Effect of graphene nanoplatelets structure on the properties of acrylonitrile–butadiene–styrene composites

Abstract

In this study, the effects of various types of commercial graphene nanoplatelets (XG Sciences xGnP M5, C300, C500, and C750) on the thermal, electromagnetic shielding (EMI SE), electrical and mechanical behavior of an acrylonitrile-butadiene-styrene (ABS) copolymer matrix were investigated. The selected nanofillers were characterized and compared in term of surface area, different oxygen content, dimension and density (X-ray photoelectron spectroscopy, scanning electron microscopy, and helium pycnometry). Graphene nanoplatelets were dispersed in ABS by direct melt compounding at 2, 4, and 8 wt%. Melt flow index (MFI) values almost linearly decreased with all the type of xGnPs, especially with the highest surface area nanofiller (C750). Moreover, EMI SE of neat ABS was improved from 20.7 dB to 22.5 dB (increase more than 3 times) for xGnP (C300, C500, and C750) and to 26.2 dB (increase about 9 times) for xGnP-M5, in agreement with proportional reduction of electrical resistivity. xGnP-M5 also resulted in being most effective in enhancing the tensile modulus which improved up to 64%, while a maximum increment of about 20% was obtained with the others xGnP nanoparticles. However, yield stress slightly decreased for xGnP-M5 (about 29%) and remained fairly constant for others nanofillers. Halpin-Tsai model used to predict the tensile modulus of the nanocomposites suggested that graphene nanoplatelets were randomly oriented in the ABS matrix in a three-dimensional (3D) manner. POLYM. COMPOS.,

Effects of the Nanofillers on Physical Properties of Acrylonitrile-Butadiene-Styrene Nanocomposites: Comparison of Graphene Nanoplatelets and Multiwall Carbon Nanotubes

“…To compare the mechanical properties of ABS composites reported in literature, a normalized modulus was evaluated as follows: where E c is the modulus of ABS composite; E m is the matrix modulus of neat ABS and w f is the weight fraction of incorporated filler [ 6 , 31 ].…”

“…During recent decades, polymer nanocomposites with carbon-based nanofillers have been extensively investigated for fabrication of multifunctional materials with tailored properties, including high mechanical, thermal and electrical performance. Among these nanofillers, different form of graphene and carbon nanotubes have been commonly utilized due to their extraordinary intrinsic properties [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. The nomenclature of two-dimensional carbon materials is still an object of discussion and confusion, for instance between graphene nanoplatelets or graphite nanoplates.…”

“…Our previous research has been focused on the structure and physical properties of different types of ABS-carbon based nanocomposites. Large lateral size of graphene nanoplatelets in the ABS containing a lubricant provided better mechanical and electromagnetic shielding properties [ 6 ]. Two different types of ABS (with and without lubricant additive) GNP filled nanocomposites were compared.…”

Poly(methyl methacrylate)‐Assisted Exfoliation of Graphite and Its Use in Acrylonitrile‐Butadiene‐Styrene Composites

“…Two FoM are evaluated, that is, the Young's modulus, defined as the slope of the stress versus the strain curve in the elastic region, and the tensile strength, defined as the highest value of stress reached during the testing . In the literature, FLG and graphene nanoplatelets (GnPs) are used as fillers to improve the mechanical properties of ABS. Waheed et al .…”

“…The ABS composites containing 8 wt. % GnPs in the studies of Du et al . also present a drop in the tensile strength, that is, 10 %, compared to the pristine ABS, associated to the poor adhesion between the matrix and the filler.…”