自组织临界模型用于聚合物的介电弛豫

Model of self-organized criticality used indielectric relaxation of polymer

用极值动力学模型引入自组织临界中OFC模型的能量传递能量α ,得到了同时与KWW方程和幂律均相关的介电弛豫的函数关系 .理论分析与用时域介电谱方法测量的聚丙烯在 -1 5℃～ 90℃慢极化电荷的驰豫过程基本相同 .由此可知KWW方程的参量 β反映了外界温度对材料驰豫单元的影响 ;

Model of extreme value dynamics is used by introduceing the energy transfer parameter ~{*'&A*'~} in the OFC model of self-organized criticality(SOC) and a correlation both with KWW function and power law function is obtained.Theoretic analysis and experimental results are consistent where time domain dielectric relaxtion is used to measure the decay process of slow polarized charges of PP between-15 to 90.The results show the of KWW function reflecting the influence of temperature on relaxation element of meterial and parameter a reflecting the amount of energy transfer and temperature.