Dielectric relaxation spectroscopy in polymers: broadband ac-spectroscopy and its compatibility with TSDC

Author

Pelster, R.

Author_Institution

II. Phys. Inst., Koln Univ., Germany

fYear

1999

fDate

1999

Firstpage

437

Lastpage

444

Abstract

Dielectric spectroscopy provides information on molecular dynamics and free charge carriers. While a direct characterization of homogeneous material is possible, the permittivity of blends and mixtures also reflects the microstructure. Intrinsic parameters, such as relaxation time and relaxation strength of a polar component, are only obtained via an effective medium analysis. The superposition of independent relaxation processes can be analyzed in terms of 2-dimensional distributions of relaxation times and activation energies. Dielectric relaxation spectroscopy (DRS) and the measurement of thermally stimulated depolarization currents (TSDC) allow an independent evaluation and test of distribution functions

Keywords

dielectric relaxation; permittivity; polymer blends; polymers; thermally stimulated currents; 2-dimensional distributions; TSDC; activation energies; blends; broadband AC-spectroscopy; dielectric relaxation spectroscopy; dielectric spectroscopy; direct characterization; distribution functions; effective medium analysis; free charge carriers; homogeneous material; independent relaxation processes; intrinsic parameters; microstructure; mixtures; molecular dynamics; permittivity; polar component; polymers; relaxation strength; relaxation time; thermally stimulated depolarization currents; Charge carriers; Current measurement; Dielectric materials; Dielectric measurements; Electrochemical impedance spectroscopy; Independent component analysis; Microstructure; Permittivity; Polymers; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-5025-1

Type

conf

DOI

10.1109/ISE.1999.832080

Filename

832080