Effect of the Graphene Nanoplatelets (GnPs) on the Mechanical Properties in Recycled PP-Based Hybrid Composites

Cem Okan, Ramazan Kaya, Alaeddin Burak Irez*, Emrullah Cebe

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In the day we fight against Covid-19, the use of disposable masks and isolation clothing is multiplied by 12 compared to the time before the Covid-19 pandemic. Considering that these disposable masks are made of polypropylene (PP), an average of 480 kilotons of PP waste is produced each year, exclusively from masks. After the use of these masks, it is important to collect and re-evaluate them in a controlled manner so as not to pose a risk of contamination and not to threaten the environment. Because of its advantageous properties, PP is used in the production of many parts in the automotive industry. With this study, it is aimed to develop composite materials to be used in car bumper manufacturing by using recycled PP obtained from melt blown PP fabrics (surgical mask fabric). Due to accidents or road conditions, impact damage can occur on the bumpers. Therefore, the impact resistance of the bumpers must be improved. In addition, in case of microscale damage resulting from the impacts received, microcracks may develop and cause material failure below the maximum tensile stress. In summary, effective reinforcements should be used to improve impact strength in composites for use in car bumpers. Accordingly, novel recycled PP (rPP) based composites are manufactured by using elastomer-styrene-ethylene-butylene-styrene (SEBS) and graphene nanoplatelets (GnPs) as compatible reinforcements with rPP. As experimental characterization, three-point bending tests and Charpy impact tests were carried out. Incorporation of GnPs increased the flexural strength and blending with SEBS improved the impact resistance of the developed composites. Certain clusters of the graphene nanoplatelets were observed by means of microscopy.

Original languageEnglish
Title of host publicationMechanics of Composite, Hybrid and Multifunctional Materials, Fracture, Fatigue, Failure and Damage Evolution - Proceedings of the 2021 Annual Conference on Experimental and Applied Mechanics
EditorsVijay Chalivendra, Allison M Beese, Ryan B. Berke
Number of pages6
ISBN (Print)9783030867409
Publication statusPublished - 2022
EventSEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2021 - Virtual, Online
Duration: 14 Jun 202117 Jun 2021

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652


ConferenceSEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2021
CityVirtual, Online

Bibliographical note

Publisher Copyright:
© 2022, The Society for Experimental Mechanics.


Acknowledgements This research was supported by the Istanbul Technical University Office of Scientific Research Projects (ITU BAPSIS), under grant MAB-2021-42811. The authors thank Elastron TR and Ersem Plastik for their material support and valuable discussions during this project.

FundersFunder number
Istanbul Teknik ÜniversitesiMAB-2021-42811


    • Eco-composites
    • Graphene nanoplatelets
    • Impact resistance
    • Recycled polypropylene


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