Styrene-butadiene Nanocomposites Research Articles

Investigation of the structure-property relation for graphene oxide based acrylonitrile butadiene styrene nanocomposites

The improvement of the structure-property relation in nanocomposites between different polymer matrices and the embedded nano-additives has become a strategic blueprint for many academic counterparts around the globe. In this work, different loadings of graphene oxide (GO) varied from 1.0 to 3.0 wt. % were mixed with acrylonitrile butadiene styrene (ABS) using solution casting approach. The resulted nanocomposites underwent to spectral, structural, morphological, mechanical, thermal and thermomechanical tests. Different kinds of instruments associated with each test were employed to draw a professional conclusion about the potential improvement in structure-property relation. The targeted improvement was achieved as spectral, structural and morphological investigations confirmed the interaction, structural variation, and good dispersion of GO in ABS; respectively. Furthermore, as GO loadings went higher, the mechanical, thermal, and thermomechanical performances for the nanocomposites were improved compared to the neat polymer. Young’s modulus, tensile strength, thermal decomposition, and visco-elastic properties showed an enhancement compared to the neat polymer. The mechanical and thermomechanical performances for the nanocomposites recorded significant promotions.

Improved mechanical properties of multiwalled carbon nanotube reinforced acrylonitrile butadiene styrene nanocomposites prepared by twin screw extruder

Dispersion of carbon nanotubes in a thermoplastic polymer matrix is a big challenge in the research community. In the present study, multiwalled carbon nanotubes (MWCNTs) were dispersed in acrylonitrile butadiene styrene (ABS) polymer by a twin screw extruder to improve mechanical and thermal properties. The desired ratio of MWCNT in ABS (1, 2, and 3 wt.%) were dispersed through single and double extrusion processes by a twin screw extruder. The test specimens of produced composites and pure ABS materials were prepared by micro-injection molding. The nanocomposites’ mechanical and thermal properties were investigated and compared with pure ABS. It has been found that the tensile strength has increased significantly for single-extruded and double-extruded composites. A comparative study of MWCNTs reinforced ABS nanocomposites and pure ABS was carried out using thermogravimetric analysis, Fourier's transform infrared, X-ray diffraction, and Scanning electron microscopy. It was found that the microhardness has also increased for single- and double-extruded nanocomposites in comparison to pure ABS.

Rigid and conductive lightweight regenerated cellulose/carbon nanotubes/acrylonitrile–butadiene–styrene nanocomposites constructed via a Pickering emulsion process

AbstractLightweight polymer‐based conductive nanocomposites are attractive future electronic materials. However, the agglomeration of carbon nanotubes (CNTs) in the polymers is still a serious concern. Herein, CNTs were homogeneously dispersed in acrylonitrile–butadiene–styrene (ABS) matrix with the aid of regenerated cellulose (RC), via an easy and cost‐effective Pickering emulsion approach to form conductive nanocomposites. The prepared nanocomposites were investigated for their morphological, thermal, electrical, mechanical, and rheological properties. CNTs were observed to be uniformly entrapped within the RC suspension. RC proved to be both an efficient dispersant and stabilizer for CNTs and ABS, respectively, in that a noticeable enhancement in the electrical conductivity of the polymer of up to 21 Sm−1 was caused with the incorporation of 6.7 wt.% CNTs. RC alone caused 29.6% increase in the tensile strength of neat ABS, while the Young's modulus of the nanocomposites was increased by 21.1%. This improvement was attributed to the uniform dispersion of the stiff CNT/RC hybrid suspension and the formation of strong bond interactions in the ABS matrix. Furthermore, higher crystallinity and melt viscosity in the blends were achieved. This upturn in ABS properties will enable its wider application in the engineering industry as conductors, sensors, antistatic, and electromagnetic interference materials.

Structure and Properties of Multi-walled Carbon Nanotube/Acrylonitrile Butadiene Styrene Nanocomposite Specimens Prepared by Fused Deposition Modeling

Acrylonitrile butadiene styrene (ABS) nanocomposites reinforced with multi-walled carbon nanotubes (MWCNTs) were prepared by melt blending and then extruded in filaments for the fused deposition modeling (FDM) process. The structure and properties of the FDM printed specimens were investigated by scanning electron microscopy, Raman spectroscopy, tensile testing, and dynamic mechanical analysis. The results showed that MWCNTs were evenly dispersed in the styrene-acrylonitrile (SAN) phase of the ABS matrix and had strong interactions with the SAN, which resulted in improvements of the tensile strength and modulus of the printed specimens. The tensile strength and modulus of the specimen with 8 wt.% MWCNTs reached 52.1 and 2727.2 MPa, which was 29% and 40% higher than those of the ABS specimens, respectively. Furthermore, the addition of MWCNTs improved the storage modulus (E′), glass transition temperature (Tg) and the thermal stability properties of the ABS specimens.

