Dielectric Modulus Relaxation and Hopping Conduction Mechanism of Bisphenol A Corncobs Polycarbonate | ||||
| Egyptian Journal of Solids | ||||
| Article 8, Volume 34, Issue 1, 2011, Page 93-107 PDF (258.46 K) | ||||
| DOI: 10.21608/ejs.2011.148863 | ||||
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| Abstract | ||||
| Dielectric relaxation of bisphenol A corncobs polycarbonate (BPACC) has been studied in the temperature and frequency ranges of 310-400K and 100Hz-4MHz, respectively. A clear r, a, a' and b-relaxation processes are observed in these studied ranges of temperature and frequency. An analysis of the dielectric constant, e', and the dielectric loss index, e", was performed assuming a distribution of relaxation times as confirmed by the behavior of electric modulus spectra. The calculated activation energy, Ea, are 0.36eV, 0.17eV, and 0.09eV for a, a' and b-relaxation processes, respectively. The behavior of ac conductivity, sac, of BPACC sample revealed that the relaxation occurs as a result of charge carriers between localized states. The conduction mechanism of BPACC sample is controlled by the correlated barrier hopping model (CBH). | ||||
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