High?? and High?Temperature Dipolar Glass Polymers Based on Sulfonylated and Cyanolated Poly(Arylene Ether)s for Capacitive Energy Storage

High energy density, high temperature, and low loss dielectric polymers have drawn increasing attention in research owing to their potential applications power electronic pulsed devices. In this study, a new class of organo-soluble dipolar glass (DGPs) are synthesized via polycondensation post-functionalization poly(aryl ether)s (PAEs) based on phenolphthalin. Due the nonplanar backbone structure, strongly side groups (-SO2CH3 -CH2CH2CN) can easily rotate these PAEs. As result, desirable physical properties obtained: constant (4.4–5.6), transition temperature (155–180 °C), good mechanical property, (dissipation factor < 0.005). Among them, cyanolized ether nitrile) exhibit highest discharged density 8.6 J cm?3 at 650 MV m?1 room with efficiency 94.3%. At 100 °C, poly(ether ketone) shows 7.3 600 91%. Furthermore, functionalized PAEs toughness tensile strength break 60-120 MPa elongation ?5%. Based thermal, mechanical, properties, phenolphthalin-based promising for such as film capacitors.