Injection Molding and Morphology
Transcript of Injection Molding and Morphology
Leibniz-Institutfür PolymerforschungDresden
LeibnizGemeinschaft
Injection Molding and Morphology
Thermal and microscopic investigation methods are of essential importance to determine the process-structure-property relationships of the raw materials and the injection molded components. At the Leibniz-Institut fuer Polymerforschung Dresden e.V. they are used for the investigation of crystallization processes, process-induced morphology, interface effects, phase morphology and micromechanical failure behavior. The further development of preparation methods and investigation methods (correlative methods) are challenges that need to be addressed.
Crystallization Processes
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Crystallization Colling rate 10 K/min
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50 µm
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Crystallization curves of different semi-crystalline thermoplastics [1]. Method: Differential Scanning Calorimetry (DSC).
Isothermal spherulite growth of polylactide (PLA) [2].Method: Thermal stage experiment on a light microscope with polarized light.
-90 J/g
-88 J/g
-58 J/g
-182 J/g
-103 J/g
-213 J/g
10 J/gK
PA66PA6PBTPOMPPPEHD
Photo © Döring
Process-Induced Morphology
Literature
1 Kuehnert, I., Schoenfeldt, A., Auf der Landwehr, M., New Insights into interfaces in injection molded parts, Proceedings ANTEC, Cincinnati, USA (2013)
2 Kuehnert, I., Berger, M., Zimmermann, M. Weld Line Behavior in Injection Molded Parts, Proceedings PPS31, Jeju Island, Korea (2015)
3 Spoerer, Y., Blanco, C., Zimmermann, M., Kuehnert, I, Morphology-property behavior of semi crystalline polymers in injection molded parts. AIP Conference Proceedings 2055 (2019)
4 Fischer, M., Ausias, G., Kuehnert, I. Investigation of interfacial behavior on injection molded parts. AIP Conference Proceedings 1713 (2016)
Injection molded polyamide interface under a polarized light microscope.Left: skin area (standard injection molding), center: weld line, V-notch at the skin [3], right: cold interface (multi-component injection molding)
Correlative Microscopy of the morphology of polyvinylidene fluoride (PVDF) - Polymethylmethacrylate (PMMA).Left: Polarized Light Microscopy, right: Scanning Electron Microscopy with element distribution of fluorine (red) and oxygen (blue).
Failure Behavior
Left: Thin-section tensile device in a polarized light microscope, center: PP / PP interface in tensile test, Scanning Electron Microscopy (SEM) [4] and necking in a tensile test on a thin section, Light Microscopy.
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Phase Morphology
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Contact
Leibniz-Institut für Polymerforschung Dresden e. V.Department Processing TechnologyDr.-Ing. Ines KühnertE-Mail: [email protected] +49 (0)351 4658 368F +49 (0)351 4658 290
Hohe Straße 6 . 01069 Dresden . Germanywww.ipfdd.de