Dipole Glass Polymer with High Dielectric Constant Based on Side Chain Functionalized Poly(ether ether ketone)

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2025-02-27 DOI:10.1021/acsapm.4c0362110.1021/acsapm.4c03621

Xuexia Li, Thumawadee Wongwirat, Linqi Li, Yuan Xi, Junji Wei* and Lei Zhu,

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Abstract

A new dipolar glass polymer, sulfonylated poly(ether ether ketone) (PPLM–PEEK-SO₂), was designed and synthesized using the postfunctionalization of o-cresolphthalein units. The methyl sulfonyl group, as a side chain with a large dipole moment of 4.25 D, could well utilize the free volume (FV) provided by the rigid skeleton structure. This enhanced orientational polarization resulted in a high dielectric constant of 4.55 and a low loss of 0.0057 at 25 °C and 100 Hz for PPLM–PEEK-SO₂. In addition, PPLM–PEEK exhibited excellent discharge energy density, and the discharge efficiency (η) maintained about 97% at room temperature when the electric field increased from 50 to 500 MV/m. And even at 150 °C and 300 MV/m, it can also be as high as 95.42%, which is suitable for high-temperature energy storage. Moreover, PPLM–PEEK-SO₂ exhibited a higher energy storage density, such as 3.8 J/cm³ at 100 °C and 450 MV/m.

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.