Effect of Reaction Temperature on the Properties of Polyimide Dielectric Composites

Abstract

Polymer dielectric composites are fabricated by blending polyimide (PI) with poly(vinylidene fluoride) (PVDF) base on different temperature conditions. The dielectric and thermal properties of the composites are studied. Experimental results indicate that the dielectric properties of the composites are enhanced by increasing the reaction temperature, while all the resulted composites exhibit excellent thermal stability. Specifically, the sample showing optimized dielectric properties can be obtained at a reaction temperature of 50°C.

The Effects of Concentration and Particle Size of TiO2 on the Dielectric Properties of Polyolefin‐Based Microwave Substrates

“…The dielectric constant of Sample VII decreases from 7.63 (1 MHz) to 7.03 (10 GHz). The reason for the reduced dielectric constant is that the polarization of dipoles can not keep pace with the speed of external electric field at microwave frequency . Figure B) shows the dielectric loss of the laminates.…”