High dielectric constant dipolar glass polymer based on sulfonylated poly(ether ether ketone)
High dielectric constant dipolar glass polymer based on sulfonylated poly(ether ether ketone)
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基于磺酰化聚醚醚酮的高介电常数偶极玻璃聚合物
DOI：
10.1016/j.polymer.2019.121688
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发表时间：
2019-09
期刊：
影响因子：
4.6
通讯作者：
Lei Zhu
中科院分区：
文献类型：
--
作者：
Junji Wei;Tianxiong Ju;Wen Huang;Jiale Song;Ni Yan;Fengyan Wang;Aiqin Shen;Zhenpeng Li;Lei Zhu
In this work, a new kind of dipolar glass polymer, containing strongly polar sulfonyl groups, was synthesized by post functionalization of the corresponding poly(ether ether ketone) containing carboxyl groups (PEEK-COOH). The sulfonylated PEEK (PEEK-SO2) exhibited strongβtransition at −100 °C and 1 Hz due to the large dipole moment (4.25 D) of the side-chain sulfonyl groups, which were attached to the backbone via flexible ester bonds. Because of this strongβdipole relaxation, the glassy PEEK-SO2exhibited a high dielectric constant of 5.0 at 25 °C and 1 Hz, nearly 32% higher than that of PEEK-COOH. From an electric displacement-electric field loop study, PEEK-SO2exhibited a relative high discharge energy density of 2.35 J/cm3at 300 MV/m and room temperature, which was 1.4 times that of PEEK-COOH. However, the hysteresis loss was only 0.008 at 100 Hz and 25 °C. This work further reveals that dipolar glass polymers with high mobile dipolar side groups are suitable for high energy density and low loss dielectric applications.
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影响因子：
2.8
作者：
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通讯作者：
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通讯作者：
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