OFC Model of SOC Used to Dielectric Relaxation of PP

Concept of energy transfer from over-critical value elements and related parameterαin the OFC model of self-organized criticality (SOC) are introduced into the model of extreme value dynamics. The result of dielectric relaxation function shows a correlation both with KWW function and power law function. Time domain dielectric spectroscopy is used to measure the decay process of slow polarized charges of PP between -15℃to 90℃. The results show that relaxation is power law in lower temperature and relaxation changes from power law to KWW function in upper temperature. Theoretic analysis and experimental results are consistent which imply the βof KWW function reflecting the influence of temperature on relaxation element of material and parameterareflecting the amount of energy transfer and temperature. Whenβis lower orais larger, power law relaxation is more distinct.