Performance stabilization of conductive polymer composites

Hou, Yan Hui; Zhang, Ming Qiu; Rong, Min Zhi

doi:10.1002/app.12465

Cited by 17 publications

(7 citation statements)

References 14 publications

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“…Although the increase in VA content undermines some properties, it leads to several improvements for electrical applications such as high dielectric strength, high volume resistivity against low and moderate voltages, and suitable compatibility with polar polymers for blending. [1,[4][5][6][7] Ethylene vinyl acetate (EVA) and its conductive composites are widely used in electrical cables [8], self-regulating heaters and sensors [9,10], electronic devices in the automotive industry [11,12], and electromagnetic interference shielding (EMI) applications [1,13]. The use of neat EVA copolymer without additives features some drawbacks involving low electrical and thermal conductivity and sometimes inadequate mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Electrical and thermal conductivity of ethylene vinyl acetate composite with graphene and carbon black filler

et al. 2018

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Ethylene vinyl acetate (EVA) composites, including two different carbonaceous conductive fillers, carbon black (CB) and commercially available graphene (G), were fabricated by solventcasting and melt compounding methods. The effect of additives and process conditions on electrical and thermal properties of composites was investigated. The dielectric responses of EVA composites were characterized by a percolation threshold of 15 wt % for EVA/G prepared by solvent-casting. However, as the EVA/G15% was also subsequently extruded, the applied shear stress induced by extrusion caused deterioration of the electrical network and reduced the composite's electrical conductivity. A percolating network was found for the EVA composites containing CB at around 5-7 wt % with 10 orders of magnitude increase in electrical conductivity with respect to the neat EVA. The thermal conductivity of EVA/CB7% and EVA/G15% increased 16 and 22 % respectively, in comparison to the neat EVA. Both additives increased the electrical and thermal conductivity of composites to be appropriate as jackets for high-voltage cables.

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Section: Introductionmentioning

confidence: 99%

Electrical and thermal conductivity of ethylene vinyl acetate composite with graphene and carbon black filler

et al. 2018

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“…al. [10] have studied the performance stabilization of conductive polymer composites filled with carbon black (CB). They obtained that the in situ grafting of acrylic acid at the filler/matrix interaction could effectively improve the short-term performance stability of the composites.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Natsuki¹,

Ni²,

Wu³

2008

Polymer Engineering & Sci

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This paper described the temperature dependence of electrical resistivity for carbon nanofiber (CNF)/unsaturated polyester resin (UPR) nanocomposites prepared by a solvent evaporation method. It was found that the CNF/UPR nanocomposites had quite low electrical percolation threshold due to CNFs having a large aspect ratio and being well dispersed into the UPR matrix. A Sharp decrease in the electrical resistivity was observed at about 1 wt% CNF content. The influence of CNF content on the electrical resistivity was investigated as a function of temperature in detail. The nanocomposites showed a positive temperature coefficient (PTC) effect for the resistivity, and had a strong temperature dependence near the percolation threshold. When the number of thermal cycles was increased, the electrical resistivity decreased and had a weak temperature dependence, especially in the case of melting temperature. Moreover, the size influences of CNFs on the electrical properties of nanocomposites were analyzed and discussed.

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“…The stability of electrical properties is critical for the applications of conductive foam composites and needs in industrial application as EMI‐shielding or electrostatic discharge (ESD) protection materials, especially when they are used in a widely varied temperature range 26–28. Figure 3 shows the resistivity‐temperature behaviors for the CNTs/PU foam composites with different CNT concentration.…”

Section: Resultsmentioning

confidence: 99%

Electrical conductivity and major mechanical and thermal properties of carbon nanotube‐filled polyurethane foams

Yan

Dai

Xiang

et al. 2011

J of Applied Polymer Sci

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The carbon nanotubes (CNTs)/rigid polyurethane (PU) foam composites with a low percolation threshold of $ 1.2 wt % were prepared by constructing effective conductive paths with homogeneous dispersion of the CNTs in both the cell walls and struts of the PU foam. The conductive foam presented excellent electrical stability under various temperature fields, highlighting the potential applications for a long-term use over a wide temperature range from 20 to 180 C. Compression measurements and dynamical mechanical analysis indicated 31% improvement in compression properties and 50% increase in storage modulus at room temperature in the presence of CNTs (2.0 wt %). Additionally, the incorporation of only 0.5 wt % CNTs induced remarkable thermal stabilization of the matrix, with the degradation temperature increasing from 450 to 499 C at the 50% weight loss.

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Performance stabilization of conductive polymer composites

Cited by 17 publications

References 14 publications

Electrical and thermal conductivity of ethylene vinyl acetate composite with graphene and carbon black filler

Electrical and thermal conductivity of ethylene vinyl acetate composite with graphene and carbon black filler

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Electrical conductivity and major mechanical and thermal properties of carbon nanotube‐filled polyurethane foams

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