Abstract
Abstract Single polymer laminate composites based on polyamide 6 (PA6) were prepared by two methods: (i) reactive injection molding and (ii) powder coating/compression molding, both carried out in the presence of PA6 woven textile plies. The effect of the textile volume fraction Vf on the tensile properties of all composites was investigated. The laminates obtained by powder coating/compression molding displayed best mechanical performance, whereby in the composites with Vf = 15%, the improvement of the elastic modulus reached 98% in respect to commercial hydrolytic PA6 reference, or 50–86% as compared to neat anionic PA6 samples. Polarizing light microscopy with image processing was used for morphological characterization. A transcrystalline layer at the fiber-matrix interface was detected in all laminates with thicknesses between 0.5 and 3.0 μm, depending on the preparation technique applied. The thermal stability was studied in the temperature range of 30°C-550 °C. The laminates obtained by reactive injection molding displayed the lowest initial decomposition temperature due to the presence of oligomers. Selected laminate composites were reprocessed by grinding and injection molding. The recycled composites obtained by powder coating displayed a 38% increase of the elastic modulus in respect to commercial hydrolytic PA6 thus confirming the sustainability and recyclability of PA6-based single polymer composites.
Highlights
Conventional thermoplastic composites (TPC) are produced by combining chemically different matrix and reinforcement components
These findings have stimulated the interest toward new developments related to single polymer composites (SPC) materials based on commercial thermoplastic, including polyamides
Polyamide 6 (PA6)-based SPC are typically prepared by melt-processing techniques that may include powder impregnation [11], hot compaction [12,13], overheating of fibers [14], film-stacking [15], and co-extrusion [16]
Summary
Conventional thermoplastic composites (TPC) are produced by combining chemically different matrix and reinforcement components. Polyamide 6 (PA6)-based SPC are typically prepared by melt-processing techniques that may include powder impregnation [11], hot compaction [12,13], overheating of fibers [14], film-stacking [15], and co-extrusion [16] All these techniques require partial melting of prefabricated reinforcing polymeric elements in order to create the isotropic matrix, whereby often the processing window does not exceed 5 °C. The PCCM process produced SPC laminated with good mechanical properties in tension, reaching relative improvements of the elastic modulus of 12% and 86% as compared to the neat PA6 matrix component and KSPC prepared by NYRIM technique. The thermal stability of produced and recycled composites was studied in the 30-550 °C range
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
