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Research Article

Tensile and charpy impact properties of CNTs integrated PET/ Glass Fiber thermoplastic composites with commingled yarn

Özgür Demircan1,2, Sarah Sufyan2, Ahmed Mohamed Basem2

1Department of Metallurgical and Material Engineering, Ondokuz Mayıs University, Samsun, Turkey   

2Department of Nanoscience and Nanotechnology, Ondokuz Mayıs University, Samsun, Turkey



Carbon nanotubes (CNTs);

Non-crimp fabric (NCF);

Glass fibre (GF);

Polyethylene terephthalate (PET);

Composite materials;


Charpy impact properties

Within this study, the non-crimp fabrics (NCF) with commingled yarns that they contained hybrid structures in which two different materials in the form of fibers were mixed, which consisted of polyethylene terephthalate (PET)/glass fiber (GF), were coated with multi-walled carbon nanotubes (MWCNTs) (weight percentages were 0 and 0.9%) and modified multi-walled carbon nanotubes (MWCNTs-Carboxylic acid (COOH)) (weight percentages were 0 and 0.9%) to fabricate hybrid composites. Three types of composite materials were prepared (pure polyethylene terephthalate/glass fiber (PET/GF), PET/GF with MWCNTs and PET/GF with MWCNTs-COOH) and they were tested against tensile and Charpy impact loadings. The effects of MWCNTs contents on the micro-structure and morphology of the composites were reported by using a scanning electron microscope (SEM), fourier transform infrared spectroscopy analysis (FTIR) and optical microscopy (OM). The specimens with MWCNTs-COOH exhibited an enhancement of 33% tensile strength, 23% tensile modulus and 8% Charpy impact energy compared to the samples without MWCNTs-COOH. It can be concluded that even a small mass fraction of MWCNTs was capable of improving the mechanical performance of the glass fiber reinforced PET matrix composites. In other words, due to the presence of the carbon nanotubes on the fiber surface helped to improve interfacial adhesion in the fabricated composites.

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01/01/2024 Best Paper Award: The winners of 2023 Best Paper Award of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Author Awards section.

01/01/2024 Most Cited Paper Award: The winners of 2023 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Author Awards section.

01/01/2024 Reviewer Awards: The winners of 2023 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section.

8/12/2023 Special Issue: Embark on a journey of innovation with the journal of Research on Engineering Structures and Materials as we unveil a compelling opportunity for contributors in our upcoming special issue, "Design, Analysis, and Manufacturing of Composite Vehicle Structures." Led by distinguished Guest Editors Liubov Gavva and Oleg Mitrofanov from Moscow Aviation Institute. For more info see the link.

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2023 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.

2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.

2023 Most Cited Paper Award:

The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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