Spoerer Yvonne, Androsch René, Jehnichen Dieter, Kuehnert Ines
Institute of Polymer Materials, Department of Processing, Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, 01069 Dresden, Germany.
Interdisciplinary Center for Transfer-Oriented Research in Natural Sciences, Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany.
Polymers (Basel). 2020 Apr 12;12(4):894. doi: 10.3390/polym12040894.
Polyamide 66 (PA 66) was injection-molded to obtain samples with a structure gradient between skin and core, as it was revealed by analysis of the semi-crystalline morphology using polarized-light optical microscopy (POM). Wide-angle X-ray scattering (WAXS) and small-angle X-ray scattering (SAXS) were employed to characterize thin sections with a thickness in the order of magnitude of 50 µm, allowing detection of crystals of different perfection, as a function of the distance from the surface. It was found that the transparent and non-spherulitic skin layer contains rather imperfect α-crystals while the perfection of α-crystals continuously increases with extending distance from the surface. Since variation of the molding conditions allows tailoring the skin-core morphology, the present study was performed to suggest a reliable route to map the presence of specific semi-crystalline morphologies in such samples.
聚酰胺66（PA 66）通过注塑成型获得具有皮层和芯层结构梯度的样品，这是通过偏光光学显微镜（POM）对半结晶形态的分析揭示的。采用广角X射线散射（WAXS）和小角X射线散射（SAXS）对厚度约为50 µm的薄片进行表征，从而能够检测不同完美程度的晶体，其是距离表面的函数。研究发现，透明且无球晶的皮层含有相当不完善的α晶体，而α晶体的完美程度随着距表面距离的增加而不断提高。由于成型条件的变化允许调整皮层-芯层形态，因此进行本研究以提出一种可靠的方法来绘制此类样品中特定半结晶形态的分布图。
