Preparation and Pyroelectric Properties of Poly(pentafluorostyrene)‐r‐Poly(4‐vinylaniline) Copolymer Films

In this study poly(pentafluorostyrene)‐ ran ‐poly(4‐vinylaniline) (PPFS‐ r ‐PVA) was synthesized by solution polymerization with AIBN utilized as an initiator. The dilute THF solution of the resultant copolymer was spin‐coated onto clean Ag/Si(100) substrates, and then the copolymer film was electrically poled at 85 °C for 30 min using a plane poling method with a poling voltage of 7.0 kV. The pyroelectric coefficient was determined by a digital integral method and carried out with a charge integral instrument. It was observed that the average pyroelectric coefficient of the resultant PPFS‐ r ‐PVA was 20.4 µC/cm 2 K in the range of 20–45 °C, and the average dielectric loss is about 0.2298 between 3.2 × 10 4 –1.0 × 10 6 Hz.