Morphological study by TEM on uniaxially oriented thin films of PET, PEN and their blends
- 作者：Yoshioka ; Taiyo ; Tsuji ; Masaki ; Kawahara ; Yutaka ; Kohjiya ; Shinzo
- 关键词：Fiber morphology ; Transmission electron microscopy ; Dark-field image
- 刊名：Polymer
- 出版年：2003
- 期刊代码：83_00323861
- 类别：ms
- 出版时间：December, 2003
- 卷：44
- 期：26
- 页码：7997-8003
- 文件大小：2.19 M
摘要
Uniaxially oriented thin films of poly(ethylene terephthalate) (PET), poly(ethylene 2,6-naphthalene dicarboxylate) (PEN) and their blends were prepared by applying shear strain to their respective melts, and the resulting morphologies were studied by transmission electron microscopy. Selected-area electron diffraction of each film revealed well-defined uniaxial orientation of polymer chains in the shearing direction. In the uniaxially oriented thin film of PEN, stacked-lamellar structure with the average long period of 27 nm consisting of a crystalline region about 15 nm thick and an amorphous one about 12 nm thick was found here and there in the dark-field image: PEN-type. On the other hand, stacked-lamellar structure was rarely observed in the case of PET: PET-type. In PET/PEN blends, the morphologies changed from the PET-type to the PEN-type with increasing content of PEN.