Dielectric Properties of Metathesis and Vinyl-addition 5-Cyclohexyl-2-norbornene Polymers

被引：0
|
作者：
Zotkin, M. A. [1 ]
Wozniak, A. I. [1 ]
Alentiev, D. A. [1 ]
Lunev, I. V. [2 ]
Galiullin, A. A. [2 ]
Bermeshev, M. V. [1 ]
机构：
[1] Russian Acad Sci, Topchiev Inst Petrochem Synth, Moscow 119991, Russia
[2] Kazan Fed Univ, Inst Phys, Kazan 420008, Tatarstan, Russia
来源：
RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 2023年 / 96卷 / 07期
关键词：
low dielectric constant polymers; vinyl-addition polymers; 5-cyclohexyl-2-norbornene; metathesis polymers; polynorbornene; dielectric properties; dielectric constant; GAS PERMEATION PROPERTIES; TRANSPORT PROPERTIES;
D O I：
10.1134/S1070427223070030
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Dielectric properties of isomeric glassy 5-cyclohexyl-2-norbornene polymers synthesized by the metathesis and vinyl-addition schemes were studied in a wide range of electric field frequencies (0.1-1 x 10(6) Hz) and temperatures (from -100 to +200 degrees C). These polymers have close values of the dielectric constant (2.28-2.29 at the electric field frequency of 1 MHz and 25 degrees C) and low values of dielectric loss caused by dipole-segmental loss. Analysis of the imaginary part of the dielectric spectrum shows that the vinyl-addition polymer is characterized by a single relaxation process and the metathesis polymer, by three processes associated with cooperative segmental motion of backbones, with changes in the conformation of the cyclohexyl substituent, and with local motion in monomeric units.
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收藏
页码：728 / 736
页数：9
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