High-Temperature Poly(phthalazinone ether ketone) Thin Films for Dielectric Energy Storage

Abstract

The synthesis and characterization of poly(phthalazinone ether ketone) (PPEK) for high-temperature electric energy storage applications is described. It was found that PPEK displayed excellent stability of the dielectric properties over a broad frequency and temperature range. Little change in the breakdown field and discharge time has been observed in PPEK with the increase of temperature up to 190 degrees C. A linear correlation between the AC conductance and the angular frequency implied that the hopping as a dominant conduction process contributed to the dielectric loss. Superior energy densities, remarkable breakdown strengths, and fast discharge speeds have been demonstrated in PPEK at various temperatures.

Flexible high-temperature dielectric materials from polymer nanocomposites

“…This brings extra weight, volume and energy consumption to the integrated power system and reduces its reliability and efficiency. The upsurge in lightweight and flexible electronic devices has also created a tremendous demand for high-temperature dielectric polymers, as the heat generated by electronic devices and circuitry increases exponentially with miniaturization and functionality.A variety of high-performance engineering polymers have been considered as possible high-temperature dielectric materials to address these urgent needs [15][16][17][18][19] . Until now, the key criteria established for evaluating high-temperature dielectric polymers has been the glass transition temperature (T g ) and thermal stability.…”

“…A variety of high-performance engineering polymers have been considered as possible high-temperature dielectric materials to address these urgent needs [15][16][17][18][19] . Until now, the key criteria established for evaluating high-temperature dielectric polymers has been the glass transition temperature (T g ) and thermal stability.…”

Properties of carbon fiber sized with poly(phthalazinone ether ketone) resin

“…At 250°C, the mass loss of T700M CF was only 0.37%, while the value of T700 CF was 0.41%; at 350°C mass loss of T700M, CF was 0.82%, while for T700 was 1.18%. Higher thermal stability of T700M CF compared to T700 CF resulted from the rigid asymmetric phenyl phthalazinone moiety into the polymer backbone, which yields the engineering polymers with high‐glass transition temperatures and outstanding thermo‐oxidative stability 24. Higher thermal stability made T700M CF possible to be applied in high‐temperature environment.…”

Light weight high temperature polymer film capacitors with dielectric loss lower than polypropylene

“…High temperature polymers such as polycarbonate (PC), polyphenylene sulfide (PPS), polyethylene naphthalate (PEN), polyetheretherketone (PEEK), modified PEEK, polyetherimide (PEI, UltemÒ 1000), polyimides (PI), and poly(tetrafluoroethylene-co-vinylidene difluoride-co-hexafluoropropylene) have been evaluated for high temperature film capacitor applications [10][11][12][13][14][15][16][17][18][19][20][21][22]. Due to their high T m and/or glass transition temperature (T g ), these polymers are thermally stable above125°C.…”