Dielectric dynamics of some nylon 6/CaCO_3 composites using broadband dielectric spectroscopy

摘要

Broadband dielectric spectroscopy (10~(-1) to 10~6 Hz) in combination with TSDC were employed to study the relaxations and the conductivity phenomena in polyamide 6/CaCO_3 composites loaded with different contents and particle sizes of treated and untreated CaCO_3. In addition to the primary α-relaxation associated with the glass transition, significant interfacial relaxation and ionic conduction processes have been revealed. The temperature dependence of the relaxation rates of α-relaxation and Maxwell-Wagner-Siller-process as well as that of the hopping rate of the conduction mechanism were found to follow the Vogel-Fulcher-Tammann-model. This may support the idea that the three mechanisms are not completely independent. The modification of the filler does not add any effect on the resistivity values.