Electrical conduction in a semicrystalline polyethylene terephthalate in high electric field

Hadri, B.; Mamy, P.R.; Martinez, J.J.; Mostefa, M.

doi:10.1016/j.ssc.2006.04.034

Cited by 11 publications

(9 citation statements)

References 5 publications

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“…4,8 The deformation in the amorphous morphology is approximately four times than that of semicrystalline, which is a predictable result because of the effect of crystallinity on the mechanical properties of PEN. [18][19][20] Also, this assertion is further supported because of the type of crystallite (b) developed at the surface. The amorphous sample has higher mobility of the chain segments under an electric field which can give an explanation to its threshold field shown in the curves I(F); the semicrystalline case is similar except that the deformation level is lower as well as the resulting current.…”

Section: Resultsmentioning

confidence: 95%

Mechanical deformation and electrical breakdown of PEN at high electric fields

Lotfy

Chávez-Lara

Boudou

et al. 2007

J of Applied Polymer Sci

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In this work, samples of amorphous and semicrystalline PEN (polyethylene-2,6-naphthalene dicarboxylate) were subjected to DC electric fields for different durations up to their dielectric breakdown, with or without depolarization. The field-induced mechanical strains in the samples were studied by means of a nondestructive optical technique without resorting to any physical contact. The results showed that amorphous samples were more vulnerable to the field-induced mechanical deformation when compared with similar semicrystalline samples. However, both morphologies showed in some samples contradictory behavior at prebreakdown field strength, some caused yielding of the polymer while the others seemed to have the opposite effect. In the latter category, yet some showed the maximum yield point at a particular critical field starting from which the deformation began to diminish significantly to reach a total cancellation at the breakdown field. This critical field quantified at 260 kV/ mm is probably a pronouncement of critical ageing and breakdown in PEN. The deformation seems to be an evolution very similar to the evolution of DC current at high fields. Furthermore, the varying response of the samples implies further work to be undertaken to validate a clear mechanism.

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Section: Resultsmentioning

confidence: 95%

Mechanical deformation and electrical breakdown of PEN at high electric fields

Lotfy

Chávez-Lara

Boudou

et al. 2007

J of Applied Polymer Sci

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“…The total electric field strength inside the insulator is important for investigations of insulator properties. For example, it is needed in order to determine if electric breakdown will occur at a particular value of electric field, or if charge carrier transfer caused by high electric field [13] will occur (e.g., hopping or tunneling of charge carrier between localization states), etc. Calculations indicate that the total electric field inside the insulator is initially largest near the substrate, and it becomes larger as the charge is being deposited.…”

Section: Resultsmentioning

confidence: 99%

The Dynamics of the Electric Field Distribution in the Surface of Insulating Film Irradiated by Air Ions

Kalade

Rinkūnas

Purlys

et al. 2016

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When deposited on a surface, electric charge usually accumulates near the tips of surface irregularities, from where it can be transferred to nearby objects due to ionization of ambient air. The amount of transferred charge, the rate of charge transfer, the size of the charged spot (e.g., on the surface of an insulator) and its tendency to spread will depend on properties of air during electric discharge, on the magnitude of charge accumulated at the tip of an object, on possibilities for replenishing that charge, on the time spent for charge transfer from the tip onto the insulating layer, on properties of the insulating layer, etc. Those properties are discussed in this work by comparing the results of measurements and theoretical analysis.

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“…The conduction mechanisms controlled by the bulk are complex and have several origins. The orientation of electrical dipoles (permanent or induced) by the effect of an external electrical field produces a current that can be measured [ 15 , 16 ]. Additionally, the injection of electrons can be evaluated through an electric current.…”

Section: Electrical Conduction In Polymersmentioning

confidence: 99%

Electrical Conduction Mechanisms in Ethyl Cellulose Films under DC and AC Electric Fields

Puente-Córdova,

Luna-Martínez,

Mohamed-Noriega

et al. 2024

Polymers

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This work reports the dielectric behavior of the biopolymer ethyl cellulose (EC) observed from transient currents experiments under the action of a direct current (DC) electric field (~107 V/m) under vacuum conditions. The viscoelastic response of the EC was evaluated using dynamic mechanical analysis (DMA), observing a mechanical relaxation related to glass transition of around ~402 K. Furthermore, we propose a mathematical framework that describes the transient current in EC using a fractional differential equation, whose solution involves the Mittag–Leffler function. The fractional order, between 0 and 1, is related to the energy dissipation rate and the molecular mobility of the polymer. Subsequently, the conduction mechanisms are considered, on the one hand, the phenomena that occur through the polymer–electrode interface and, on the other hand, those which manifest themselves in the bulk material. Finally, alternating current (AC) conductivity measurements above the glass transition temperature (~402 K) and in a frequency domain from 20 Hz to 2 MHz were carried out, observing electrical conduction described by the segmental movements of the polymeric chains. Its electrical properties also position EC as a potential candidate for electrical, electronics, and mechatronics applications.

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Electrical conduction in a semicrystalline polyethylene terephthalate in high electric field

Cited by 11 publications

References 5 publications

Mechanical deformation and electrical breakdown of PEN at high electric fields

Mechanical deformation and electrical breakdown of PEN at high electric fields

The Dynamics of the Electric Field Distribution in the Surface of Insulating Film Irradiated by Air Ions

Electrical Conduction Mechanisms in Ethyl Cellulose Films under DC and AC Electric Fields

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