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Dielectric properties of amorphous cellulose acetate‐butyrate polymer films
Author(s) -
Reddy N. Venugopal,
Kumar C. Ramesh,
Rao V. V. R. Narasimha
Publication year - 1993
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.4990320408
Subject(s) - dissipation factor , dielectric , materials science , dielectric loss , amorphous solid , conductivity , relaxation (psychology) , polymer , thermal conduction , analytical chemistry (journal) , electrical resistivity and conductivity , polymer chemistry , composite material , chemistry , organic chemistry , electrical engineering , optoelectronics , psychology , social psychology , engineering
The dielectric constant, loss tangent and AC conductivity of solution grown cellulose acetate‐butyrate films of 5μm thickness were studied as a function of temperature (300‐450 K) in the frequency range 10 Hz‐10 MHz. The decrease in dielectric constant was observed with the increase in frequency as well as with temperature. A loss peak was observed in the dielectric loss spectra and was identified as the β‐relaxation peak. The frequency‐dependent conductivity was also studied. The results were interpreted in terms of electronic conduction via hopping processes.