Abstract
In this manuscript, the graphene oxide (GO) was modified by hyper-branched polyester (HBP). The effects of GO or modified GO (HBP-m-GO) on the mechanical performance and wearing properties were investigated. The results of X-ray photoelectron spectra (XPS), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM) revealed the successful grafting of HBP onto GO. The thermogravimetric analysis (TGA) indicated that the graft amount of HBP is calculated to be 9.6 wt%. The GO or HBP-m-GO was added into acrylonitrile-butadiene-styrene copolymer (ABS) to prepare the ABS/GO composites. The mechanical properties and wear performance of the composites were studied to comparatively study the impact of GO modification on the properties of the composites. The results revealed that the addition of GO has a significant effect on the mechanical properties of ABS, and when HBP-m-GO was added, the elastic modulus and tensile strength of ABS/HBP-m-GO increased evidently compared with ABS/GO. The tensile strength increased from 42.1 ± 0.6 MPa of pure ABS to 55.9 ± 0.9 MPa, up to 30%. Meanwhile, the elongation at break was significantly higher than ABS/GO to 20.1 ± 1.3%, slightly lower than that of pure ABS. For wear performance, the addition of raw GO decreased the friction coefficient, and when the HBP-m-GO was added, the friction coefficient of the ABS/HBP-m-GO dropped more evidently. Meanwhile, the weight loss during the wear test decreased evidently. The related mechanism was discussed.
Highlights
The acrylonitrile-butadiene-styrene (ABS) copolymer is a kind of plastic with excellent comprehensive properties [1,2]
The microstructures of graphene oxide (GO), modified GO, and hyper-branched polyester (HBP) were investigated by X-ray photoelectron spectra (XPS), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM)
The tensile strength increased from 42.1 ± 0.6 MPa of pure ABS to 55.9 ± 0.9 MPa, up to 30%
Summary
The acrylonitrile-butadiene-styrene (ABS) copolymer is a kind of plastic with excellent comprehensive properties [1,2]. Kharrat M et al [2] systematically studied the impact of 0–7.5 wt% graphite particles in the mechanical and tribological properties in ABS composites, and observed a significant decrease of elastic modulus and failure strain, improvement of friction behavior and anti-wear abilities after the addition of graphite They suggested that graphite strengthens the wear resistance of ABS composites and effectively reduces its adhesive and ploughing wear, and enhances the formation of a third body with better quality on the sliding stripe. Raza M et al [8] prepared thermally reduced graphene oxide (TRGO)/ABS composites, and comparatively studied the effects of pristine graphite and TRGO on the mechanical and thermal properties of composites. They reported that the combined solution and melt mixing technique can significantly improve dispersion of TRGO in the ABS matrix. Tishelogwraeprhethneanox1idnem,1t0h7 e lateral (nlsmaGiotzaOeloert)gae,ilyrstisrCaai0zdlo.es5e. inLwasatnd0em.d.r5,eeGa1Nunu.50dsa0enm12dg.-5zPiachDmsrooEiurc,me,rwocCemeahtisieevntpreaesud.r,srT.,cahhanenadsadevtdtehhrfeeargoccemoontnhtGeticunektannnotegfoszOsfhooOafutoGaAmOtnoiigmssshltoriiogwsnhehergrirgtthahhpaaenhnre1n2tn0hem%aTn,.etcAh2hle-0l %.111001A890 ll of the of the materials were used as received
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