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Nonlinear dielectric and conductive spectra of polymers
Author(s) -
Furukawa Takeo
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930700121
Subject(s) - dielectric , nonlinear system , electrical conductor , materials science , spectral line , polymer , conductive polymer , composite material , optoelectronics , physics , quantum mechanics
Nonlinear complex permittivities have been measured as a function of frequency for various polar polymers by applying a sinusoidal electric field and detecting higher harmonic dielectric responses. It is shown that the Debye relaxation of the linear permittivity accompanies the third‐order nonlinear relaxation represented by ϵ 3 *=δϵ 3 /(1+iωϵ 3 ) 3 in accord with phenomenological prediction. Combinations of relaxation strengths, δϵ 1 and δϵ 3 , allow estimates of the saturation polarization as well as the moment and density of equivalent dipoles comprising the relaxation process. Analogous measurements and analysis have been extended to examine the nonlinear conductive spectra of ion‐conducting polymers.