Crown ether-containing polyimides with high dielectric constant

Abstract

Polyimides (PIs) as a dielectric material have attracted much attention due to their good mechanical properties and thermal stability. However, the low dielectric constant of traditional PIs greatly restricts their applications in dielectric capacitors. Here we introduce crown ether groups into PI to increase the polarization of molecular chains. The resultant crown ether-containing PI films showed high dielectric constant and low dielectric loss, but without sacrificing the mechanical and thermal properties.