Dielectric Relaxation Studies of Cellulose-Water Mixtures Using Time and Frequency Domain Technique

Saknure, S H; Garad, N P; Gubre, A G; Joshi, Y S; Kumbharkhane, A C

Abstract

The complex dielectric permittivity of hydroxypropyl methyl cellulose (HPMC)-water mixture was measured by using Time Domain Reflectometry (TDR) and Frequency Domain (LCR) Technique at 25 oC. The complex dielectric permittivity e*(w), complex electrical modulus M*(w), complex electrical conductivity s*(w), loss tangent (tan d), static dielectric constant (ε0) and relaxation time (τ) have been determined for the cellulose-water system.


Keyword(s)

Complex permittivity spectra; Relaxation time; Electrode polarization; Precision LCR meter; TDR; HPMC


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