Electrical Behavior of the Insulator Class-E around Glass Transition: Experimental and Numerical Analyses

Currents flowing through semicrystalline polyethylene terephthalate (PET) film were measured over the temperature range 60°-100°C in electric fields from 24 × 10 6 to 72 × 10 6  V/m. A study of the influence of these external stresses on the electrical behavior of PET, at glass transition phase, per...

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Bibliographic Details
Published in:International journal of polymer analysis & characterization 2014-08, Vol.19 (6), p.532-548
Main Authors: Berdous, S., Amroun, N. Saidi, Saidi, M., Bendaoud, M.
Format: Article
Language:English
Subjects:
Bipolar carriers
Class-E insulator
Computer simulation
Electric fields
Electrical response
Glass transition
Insulators
Mathematical models
Numerical analysis
Numerical simulation
Phase transitions
Polarization
Polyethylene terephthalate
Polyethylene terephthalates
Relaxation time
Simulation
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Summary:Currents flowing through semicrystalline polyethylene terephthalate (PET) film were measured over the temperature range 60°-100°C in electric fields from 24 × 10 6 to 72 × 10 6  V/m. A study of the influence of these external stresses on the electrical behavior of PET, at glass transition phase, permitted interpreting its response in terms of dipolar relaxation and movements of free charges. The simulation of the charging current around the glass transition temperature using a model consisting of the presence of bipolar carriers and one kind of permanent dipole with relaxation time τ allowed reproducing the experimental behavior. From this numerical calculation, space dependence of charge densities and field can be determined in order to explain the electrical behavior of current, which depends on parameters such as injection coefficient A i , relaxation time τ, and mobility μ.
ISSN:1023-666X
1563-5341
DOI:10.1080/1023666X.2014.932222