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Title Process induced skin-core morphology in injection molded polyamide 66
Date 28.04.2020
Number 58129
Abstract 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 a-crystals while the perfection of a-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.
URL https://doi.org/10.3390/POLYM12040894
Publisher Polymers
Identifier
Citation Polymers 12 (2020) 894
DOI https://doi.org/10.3390/POLYM12040894
Authors Spörer, Y. ; Androsch, R. ; Jehnichen, D. ; Kühnert, I.
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