Intrinsic high-<i>k</i>–low-loss dielectric polyimides containing <i>ortho</i>-position aromatic nitrile moieties: reconsideration on Clausius–Mossotti equation

Abstract

Intrinsic high-<italic>k</italic>–low-loss dielectric polyimides containing <italic>ortho</italic>-position aromatic nitrile moieties were synthesized. 2CN-BTDA shows a <italic>D</italic>_k of 4.80, <italic>D</italic>_f of 1.57 × 10⁻³ at 1 kHz (25 °C), <italic>E</italic>_B of 219.4 kV mm⁻¹ with energy density of 1.023 J cm⁻³ and <italic>T</italic>_g of 325 °C.