Process Induced Skin-Core Morphology in Injection Molded Polyamide 66
| Autor: | Ines Kuehnert, Dieter Jehnichen, René Androsch, Yvonne Spoerer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Morphology (linguistics)
Materials science Polymers and Plastics crystallization Small-angle X-ray scattering Scattering injection molding Core (manufacturing) General Chemistry Molding (process) X-ray scattering Article law.invention lcsh:QD241-441 Optical microscope lcsh:Organic chemistry law Transmission electron microscopy Polyamide transmission electron microscopy Composite material polarized-light optical microscopy |
| Zdroj: | Polymers Volume 12 Issue 4 Polymers, Vol 12, Iss 894, p 894 (2020) |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym12040894 |
| Popis: | 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 µ m, 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 &alpha crystals while the perfection of &alpha 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. |
| Databáze: | OpenAIRE |
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