Effect of carboxylic multi-walled carbon nanotubes on mechanical properties of Acrylonitrile Butadiene Styrene nanocomposite

Acrylonitrile Butadiene Styrene (ABS) nanocomposites were fabricated using carboxylic acid functionalized Multi-Walled Carbon Nanotubes (c-MWCNT) by solvent mixing method. Five different weight compositions of c-MWCNT in ABS were fabricated ranging from 1 to 10 wt% (1, 3, 5, 7.5, 10). The distribution of c-MWCNT in ABS/c-MWCNT nanocomposite was analyzed using Field Emission Scanning Electron Microscope (FESEM) technique. X-Ray diffraction (XRD) was performed on c-MWCNT for structural analysis and to confirm the presence of c-MWCNT. The ABS/c-MWCNT nanocomposites were the subjected to mechanical characterization in which the nanocomposites showed significant improvement in the compressive Young’s modulus in comparison to pure ABS, especially at lower weight percentage of c-MWCNT in ABS/c-MWCNT nanocomposites. The maximum improvement in Young’s modulus was shown by 5 wt% nanocomposite of 38% in comparison to pure ABS. Improvement in the mechanical property of ABS polymer by adding c-MWCNT will be highly beneficial for improving and widening the applicability of ABS.

Synergetic effect of graphene oxide-carbon nanotube on nanomechanical properties of acrylonitrile butadiene styrene nanocomposites

Herein, multiwall carbon nanotubes (MWCNTs), reduced graphene oxide (rGO), graphene oxide-carbon nanotubes (GCNTs) hybrid reinforced acrylonitrile butadiene styrene (ABS) nanocomposites have been prepared by micro twin screw extruder with back flow channel and the effect of different type of fillers on the nanomechanical properties are studied. The combination of both graphene oxide and CNT has enhanced the dispersion in polymer matrix and lower the probability of CNTs aggregation. GCNTs hybrid have been synthesized via novel chemical route and well characterized using Raman spectroscopic technique. The nanoindentation hardness and elastic modulus of GCNTs-ABS hybrid nanocomposites were improved from 211.3 MPa and 4.12 GPa of neat ABS to 298.9 MPa and 6.02 GPa, respectively at 5wt% GCNTs loading. In addition to hardness and elastic modulus, other mechanical properties i.e. plastic index parameter, elastic recovery, ratio of residual displacement after load removal and displacement at the maximum load and plastic deformation energy have also been investigated. These results were correlated with Raman and X-ray photoelectron spectroscopic (XPS) techniques and microstructural characterizations (scanning electron microscopy). Our demonstration would provide guidelines for the fabrication of hard and scratches nanocomposite materials for potential use in, automotive trim components and bumper bars, carrying cases and electronic industries and electromagnetic interference shielding.

Effects of Multi-Walled Carbon Nanotubes on the Properties of Acrylonitrile Butadiene Styrene Nanocomposites Potentially Used for Fused Deposition Modeling

Multi-walled carbon nanotubes (MWCNTs)/acrylonitrile butadiene styrene (ABS) nanocomposites were prepared by melt blending and then filaments were obtained by melt extrusion method. The Scanning electron microscope (SEM) exhibited good dispersion of MWCNTs in the SAN phase of the ABS matrix. The rheological results showed that incorporation of MWCNTs into ABS resulted in higher storage modulus (G′) and loss modulus (G′′) than those of ABS, especially at low frequencies. The tensile strength and modulus of MWCNT/ABS nanocomposite filaments substantially increased with the MWCNTs content while the elongation at break decreased. Additionally, the addition of MWCNTs decreased the coefficient of linear thermal expansion. This study provides a basis for further development of MWCNT/ABS nanocomposites used for FDM process with desirable mechanical properties and good dimension stability.

Experimental and theoretical analysis of the mechanical and thermal properties of carbon nanotube/acrylonitrile–styrene–butadiene nanocomposites

In this work, experimental and theoretical analysis of the microstructure and mechanical properties of carbon nanotube (CNT)/Acrylonitrile–butadiene–styrene (ABS) nanocomposite were conducted. In addition, the thermal degradation behavior of the nanocomposite as function of CNT was investigated. CNT/ABS nanocomposites filled with up to 10 wt% CNT were prepared by melt mixing followed by compression molding. Due to the compatibility between the CNT and the styrene-acrylonitrile (SAN) part of the ABS matrix, excellent dispersion with good interfacial adhesion at the CNT/SAN interface was observed. This microstructure was found to significantly improve the nanocomposites' tensile strength and Young's modulus. Both the volume exclusion electrical percolation model and the Cox tensile modulus model expected that the aspect ratio of the nanofiller after melt mixing is about 80. This value is consistent with the experimentally measured value for the same type of nanotubes in literature.