Electrical conductivity under shear flow of molten polyethylene filled with carbon nanotubes: Experimental and modeling

Collet, Anatole; Serghei, Anatoli; Lhost, Olivier; Trolez, Yves; Cassagnau, Philippe; Fulchiron, René

doi:10.1002/pen.25651

Cited by 6 publications

(3 citation statements)

References 31 publications

(45 reference statements)

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“…Epoxy resin is the most important matrix in fiber reinforced resin matrix composites because of its excellent mechanical and molding process properties. [1][2][3][4][5] The types and applications of epoxy resin are becoming more and more extensive. [6,7] Various types of new high-performance epoxy resin have also produced to satisfy the requirements of national defense, aerospace and other special fields.…”

Section: Introductionmentioning

confidence: 99%

Tetraglycidyl ether 1.1.2.2‐tetraphenyl ethane epoxy resin modified by carbon nanotubes

Zhou

Lei

2022

Polymer Engineering & Sci

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Usually, the reinforcing effect of carbon nanotubes (CNTs) in a polymer is related to the properties of the matrix and its dispersion in the matrix. In this paper, the modification effect of CNTs on high performance tetraglycidyl ether 1.1.2.2-tetraphenyl ethane epoxy resin (TGETPE) was studied. CNTs grafted with amino groups (N-CNTs) were used to react with DGEBA to form a well dispersed CNTs / epoxy resin mixture (E-CNTs), and then E-CNTs were added to TGETPE/methyl tetrahydrophthalic anhydride (MeTHPA) to form a E-CNTs-reinforced TGETPE composites. The effect of different content of E-CNTs on TGETPE/MeTHPA cured resin was studied. With an increase in content of E-CNTs, the mechanical properties of the cured sample first increase and then decrease. At E-CNT contents of 0.4 and 0.6 wt%, the tensile strength and bending strength of the composites increased by 39% and 34%, respectively. Young's modulus of the cured composite increases with the addition of E-CNTs. In addition, the addition of E-CNTs can improve the thermal properties of the cured sample.

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Section: Introductionmentioning

confidence: 99%

Tetraglycidyl ether 1.1.2.2‐tetraphenyl ethane epoxy resin modified by carbon nanotubes

Zhou

Lei

2022

Polymer Engineering & Sci

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“…Conductive polymer composites (CPCs) are considered organic metals obtained by mixing an insulating polymer matrix (electrical conductivity order of 10 −9 S/cm) with a conductive filler, for example, carbon black (CB), carbon fiber (CF), carbon nanotubes (CNTs), graphene oxide, or graphene. [ 1–8 ] CPCs have high conductivity (~10 −1 S/cm), are light, resistant to oxidation, and, in general, have good mechanical properties compared to the polymer matrix. The electrical conductivity for CPCs using polypropylene (PP), poly(ethylene terephthalate) (PET), and nylon, filled with 20 wt% of CB, has an electrical conductivity of 5.1 × 10 −2 , 9.5 × 10 −2 , and 1.3 × 10 −2 S/cm, respectively, providing a variation up to seven orders of magnitude in comparison with the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the rheological and electrical percolation of high‐density polyethylene/carbon black composites using mathematical models

SiIva

Cavalcanti

Alves

et al. 2021

Polymer Engineering & Sci

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In this work, conductive polymer composites (CPCs) of bio‐based polyethylene (BioPe) containing different concentrations of carbon black (CB) were developed. By using oscillatory rheology analysis, a Newtonian plateau was observed in BioPe, and all BioPe/CB composites had a behavior of a pseudo‐solid and that composites with volume fractions ranging from 0.24 to 0.56 presented higher viscosity, storage, and loss modulus. This suggests the formation of a percolated network and by using the power‐law models, it was observed that the electrical percolation threshold was higher than the rheological percolation threshold. The electrical conductivity was measured using the four‐point probe method and a sigmoid model was used to predict the CPCs' electrical conductivity percolation threshold. The results indicated that the four‐point probe method presented satisfactory results according to the calculated standard deviations and voltage–current characteristics for each round of measurements considering the same ranging as used in rheology analysis. The analytical model used showed a coefficient of determination (R2) higher than 95%, allowing the prediction of the electrical conductivity of the CPC and the percolation threshold as a function of the volumetric fraction of the CB.

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“…Regarding the surface conductivity of nanocomposites, it was reported that the melt blending processes may induce a forced alignment effect. 34 This alignment does not result in a well-interconnected network; therefore, surface electrical conductivity is very low even when the percolation threshold is exceeded in the bulk (typically in the range of 10 7 −10 8 Ω/ sq). Surface electrical conductivity can be enhanced by thermal annealing.…”

Section: ■ Introductionmentioning

confidence: 99%

Near-Infrared Laser Direct Writing of Conductive Patterns on the Surface of Carbon Nanotube Polymer Nanocomposites

Haber

Noel

Lin

et al. 2021

ACS Appl. Mater. Interfaces

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Near-infrared (NIR) laser annealing is used to write conductive patterns at the surface of Polypropylene/Multi-walled carbon nanotube nanocomposite (PP/MWCNT) plates. Before irradiation, the surface of the nancomposite is not conductive due to the partial alignment of the MWCNT which occurs during injection molding. We observe a significant increase of the surface sheet resistance using NIR laser irradiation, which we explain by a randomization of the orientation of MWCNTs in the PP matrix melt by NIR laser irradiation. After only 5s of irradiation, the sheet resistance of PP/MWCNT, annealed with a laser at a power density of 7 W/cm 2 , decreases by more than 4 decades from ~ 100 MΩ/sq to ~ 1 kΩ/sq. Polarized Raman, TEM, and SEM are used to investigate the changes in the sheet resistance and confirm the physico-chemical processes involved. This allows directwriting of conductive patterns using NIR laser at the surface of nanocomposite polymer substrates, with the advantages of a fast, easy, and low-energy consumption process.

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Electrical conductivity under shear flow of molten polyethylene filled with carbon nanotubes: Experimental and modeling

Cited by 6 publications

References 31 publications

Tetraglycidyl ether 1.1.2.2‐tetraphenyl ethane epoxy resin modified by carbon nanotubes

Tetraglycidyl ether 1.1.2.2‐tetraphenyl ethane epoxy resin modified by carbon nanotubes

Evaluation of the rheological and electrical percolation of high‐density polyethylene/carbon black composites using mathematical models

Near-Infrared Laser Direct Writing of Conductive Patterns on the Surface of Carbon Nanotube Polymer Nanocomposites

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