Effects of chemical structure and morphology of graphene-related materials (GRMs) on melt processing and properties of GRM/polyamide-6 nanocomposites

Gomez, Julio, Villaro, Elvira, Karagiannidis, Panagiotis and Elmarakbi, Ahmed (2020) Effects of chemical structure and morphology of graphene-related materials (GRMs) on melt processing and properties of GRM/polyamide-6 nanocomposites. Results in Materials, 7. p. 100105. ISSN 2590-048X

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Abstract

In this work, different graphene-related materials (GRMs) and polyamide-6 (PA6) were melt compounded by twin screw extrusion. The GRMs prepared were graphene nanoplatelets (GNPs), graphene oxide (GO), reduced graphene oxide (rGO) and silane functionalised reduced graphene oxide (f-rGO). The GRMs had comparable lateral size (20-30μm), but different thickness and surface chemistry which resulted in different behaviour in processing of melt flow, maximum loading in the PA6 matrix (15%wt for GNPs, 10%wt for GO, 2%wt for rGO and 2.5%wt for f-rGO) as well as mechanical properties. A second extrusion phase produced formulations with lower concentration of GRMs. In the case of f-rGO/PA6, the melt flow index increased by over 76% at 0.5%wt loading compared with the pure PA6 resin, facilitating processing and dispersion of the flakes within the matrix and increasing the elastic modulus and tensile strength by 39%. However, high filler content above 10% has been achieved only for GNPs improving the elastic modulus by 50% at 15%wt.

Item Type: Article
Divisions: Faculty of Technology > School of Engineering
Depositing User: Leah Maughan
Date Deposited: 26 May 2020 15:34
Last Modified: 17 Sep 2020 16:31
URI: http://sure.sunderland.ac.uk/id/eprint/12076
ORCID for Panagiotis Karagiannidis: ORCID iD orcid.org/0000-0002-2709-4161

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