Poly(ethylene terephthalate)/carbon nanotube composites prepared with chemically treated carbon nanotubes

Yeşil, Sertan; Bayram, Göknur

doi:10.1002/pen.21938

Cited by 41 publications

(26 citation statements)

References 87 publications

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“…In addition, the attachment of functional groups on CNTs walls reduces electrical conductivity of the nanocomposites. Several authors reported observation of low composites conductivities because of acid treatment [23][24][25]. They ascribed this performance to the formation of functional groups and defects sites on the surface of the A-MWCNTs after modification process using acid treatment.…”

Section: Electrical Conductivity and Percolation Threshold Valuesmentioning

confidence: 99%

Impact of carbon nanotubes addition on electrical, thermal, morphological, and tensile properties of poly (ethylene terephthalate)

Alshammari

Wilkinson

2016

Appl Petrochem Res

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In this study, multi-walled carbon nanotubes (MWCNTs) were incorporated into poly (ethylene terephthalate) (PET) matrix in their as-received (A-MWCNTs) and treated (T-MWCNTs) forms. Melt-compounding method was used for the preparation of these carbon nanotubes (CNTs)-reinforced PET composites. The electrical conductivity, thermal stability, morphological, and tensile properties were investigated. For testing and characterization, impedance spectroscopy, thermo-gravimetric analysis, scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy and tensile testing were utilized. The results demonstrates that an incorporation of *0.25 wt% A-MWCNTs, an electrically conductive polymer nanocomposite (*0.2 S/m), was formed with a low percolation threshold (*0.33 wt%). In contrast, at the same loading of T-MWCNTs or even up 2 wt% did not yield conductive polymer. Presumably, such behavior is attributed to the acid treatment that disrupted the inherent electrical conductivity of the CNTs and also reduced their aspect ratio. Nevertheless, T-MWCNTs showed a better dispersion and distribution into the PET matrix than that of A-MWCNTs counterpart. Moreover, an improved tensile behavior was observed for T-MWCNTs incorporated composites than that of A-MWCNTs counterpart. Improved thermal stability was observed for PET/ A-MWCNTs in both the air and nitrogen atmospheres. Whereas, PET/T-MWCNTs exhibited the highest thermal stability in all samples in nitrogen atmosphere. However, poor thermal response was seen in air atmosphere.

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Section: Electrical Conductivity and Percolation Threshold Valuesmentioning

confidence: 99%

Impact of carbon nanotubes addition on electrical, thermal, morphological, and tensile properties of poly (ethylene terephthalate)

Alshammari

Wilkinson

2016

Appl Petrochem Res

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“…The graphitic sidewalls of the CNTs are not altered, and allow TÍ-TÍ stacking interactions with the adsorbed polymer. The main advantage of this approach is that preserves the intrinsic properties of the CNTs; however, the polymer wrapping decreases the aspect ratio of the reinforcement, and the forces between the CNTs and the polymer are weak, thus the efficiency of the load transfer in the composites might be low [4]. The covalent strategy generally involves nanotubes bound to carboxylic groups in amidation or esterification reactions with amine or hydroxyl groups of polymers or organic molecules [5,6].…”

Section: Introductionmentioning

confidence: 99%

Towards the development of poly(phenylene sulphide) based nanocomposites with enhanced mechanical, electrical and tribological properties

Díez‐Pascual

Naffakh

2012

Materials Chemistry and Physics

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Novel poly(phenylene sulphide) (PPS) nanocomposites reinforced with an aminated derivative (PPS-NH2) covalently attached to acid-treated single-walled carbon nanotubes (SWCNTs) were prepared via simple melt-blending technique. Their morphology, viscoelastic behaviour, electrical conductivity, mechanical and tribological properties were investigated. Scanning electron microscopy revealed that the grafting process was effective in uniformly dispersing the SWCNTs within the matrix. The storage and loss moduli as a function of frequency increased with the SWCNT content, tending to a plateau in the low-frequency regime. The electrical conductivity of the nanocomposites was considerably enhanced in the range 0.1-0.5 wt% SWCNTs; electrical and rheological percolation thresholds occurred at similar nanotube concentrations. Mechanical tests demonstrated that with only 1.0 wt% SWCNTs the Young's modulus and tensile strength of the matrix improved by 51 and 37%, respectively, without decrement in toughness, ascribed to a very efficient load transfer. A moderate decrease in the friction coefficient and a 75% reduction in wear rate were found for the abovementioned nanotube loading, indicating that PPS-NH2-g-SWCNTs are good tribological additives for thermoplastic polymers. Based on the promising results obtained in this work, it is expected that these nanofillers will be used to develop highperformance thermoplastic/CNT nanocomposites for structural applications.

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“…c can be calculated using the enthalpies of both crystallization and melting, according to the following equation [27,28]. c of PET and its nanocomposite was calculated from the first-heat run as these data reflect the thermal history of the samples.…”

Section: Crystallization Behaviormentioning

confidence: 99%

Electrical, Thermal, and Morphological Properties of Poly(ethylene terephthalate)-Graphite Nanoplatelets Nanocomposites

Alshammari

Wilkinson²,

Almutairi

2017

International Journal of Polymer Science

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Graphite nanoplatelets (GNP) were incorporated with poly(ethylene terephthalate) (PET) matrix by melt-compounding technique using minilab compounder to produce PET-GNP nanocomposites, and then the extruded nanocomposites were compressed using compression molding to obtain films of 1 mm thickness. Percolation threshold value was determined using percolation theory. The electrical conductivity, morphology, and thermal behaviors of these nanocomposites were investigated at different contents of GNP, that is, below, around, and above its percolation threshold value. The results demonstrated that the addition of GNP at loading >5 wt.% made electrically conductive nanocomposites. An excellent electrical conductivity of ∼1 S/m was obtained at 15 wt.% of GNP loading. The nanocomposites showed a typical insulator-conductor transition with a percolation threshold value of 5.7 wt.% of GNP. In addition, increasing screw speed enhanced the conductivity of the nanocomposites above its threshold value by ∼2.5 orders of magnitude; this behavior is attributed to improved dispersion of these nanoparticles into the PET matrix. Microscopies results exhibited no indication of aggregations at 2 wt.% of GNP; however, some rolling up at 6 wt.% of GNP contents was observed, indicating that a conductive network has been formed, whereas more agglomeration and rolling up could be seen as the GNP content is increased in the PET matrix. These agglomerations reduced their aspect ratio and then reduced their reinforcement efficiency. NP loading (>2 wt.%) increased degree of crystallinity and improved thermal stability of matrix slightly, suggesting that 2 wt.% of GNP is more than enough to nucleate the matrix.

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Poly(ethylene terephthalate)/carbon nanotube composites prepared with chemically treated carbon nanotubes

Cited by 41 publications

References 87 publications

Impact of carbon nanotubes addition on electrical, thermal, morphological, and tensile properties of poly (ethylene terephthalate)

Impact of carbon nanotubes addition on electrical, thermal, morphological, and tensile properties of poly (ethylene terephthalate)

Towards the development of poly(phenylene sulphide) based nanocomposites with enhanced mechanical, electrical and tribological properties

Electrical, Thermal, and Morphological Properties of Poly(ethylene terephthalate)-Graphite Nanoplatelets Nanocomposites

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