THE PROGRESS OF FULL-RECIPROCAL-SPACE X-RAY SCATTERING ANALYSIS IN STUDYING THE ORITENTED POLYMERS. Jia-Cong, Hu*, Department of Macromolecular Science, Fudan University, Shanghai, China 200433

Full-Reciprocal-Space X-Ray Scattering Analysis (FRS-XRSA), suggested by the author, is a new theoretical analysis, which can be used to investigate and characterize the crystallinity and orientation texture of various oriented polymers. FRS-XRSA is preferable to the traditional Power Method(PM), Pole Figure Method (PF), Azimuthal Angle Scanning Method (AAS) and Orientation Distribution Function Analysis (ODFA) to investigate the preferred orientation polymers, the reason had been discussed in my original papers. In the present work, the main progress is how to apply FRS-XRSA in studying the oriented fiber, oriented film and strained polymers. For example, the crystallinity and orientation texture of uniaxially oriented hard elastic iso-poly (- propylene) fiber (HEPP) and biaxially stretched poly (- ethylene terephthalate) film(PET) were measured by FRS-XRSA procedure. The results show that the crystallinities, not only of the original samples but also of the on-line stretching samples, obtained by FRS-XRSA are more reasonable than that by PM, and all of the orientation textures and average orientations of a set of (hkl) planes, for HDEPP e.g. (040), (110), (130) and (111) planes; for PET e.g. (011), (110), (021) (010), (100), (113), (101), (121) and (105) planes, and various crystal axes, e. g. a, b and c, can be obtained by FRS-XRSA easily. The distribution of cristallite size in FRS can also be gained uniquely by this procedure. Because the crystal systems of i-PP and PET belong to the most complex two systems, i. e. monoclinic and triclinic systems respectively, now we deal with them successfully, so the other systems in crystalline polymers would be handled more easily. We think that FRS XRSA can be an alternative new procedure to study the crystallinity and orientation texture of various oriented polymers simultaneously and effectively.