Space charge formation in filled LDPE films

The effect of fillers on space charge formation or storage was studied. Thermally stimulated current (TSC) was measured to investigate the carrier traps in filled LDPE (low-density polyethylene) films. The characteristic relaxation time and activation energy of trapped carriers were calculated by computer simulation based on a single relaxation time model. Differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DTMA), and time-domain dielectric loss spectrometry (TDS) were also employed to analyze the effect of fillers on molecular relaxation behavior. The characteristic relaxation times for 10% 3A/LDPE and 5% 5A/LDPE are 4*10/sup -11/ s and 5*10/sup -11/ s, respectively. The corresponding activation energies are 0.5016 eV and 0.4878 eV.<<ETX>>