Temperature induced phase transition in nanocomposites based on low-density polyethylene matrix

The temperature dependence of the complex dielectric permittivity of composites based on a low-density polyethylene matrix containing dispersed nanoparticles of copper and zinc oxides has been studied. It is established that a phase transition takes place in the volume of a composite at a temperature of about 60°C. Exposure of the composite samples to a flux of 10-keV electrons leads to changes in the temperature dependence of the permittivity. Mechanisms are proposed that can explain the observed behavior.