Experimental and numerical investigation of flow and alignment behavior of waste tire-derived graphene nanoplatelets in PA66 matrix during melt-mixing and injection

Dericiler, Kuray and Sadeghi, Hadi Mohammadjafari and Şaş Çaycı, Hatice Sinem and Saner Okan, Burcu (2021) Experimental and numerical investigation of flow and alignment behavior of waste tire-derived graphene nanoplatelets in PA66 matrix during melt-mixing and injection. Polymers, 13 (6). ISSN 2073-4360 (Online)

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Abstract

Homogeneous dispersion of graphene into thermoplastic polymer matrices during melt-mixing is still challenging due to its agglomeration and weak interfacial interactions with the selected polymer matrix. In this study, an ideal dispersion of graphene within the PA66 matrix was achieved under high shear rates by thermokinetic mixing. The flow direction of graphene was monitored by the developed numerical methodology with a combination of its rheological behaviors. Graphene nanoplatelets (GNP) produced from waste-tire by upcycling and recycling techniques having high oxygen surface functional groups were used to increase the compatibility with PA66 chains. This study revealed that GNP addition increased the crystallization temperature of nanocomposites since it acted as both a nucleating and reinforcing agent. Tensile strength and modulus of PA66 nanocomposites were improved at 30% and 42%, respectively, by the addition of 0.3 wt% GNP. Flexural strength and modulus were reached at 20% and 43%, respectively. In addition, the flow model, which simulates the injection molding process of PA66 resin with different GNP loadings considering the rheological behavior and alignment characteristics of GNP, served as a tool to describe the mechanical performance of these developed GNP based nanocomposites.
Item Type: Article
Uncontrolled Keywords: graphene, waste materials, upcycling, polymer nanocomposites, modeling, simulation
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA630-695 Structural engineering (General)
T Technology > T Technology (General) > T174.7 Nanotechnology
T Technology > TP Chemical technology > TP1080 Polymers and polymer manufacture
Divisions: Integrated Manufacturing Technologies Research and Application Center
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Depositing User: Burcu Saner Okan
Date Deposited: 21 Aug 2021 16:43
Last Modified: 31 Dec 2021 00:01
URI: https://research.sabanciuniv.edu/id/eprint/42021

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