熱的挙動と高次構造

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タイトル別名
  • Thermal Behavior and Supermolecular Structure of Wholly Aromatic Thermoplastic Polyimide Films Moulded from the Melt.
  • ヨウユウ セイケイシタ ゼン ホウコウゾク ネツ カソセイ ポリイミド マク

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Thermal behavior and supermolecular structure of wholly aromatic thermoplastic polyimide [poly (3, 3′-dioxyphenyl) diphenylpyromellitimide (TPI) ] was studied using DSC, and wide-angle and small-angle X-ray diffractometry (WAXD and SAXD). A new system utilizing one-dimensional PSPCwas applied for measuring the contour map of SAXD intensity distribution (SAXD diagrams). On the basis of long period, crystallinity, lower melting temperature, and heat of fusion, equilibrium melting temperature and free energy of the surface normal to the chain direction of TPI crystal have been evaluated to be 487°C and 165erg/cmcm2, respectively. A series of SAXD diagrams of TPI films with different draw ratio (λ=1.0-3.5) were obtained to elucidate the effect of hot drawing and heat-treatment on the supermolecular structure of TPI films. With increasing draw ratio up to λ=2.0, lamellar crystals reorient with their surface normal inclining to the drawing direction. A two-point pattern appeared in the SAXD diagrams of 2.5-3.0 times drawn TPI films. After this stage of drawing, it was considered that the two-point SAXD pattern was degenerated into a four-point pattern.

収録刊行物

  • 高分子論文集

    高分子論文集 51 (5), 329-336, 1994

    公益社団法人 高分子学会

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