The use of polymer alloys blends and composites have grown constantly at 9% in the last 10 years and it
is four times the growth rate of total plastic industry. In this study, we report the polymerization process of undoped
and doped Polymethyl methacrylate (PMMA) with different dye concentrations .The dielectric properties of PMMA
(undoped and doped) polymerized by laser beam irradiation have been compared with those polymerized with laser
beam irradiation effects in order to establish the superiority of the laser beam irradiation process over the
conventional polymerization. Compared to pure polymer, the dielectric constant of the dye- polymer composites is
greater for all fill concentrations because the system becomes more heterogeneous than the pure polymer as more
dye is added to it. The increase in ε΄ with increase in dye is attributed to the formation of clusters, which lead to
greater average polarization and thus a greater contribution to dielectric constant. In case of modified PMMA with
dye concentration less than and equal to the percolation threshold, one could observe a gradual increase in ε΄ with
laser energy up to 100 Joules followed by an abrupt increase till 150 Joules. An RC electric equivalent circuit model
was successfully for our sample to declare the effect of both dye concentration and laser beam energies on the
dielectric properties of the tested samples. |
