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Electrical behavior of polycarbonate doped with nickel chloride
Author(s) -
Amin M.,
Mounir M.,
Darwish K. A.,
Elez M. Abu
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070581308
Subject(s) - polycarbonate , doping , materials science , conductivity , thermal conduction , space charge , electrical resistivity and conductivity , nickel , analytical chemistry (journal) , ion , electric field , polarization (electrochemistry) , chemistry , electrical engineering , electron , composite material , optoelectronics , metallurgy , physics , chromatography , organic chemistry , quantum mechanics , engineering
The dc electrical conductivity (σ) and permittivity (ε′) of polycarbonate (PC) discs doped with different concentrations of NiCl 2 are studied. Both (σ) and (ε′) increase with increasing the concentration of NiCl 2 , with a maximum value at 30 wt %. The activation energies for pure and doped PC are 0.49 and 0.53 eV, respectively. The increase in the electrical conductivity with increasing NiCl 2 concentration is attributed to the formation of chargetransfer complexes (CTC); the increase in ε′ may be due to the rise in the interfacial polarization which results from the increase in boundaries between PC and NiCl 2 phases. The currents in PC discs, both pure and doped with NiCl 2 , in the high‐field region are attributed to space charge limited conduction. The time dependence of conduction current before and after reversal of applied voltage is also investigated. Some parameters such as the density of mobile ions and their drift mobilities are estimated. © 1995 John Wiley & Sons, Inc.