延伸高分子フィルム再延伸時の変形機構解析第2報 特性曲線を用いた変形と塑性滑りモデルによる分子鎖軸の再配向挙動の解析
Analysis of Deformation Mechanism with Re-stretching of Stretched Polymer Film Part II : Analyses of Deformation Band with Characteristic Curve and Re-orientation Behavior of Molecular Chain Axis with the Model of Plastic Slippage
劉 源・日比貞雄・坂本雄二・中西英二・高橋清久
Liu, Yuan / Hibi, Sadao / Sakamoto, Yuji / Nakanishi, Eiji / Takahashi, Kiyohisa
The characteristic curve and deformation band with yield points were investigated in off-axis angle stretching of strip-biaxially stretched poly (ethylene terephthalate) (PET) and isotactic polypropylene (it-PP) films. As the yield strain in polymers are much greater than those of metals, the change of orientation angles must be corrected for elastic-plastic deformation. The re-orientation mechanisms of chain axes during off-axis angle stretching may be divided into inter-lamella slippage and intra-lamella chain slip. The orientation of molecular chain axes by chain slip was much greater than that of inter-lamella slip.
Key words: Characteristic curve / Inter-lamella / Chain slip / Poly (ethylene terephthalate) film / Isotactic polypropylene film