Peculiarities of near-electrode relaxation processes in the polyethylene melt filled with graphite and carbon black

Kuryptya, Y

doi:10.15407/spqeo19.03.290

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…As in [24], for this research we used linear low-density polyethylene. The polymer hybrid composite was prepared of linear low-density polyethylene Sabic LLDPE 318B, calcite filler Omiacarb 2t-tn (median particle size is 2.7 µm) on soot N220 (Kremenchug Plant of Technical Carbon).…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the aim of the work was to study the dynamics of electrical conductance (from the first measurement) for composites suitable for use as heating elements, namely for the following composite: linear polyethylene + 20 wt.% soot + 20 wt.% CaCO 3 . As it follows from the analysis of the published data, the effect of carbon soot [23][24][25][26] and calcite [27] on the electrical properties of polymers were previously investigated. At the beginning of our studies, the results of other investigations where the above mentioned substances could be introduced into the polymer simultaneously were not known for us.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of the conductance temperature dependence for composite based on linear polyethylene with impurity of soot and calcite

Poberezhets¹

2019

Semicond. phys., quantum electron. optoelectron.

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Within the temperature 293 to 425 K and frequency 10 -3 to 10 6 Hz ranges by using the direct and alternating currents, the dynamics of electrical conductance σ of linear polyethylene with the impurity of 20 wt.% soot and 20 wt.% CaCO 3 (calcite) has been investigated. It has been shown that for the solid state of polyethylene (below 380 K), the dependence of electrical conductance on the temperature T on both the direct (σ DC ) and alternating (σ AC ) currents can be described by the power dependence on ( )is the temperature of the phase transition for polyethylene). It has been shown that when being repeatedly measured, the σ DC and σ AC values increase, and the power indexes of temperature dependence decrease. The measured values are stable after the fourth measurement. The greatest changes in the conductance, depending on the first and second measurements (almost three orders of magnitude), were observed at a temperature close to T 0 . It has been assumed that the dynamics of electrical conductance, depending on the number of measurements, is caused by the influence of the electric field on the ordering of impurity in polymer. It has been shown that for T > 380 K, the typical for liquids Arrhenius dependence of σ DC and σ AC on temperature is observed. It has been found that at the first measurement, the temperature dependence of σ DC and σ AC can be described by two activation energies, while for a stable state (starting from the fourth measurement)by one activation energy (within the measurement error of the same for σ DC and σ AC and equal to 1 eV).

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamics of the conductance temperature dependence for composite based on linear polyethylene with impurity of soot and calcite

Poberezhets¹

2019

Semicond. phys., quantum electron. optoelectron.

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Dynamics of temperature dependence of the dielectric properties of a nanocomposite material based on linear polyethylene in the vicinity of the percolation transition

Kovalchuk¹,

Kovalchuk²,

Garbovskiy³

et al. 2023

SPQEO

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Within the frequency range of 30 to 105 Hz and temperatures of 18 to 80 °C, the dielectric properties of linear low-density polyethylene with impurities of flame retardant (20 wt.%) and multilayer carbon nanotubes (1.5 wt.%) were investigated using the oscilloscopic method. This concentration value of carbon nanotubes slightly exceeds the concentration of nanotubes (1%), at which the percolation transition begins for the dependence of the polymer electrical conductivity on the content of nanotubes. It has been shown that the frequency dependence of electrical conductivity can be approximated by two exponential dependences. It has been found that when the sample is cooled, changes in the values of dielectric permittivity and electrical conductivity do not occur in the same way as when heated. The temperature dependences of conductivity for low (102 Hz) and high (104 Hz) frequencies have been obtained.

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Peculiarities of near-electrode relaxation processes in the polyethylene melt filled with graphite and carbon black

Cited by 2 publications

References 11 publications

Dynamics of the conductance temperature dependence for composite based on linear polyethylene with impurity of soot and calcite

Dynamics of the conductance temperature dependence for composite based on linear polyethylene with impurity of soot and calcite

Dynamics of temperature dependence of the dielectric properties of a nanocomposite material based on linear polyethylene in the vicinity of the percolation transition

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