POLYCARBONATE FILMS FOR CAPACITORS, METHODS OF MANUFACTURE, AND ARTICLES MANUFACTURED THEREFROM

摘要

A film comprises a phthalimidine copolycarbonate comprising first repeating units and second repeating units different from the first repeating units, wherein the first repeating units are phthalimidine carbonate units; and the second repeating units comprise bisphenol carbonate units that are not the same as the first repeating phthalimidine carbonate units; and a second polycarbonate that is not a phthalimidine copolycarbonate; wherein the film has: a glass transmission temperature of greater than 170°C; a dielectric constant at 1 kHz, 23°C and 50% relative humidity of at least 3.0; a dissipation factor at 1 kHz, 23°C and 50% relative humidity of 1% or less; and a breakdown strength of at least 800 Volt/micrometer.