High‐Temperature and High‐Energy‐Density Dipolar Glass Polymers Based on Sulfonylated Poly(2,6‐dimethyl‐1,4‐phenylene oxide) |
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| Authors: | Zhongbo Zhang Dr David H Wang Prof Morton H Litt Dr Loon‐Seng Tan Prof Lei Zhu |
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| Institution: | 1. Department of Macromolecular Science and Engineering and Department of Chemistry, Case Western Reserve University, Cleveland, OH, USA;2. Materials and Manufacturing Directorate, Soft Matter Materials Branch (AFRL/RXAS), Air Force Research Laboratory, Wright-Patterson Air Force Base, OH, USA;3. UES, Inc., Dayton, OH, USA |
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| Abstract: | A new class of high‐temperature dipolar polymers based on sulfonylated poly(2,6‐dimethyl‐1,4‐phenylene oxide) (SO2‐PPO) was synthesized by post‐polymer functionalization. Owing to the efficient rotation of highly polar methylsulfonyl side groups below the glass transition temperature (Tg≈220 °C), the dipolar polarization of these SO2‐PPOs was enhanced, and thus the dielectric constant was high. Consequently, the discharge energy density reached up to 22 J cm?3. Owing to its high Tg , the SO2‐PPO25 sample also exhibited a low dielectric loss. For example, the dissipation factor (tan δ) was 0.003, and the discharge efficiency at 800 MV m?1 was 92 %. Therefore, these dipolar glass polymers are promising for high‐temperature, high‐energy‐density, and low‐loss electrical energy storage applications. |
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| Keywords: | dielectric constant dipolar glass polymers electrical energy storage orientational polarization polymers |
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