双轴取向PET薄膜结晶、织构与超结构的研究

STUDIES ON THE CRYSTALLINITY, TEXTURE AND SUPERS-TRUCTURE OF BIAXIALLY ORIENTED PET FILMS

二类市售12μPET薄膜,即平衡膜与强力膜,应用作者提出的FRS-XRSA与传统的PF以及SAXS进行了比较全面的结构研究。从而获得了有关这些薄膜的结晶、织构与超结构的重要信息与参数,例如:结晶度、晶粒度、(Akl)晶面取向分布全貌与平均取向因子、长周期、晶区尺度、非晶区尺度及电子密度经向分布函数等。这些结构的信息既记录了加工的工艺过程,又对薄膜的各种重要物性,如力学、光学、热学、化学和表面等性质起着决定性的作用。这二类薄膜均可归属于(MT,100)共面、c-晶轴M、T双轴取向的平衡膜或非平衡膜。最后应指出,X-射线法是研究择优取向聚合物结晶、织构与超结构的极为重要的手段。

Two kinds of commercial 12 μ PET filma, e.g. equilibrium-film and tensile-film, were investigated by FRS-XRSA suggested by suthor, Pole-Figure method and SAXS. Many important informations and parameters of the crystallinity, texture and superstructure of the films are obtained, for example, crystailrnity, crystailite size, orientation distribution, orientation factors, long periodicity, crystal-region dimension, amorohous-region dimension and electron-de-nity radial distribution function etc. These structural informations not only are the records of manifacture processes, but also have important meaning for understanding various properties of the films, e.g. mechanical, optical, thermical and surface properties etc. These two kinds of PET films belong to (MT, 100) uniplanar, c-exis M. T. biaxially orfented equilibrium film or nin-equilibrium film.