Analysis of complex dielectric spectra.: I.: One-dimensional derivative techniques and three-dimensional modelling

被引:495
作者
Wübbenhorst, M [1 ]
van Turnhout, J [1 ]
机构
[1] Delft Univ Technol, Dept Polymer Mat & Engn, NL-2628 BL Delft, Netherlands
关键词
D O I
10.1016/S0022-3093(02)01086-4
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Several strategies for the analysis of isochronal and isothermal spectra as well as complete three-dimensional (313) spectra are outlined and applied to data of (glass forming) liquids and polymers. Conduction-free loss spectra are calculated using a compact solution of the Kramers-Kronig transformation and an approximation based on partial derivativeepsilon'/partial derivative In omega. The usefulness of the dielectric modulus for data analysis is also evaluated. Apart from partial derivativeepsilon'/partial derivative In omega. other useful derivatives in the frequency and temperature domain are treated as well. Finally, we describe the evaluation of 3D-relaxation maps by means of 3D fitting. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码:40 / 49
页数:10
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