Study of Thermal and Dielectric Properties of (PVA-MnCl2.4H2O) Composit

The pure film of polymer (PVA) and films filled with Manganese Chloride (MnCl2.4H2O) salt with different weight ratios ((1,3,5,7,9,11,13,15) wt%) have been prepared by using casting method. The thermal and dielectric properties of (PVA-Manganese Chloride) composites films have been studied. The results of the thermal tests show that the behavior of the thermal conductivity coefficient for composites films was unsystematic after filling with different weight ratios of the added Manganese Chloride salt, the differential scanning calorimetric (DSC) test shows that in both the glass transition and crystalline melting point began an unsystematic increase by increasing the weight ratio of the added Manganese Chloride salt. The results of the dielectric measurements for composites films show that in both the dielectric constant and dielectric loss a decreases with increased the frequency, and the (A.C) electrical conductivity increases with increased the frequency, and increases the dielectric constant, dielectric loss and (A.C) electrical conductivity with the increase of the weight ratio of the added Manganese Chloride salt.