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Dielectric behaviour of iron‐doped cellulose acetate films
Author(s) -
Sharma A. K.,
Ramu Ch.
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990290311
Subject(s) - dopant , dielectric , doping , materials science , dielectric loss , capacitance , analytical chemistry (journal) , cellulose acetate , atmospheric temperature range , cellulose , chemistry , electrode , organic chemistry , optoelectronics , thermodynamics , physics
Abstract The effect of iron doping and its concentration on the dielectric properties of cellulose acetate films was studied as a function of temperature (range 300–440 K) and frequency (range 10 kHz‐10 MHz). Undoped films exhibited a peak near 350 K in the capacitance versus temperature plots, while the dielectric loss exhibited two peaks. The dielectric capacitance decreased with increased dopant concentrations while the dielectric loss showed an increase. The peak positions, however, shifted towards higher temperatures in both cases. Presence of dopant ions and formation of charge transfer complexes/molecular aggregates are suggested as the possible reasons for this behaviour.