Optimization of Dielectric Constant of Polycarbonate/Polystyrene Modified Blend by Ceramic Metal Oxide

Abstract

We modified a polycarbonate (PC)/polystyrene (PS) blend by loading alumina (Al₂O₃) into the blend. X-ray diffraction (XRD) shows a decrease in crystallinity. The optical microscopy and atomic force microscopy (AFM) confirms the homogeneous dispersion of alumina. The differential scanning calorimetry (DSC) data shows improved results in glass transition (T_g) and melting temperature (T_m) of blend systems. The electrical properties of polymer blends modified by Al₂O₃ were studied as a function of frequency (50 Hz–35 MHz) at 323 K. The alumina showed a significant effect in resulting in a high dielectric constant with low dielectric loss and dissipation factor.

GRAPHICAL ABSTRACT

Keywords:

• DSC
• Electrical properties
• Morphology
• Polymer blends