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Mechanical Properties of Thermoplastic and Thermoset Composites Reinforced with 3D Biaxial Warp-knitted Fabrics

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Abstract

In this study, two types of thermoplastic matrices (low melting point polyethylene terephthalate (LPET) fiber and polypropylene (PP) fiber) and glass fiber/epoxy resin/multi-walled carbon nanotubes (MWCNTs) were used to fabricate the thermoplastic and thermoset composite materials with 3D biaxial warp-knitted fabrics. Thermoplastic and thermoset composites were fabricated using hot-press and resin transfer molding (RTM) methods. The fabricated samples were tested with tensile and three-point flexural tests. In thermoplastic composites, samples in the 90° direction and LPET matrix showed the best tensile and flexural properties with an improvement of 39 and 21% tensile modulus and strength, 16 and 8% flexural modulus and strength compared to the PP samples in the same direction. In thermoset composites, samples in the 90° direction and MWCNTs showed the best improvement of the flexural modulus and strength with 97 and 58% compared to the samples without MWCNTs. This improvement can most likely be attributed to an increase in interfacial adhesion due to the presence of the carbon nanotubes.

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Acknowledgments

The authors wish to acknowledge the Research fund of OMU (Project Numbers: (PYO.MUH.1904.16.004, PYO.MUH.1904.16.005, PYO.MUH.1901.16.001) for funding this study.

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Correspondence to Özgür Demircan.

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Al-darkazali, A., Çolak, P., Kadıoğlu, K. et al. Mechanical Properties of Thermoplastic and Thermoset Composites Reinforced with 3D Biaxial Warp-knitted Fabrics. Appl Compos Mater 25, 939–951 (2018). https://doi.org/10.1007/s10443-018-9725-x

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  • DOI: https://doi.org/10.1007/s10443-018-9725-x

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