On the high temperature TSDC peak in poly(ϵ-caprolactone)

The high temperature dielectric relaxation process, observed above the glass transition temperature in poly(ϵ-caprolactone) is studied by Thermally Stimulated Depolarization Currents experiments. The characterization is made by using the windowing polarization technique, decomposing the complex high...

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Bibliographic Details
Published in:Polymer (Guilford) 2000, Vol.41 (19), p.7223-7230
Main Authors: Hernández, M.C, Laredo, E, Grimau, M, Bello, A
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Poly(ϵ-caprolactone)
Properties and characterization
Thermal sampling
Thermally stimulated depolarization current
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Summary:The high temperature dielectric relaxation process, observed above the glass transition temperature in poly(ϵ-caprolactone) is studied by Thermally Stimulated Depolarization Currents experiments. The characterization is made by using the windowing polarization technique, decomposing the complex high temperature relaxation into Debye-like peaks. The profile of each peak is then analyzed by using a general kinetic order model, and the origin of the complex relaxation is discussed through the analysis of the parameters obtained from the best fit to the model. The distribution of the trap depths is obtained and their activation energies is found to vary from 0.8 to 1.2 eV. The space charge accumulation is mainly responsible for this relaxation mode in poly(ϵ-caprolactone).
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(00)00046-X