Abstract
Makrofol-De polycarbonate is a class of polymeric solid state nuclear track detector which has many applications in various industrial fields. A study of the modification possibility of the dielectric properties of a Makrofol polymer using laser irradiation has been carried out. In the present work, Makrofol samples were irradiated using different fluences between 0.47 and 10.4 J/cm(2) of 5 W infrared laser. The modifications in the laser irradiated Makrofol samples have been studied as a function of fluence using dielectric constant epsilon', dielectric loss epsilon '', and AC conductivity sigma(AC) measurements. The frequency dependencies (100 Hz-5 MHz) of epsilon', epsilon '' and sAC at 35 degrees C were investigated. The dielectric constant epsilon', dielectric loss epsilon '' and AC conductivity sAC were also found to increase on heating up to 100 degrees C. The results indicate that epsilon', epsilon '' and sAC depend not only on the frequency and temperature but also on the laser fluence.