Role of Water in Dielectric Properties of Starch Membranes - Natural Polymers, Biopolymers, Biomaterials, and Their Composites, Blends, and IPNs - page 297

of Maxwell-Wagner-Sillars (MWS) relaxation that arises from the charge carriers ac-
cumulated at the interphase between amorphous and crystalline regions.
Figure 7
Conductivity measurements
The conductivity of the samples at 20°C is shown in Figure 8. It is observed that at
high frequencies the conductivity of dry starch is greater than that of starch with water
in it. It is also observed that the conductivities for starch with 51 and 75% humidity
coincide at high frequencies (> 10 5 Hz). The conductivity at low frequency (~ 1 Hz)
increases as the water content increases.
Figure 8