Polyarylene Ether Nitrile and Titanium Dioxide Hybrids as Thermal Resistant Dielectrics
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ARTICLE
POLYMER SCIENCE
https://doi.org/10.1007/s10118-020-2481-z Chinese J. Polym. Sci.
Polyarylene Ether Nitrile and Titanium Dioxide Hybrids as Thermal Resistant Dielectrics Ren-Bo Weia,b†*, Chen-Hao Zhana†, Yang Yanga, Peng-Lin Hea, and Xiao-Bo Liua* a Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054,
China b School of Chemical Engineering, Northwest University, Xi’an 710069, China
Electronic Supplementary Information Abstract With the expanding application of capacitors, thermal resistant dielectric materials are in high demand due to the increasing harsh environments where the capacitors are needed and the heat generated by the capacitors. Herein, we present polyarylene ether nitrile and titanium dioxide hybrids which can be used as thermal resistant dielectrics for these capacitors. Phthalonitrile modified titanium dioxide (TiO2CN) and phthalonitrile end-capped polyarylene ether nitrile (PEN-Ph) are firstly prepared. After being cast into TiO2-CN/PEN nanocomposite films, these composites self-crosslink upon heating at 320 °C for 4 h, forming the polyarylene ether nitrile and titanium dioxide hybrids (TiO2-PEN). Improved dielectric constants which are stable from room temperature to 200 °C of these hybrids are observed, indicating the potential application of the hybrids as thermal resistant dielectrics. Keywords Hybrid; TiO2; Polyarylene ether nitrile; Thermal resistance; Dielectric properties Citation: Wei, R. B.; Zhan, C. H.; Yang, Y.; He, P. L.; Liu, X. B. Polyarylene ether nitrile and titanium dioxide hybrids as thermal resistant dielectrics. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-020-2481-z
INTRODUCTION With the rapid development of electronic industry, high quality capacitor plays an increasingly important role due to its application in tuning, bypass, filtering and other circuits.[1−4] Thereby, dielectric material which is the vital part of the capacitors has attracted more and more attention.[2,5] Traditional ceramic dielectric materials possess relatively high dielectric constant, but they also demonstrate shortages of low breakdown strength, high processing temperature and brittleness.[6,7] In comparison, polymeric dielectrics have advantages of light weight, convenient processing and high breakdown strength, among others.[8,9] Many polymers, including polyethylene,[10] poly(vinylidene fluoride),[11] polystyrene[12] and polycarbonate[13] have been widely used as dielectrics for polymeric capacitors. However, for most polymers, their dielectric constant is relatively low. What is more, the low glass transition temperature (Tg) of polymers limits their using as high temperature dielectric materials. As a result, the further application of the polymeric dielectrics at high temperatures is still limited.[14,15] With the development of society, more and more high
* Corresponding authors, E-mail: [email protected] (R.B.W.) E-mail: [email protected] (X.B.L) † Th
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