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Moisture Adsorption and Desorption Behavior of Raw Materials for the T-RTM Process

 
: Herzog, Janek; Wendel, Rainer; Weidler, Peter, G.; Wilhelm, Michael; Rosenberg, Philipp; Henning, Frank

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Volltext urn:nbn:de:0011-n-6213868 (2.0 MByte PDF)
MD5 Fingerprint: 365599e5b222e36478c1f22d5a3ed48f
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Erstellt am: 19.1.2021


Journal of composites science 5 (2021), Nr.1, Art. 12, 9 S.
ISSN: 2504-477X
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ICT ()
T-RTM; moisture; composite; carbon fiber; glass fiber; anionic polyamide 6 (aPA6); anionic polymerization; cast polyamide 6 (cast PA6); ε-caprolactam; hermoplastic composites

Abstract
The use of fiber reinforced plastics (FRPs) has significant potential to reduce the weight of components. As regards the sustainability of these components, thermoplastic matrices offer more potential for recycling than thermoset ones. A possible manufacturing process for the production of thermoplastic FRPs is thermoplastic resin transfer molding (T-RTM). In this very moisture-sensitive process, ε-caprolactam in addition to an activator and catalyst polymerizes anionically to polyamide 6 (aPA6). The anionic polymerization of aPA6 is slowed down or even completely blocked by the presence of water. This study analyses the sorption behavior of the matrix, fiber, binder and core materials for the production of anionic polyamide 6 composites, which are processed in the thermoplastic RTM process. Water vapor sorption measurements are used to determine the adsorption and desorption behavior of the materials. The maximum moisture loading of the materials provides information about the water adsorption capacity of the material. This knowledge is crucial for correct handling of the materials to achieve a fast process and good properties of the final product.

: http://publica.fraunhofer.de/dokumente/N-621386.html