High Dielectric Constant Sulfonyl-Containing Dipolar Glass Polymers with Enhanced Orientational Polarization
High Dielectric Constant Sulfonyl-Containing Dipolar Glass Polymers with Enhanced Orientational Polarization
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DOI：
10.1021/acs.macromol.8b00923
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发表时间：
2018-08
期刊：
影响因子：
5.5
通讯作者：
Yufeng Zhu;Zhongbo Zhang;M. Litt;Lei Zhu
中科院分区：
文献类型：
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作者：
Yufeng Zhu;Zhongbo Zhang;M. Litt;Lei Zhu
偶极玻璃（DG）聚合物利用亚Tg取向极化（Tg是玻璃化转变温度）来增强介电常数，是用于先进电子和功率应用的有希望的候选者，因为空间电荷（电子和杂质离子）的传导在玻璃态下被抑制，并且因此介电损耗低。在这项研究中，我们研究了偶极密度和偶极排列在含磺酰基的侧链DG聚合物的介电性能的介电常数，能量密度和介电损耗方面的影响。单磺酰基（即，CH 3SO 2-）和二磺酰基[即，[CH_3SO_2（CH_2）_3SO_2-]基团分别定量接枝到聚环氧氯丙烷（单取代）和聚（3，3-双（氯甲基）氧杂环丁烷）（双取代）上，以改变侧链中的偶极密度和偶极排列。由于高极性磺酰基（4.5D）的取向极化作用，这些DG聚合物表现出高的表观分散性.
Dipolar glass (DG) polymers, which utilize sub-Tg orientational polarization (Tg is the glass transition temperature) to enhance dielectric constants, are promising candidates for use in advanced electronic and power applications because conduction of space charges (electrons and impurity ions) is suppressed in the glassy state, and thus, the dielectric loss is low. In this study, we studied the effects of dipole density and dipole arrangement in sulfonyl-containing side-chain DG polymers on their dielectric performance in terms of dielectric constant, energy density, and dielectric loss. Monosulfonyl (i.e., CH3SO2-) and disulfonyl [i.e., CH3SO2(CH2)3SO2-] groups were quantitatively grafted to polyepichlorohydrin (monosubstitution) and poly(3,3-bis(chloromethyl)oxatane) (bis-substitution), respectively, in order to vary the dipole density and dipole arrangement in the side chains. As a result of orientation polarization from highly polar sulfonyl (4.5 D) groups, these DG polymers exhibited high apparent d...