Dielectric properties of carbon-nanotube/amino-functionalized poly(arylene ether ketone) composites

Abstract

Novel a-MWNTs/NH₂PAEKK nanocomposite, with a high dielectric constant, low dielectric loss and high breakdown field, were prepared to use a solution blending technique. The uniform dispersion of a-MWNTs in the NH₂PAEKK matrix was realized. The dielectric constant of percolating nanocomposites (the a-MWNTs volume fraction of 0.09) was as high as 60 at 10³ Hz, it was about 20 times larger than the dielectric constant of NH₂PAEKK, and the breakdown field was near 41.4 MV m⁻¹. For $f_{\text{a}\text{-}\text{MWNTs}}<f_{\text{c}}$ , the dielectric loss of a-MWNTs/NH₂PAEKK nanocomposite was always less than 1. The nanocomposites had tensile strength of 69.2 MPa and tensile modulus of 3.0 GPa.