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Research Article

Influence of multi-walled carbon nanotubes on tensile and flexural properties of polyamide 66/short glass fiber composites

Özgür Demircan1,2, Fatma Burcu Uzunoğlu2, Naser Rezaei Ansaroudi1

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

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



Composite material;


Polymer Nanocomposite;

Polyamide 66;

Glass fiber;

Carbon nanotube;

Plastic injection moulding

In this study, influence of multi-walled carbon nanotubes (MWCNTs) on tensile and flexural behaviour of 15% short glass fiber (SGF) reinforced Polyamide 66 (PA 66/15SGF) and 30% short glass fiber reinforced Polyamide 66 (PA 66/30SGF) is investigated. Test specimens composed of neat PA 66, PA 66/15SGF, PA 66/30SGF and PA 66/30SGF/MWCNTs are produced using plastic injection moulding machine; and their tensile and flexural properties are characterized. The effects of MWCNTs contents on the micro-structure and morphology of the composites were investigated by using a scanning electron microscope (SEM), fourier transform infrared spectroscopy analysis (FTIR) and optical microscopy (OM). Mechanical analyses reveal that neat PA 66 exhibits the lowest elastic modulus, 2.11 GPa, and tensile strength, 60.61 MPa, while the highest tensile modulus, 4.69 GPa, and strength, 87.05 MPa, are exhibited by PA 66/30SGF/MWCNT and PA 66/30SGF, respectively. In other words, with the addition of MWCNT, tensile strength of PA 66/30SGF decreases by 13.4 % whereas the elastic modulus increases by nearly 4.7 %. In addition, flexural test results shows that the integration of MWCNTs improves the flexural strength and flexural modulus of PA 66/30SGF by 1% and 12%, respectively.

© 2022 MIM Research Group. All rights reserved.


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.

21/10/2023 Journal Submission System Upgrade Completed: We're delighted to announce that our Journal Submission and Tracking System has undergone a significant upgrade, aimed at enhancing your experience. We apologize for the delay, and any inconvenience it may have caused. Here are the key enhancements from a user perspective:

Improvements are designed to make your interaction with our journal smoother and more efficient. Please take the upgraded system for a spin and share your thoughts with us. If you encounter any issues or have questions, please don't hesitate to reach out to our support team.

27/12/2022 Reviewer AwardsThe winners of 2022 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section. 

(More details of the news may be given in the News section)

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2022 Reviewer Awards:

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

2022 Best Paper Award:

The paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 

2022 Most Cited Paper Award:

The paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the


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