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

Abstract In this study conductive composites of low-density polyethylene (LDPE)/ethylene-vinyl acetate (EVA) filled with carbon black (CB) and carbon fiber (CF) were prepared by melt-mixing method. The morphological, rheological, and electrical properties of CB filled composites were compared with CF filled composites by digital multimeter, scanning electron microscope, rotational rheometer, etc. The composites filled with different fillers have same percolation threshold but the EVA concentration has different effect on the two systems. For CB filled composites the increase in EVA concentration decreased resistivity first and reached lowest point when the LDPE:EVA ratio was 70:30; then the resistivity increased, but for CF filled composites the resistivity continued to decrease. The differences were caused by the diverse morphological and filler distribution of two different composite systems. The rheological behaviors of two types of composites also had significant difference; the value of complex viscosity of CB filled composites was about two orders of magnitude more than CF filled composites in low frequency region. It was because CB particles was nano-scale and had large surface area, so it had great influence on the value of complex viscosity of composites.

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Reinforcement of Ethylene Vinyl Acetate with Carbon Black/Silica Hybrid Filler Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.852.16 ◽

2016 ◽

Vol 852 ◽

pp. 16-22

Author(s):

S. Vishvanathperumal ◽

S. Gopalakannan

Keyword(s):

Mechanical Properties ◽

Carbon Black ◽

Vinyl Acetate ◽

Abrasion Resistance ◽

Crosslink Density ◽

Testing Machine ◽

Ethylene Vinyl Acetate ◽

Hybrid Filler ◽

Tear Strength ◽

Silica Hybrid

Carbon black and silica have been used as the main reinforcing fillers that increase the usefulness of rubbers. In this work the effect of carbon black (high abrasion furnace)/silica hybrid fillers on the mechanical properties, crosslink density and morphological behaviour of ethylene vinyl acetate (EVA) was investigated. EVA reinforced with 0/50, 10/40, 20/30, 30/20, 40/10 and 50/0 phr of carbon black (CB)/silica hybrid filler. The total hybrid filler is kept constant at 50 phr (parts per hundred rubbers) and six different compounds were prepared. EVA, CB and silica followed by compounding on a two roll mill and molding at 180°C and 20 megapascal (MPa) pressure. The mechanical properties such as tensile & tear strength, elongation at break and 100% modulus have been measured at 23°C on universal testing machine. Abrasion resistance, hardness and rebound resilience are studied using DIN abrader, Shore A durometer and vertical rebound resilience respectively. The tensile strength, modulus, tear strength, abrasion resistance, hardness and crosslink density increased with the CB filler content in hybrid filler, reached the maximum value at 50 phr of high abrasion furnace carbon black. Morphological properties of composites were evaluated by scanning electron microscopy analysis.

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Effect of carbonized wood fiber and carbon black loading on density, tensile properties, electrical conductivity and swelling of ethylene vinyl acetate copolymer composites

Materials Today Proceedings ◽

10.1016/j.matpr.2019.06.086 ◽

2019 ◽

Vol 16 ◽

pp. 2016-2022

Author(s):

M.P.M. Hanif ◽

A.R. Rozyanty ◽

A.W.M. Kahar ◽

S.J. Tan ◽

A.G. Supri

Keyword(s):

Electrical Conductivity ◽

Carbon Black ◽

Tensile Properties ◽

Vinyl Acetate ◽

Wood Fiber ◽

Ethylene Vinyl Acetate ◽

Carbonized Wood ◽

Acetate Copolymer ◽

Ethylene Vinyl Acetate Copolymer ◽

Copolymer Composites

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The Effect of Crosslinking on the Electro-Thermal Properties of Carbon Black and Ethylene-Vinyl Acetate Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.903.119 ◽

2021 ◽

Vol 903 ◽

pp. 119-126

Author(s):

Sintija Eglite ◽

Astrida Berzina ◽

Māris Knite

Keyword(s):

Thermal Properties ◽

Carbon Black ◽

Vinyl Acetate ◽

Ethylene Vinyl Acetate ◽

Cross Linking ◽

Ptc Effect ◽

The Cross

Ethylene-vinyl acetate (EVA) and highly structured carbon black (CB) composites are promising for self-regulating heating materials, especially, were flexibility is needed. Two types of EVA-CB composites were made. Firstly, non-cross-linked EVA-CB composite was made with different CB concentrations and secondly, cross-linked EVA-CB composite with dicumylperoxide (DCP) as the cross-linking agent. Different concentrations of DCP were used. Samples were tested in two ways – by heating them internally (by applying 5V voltage) and externally (by heating in universal heating oven). The electro-thermal properties (including PTC effect) were determined.

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