Model-Based Dielectric Constant Estimation of Polymeric Nanocomposite

Polymers

Xue Liu¹  Le Zhou²  Yuqi Chen³  Jiang Shao⁴  Mingbo Ji⁵ 

[1] Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China;Research Department, Changzhou Betterial Film Technologies Co., Ltd., Changzhou 213000, China;School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA 19104, USA;The School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China;Yantai Graduate School, Harbin Engineering University, Yantai 264000, China;

关键词: modeling;    interphase;    dielectric constant;    nanocomposite;    polymer;   

DOI  :  10.3390/polym14061121

来源: DOAJ

【 摘 要 】

The interphase region widely exists in polymer-based nanocomposites, which affects the dielectric properties of the nanocomposites. General models, such as the Knott model, are often used to predict the dielectric constant of nanocomposites, while the model does not take the existence of interphase into account, which leads to a large deviation between the predicted results and the experimental values. In this study, a developed Knott model is proposed by introducing the interphase region and appropriately assuming the properties of the interphase. The modeling results based on the developed model are in good agreement with the experimental data, which verifies the high accuracy of the development model. The influence of nanoparticle loading on the effective volume fraction is further studied. In addition, the effects of the polymer matrix, nanoparticles, interphase dielectric and thickness, nanoparticle size and volume fraction on the dielectric properties of the nanocomposites are also investigated. The results show that polymer matrix or nanoparticles with a high dielectric and thick interphase can effectively improve the dielectric properties of the materials. Small size nanoparticles with high concentrations are more conducive to improving the dielectric properties of the nanocomposites. This study demonstrates that the interphase properties have an important impact on the dielectric properties of nanocomposites, and the developed model is helpful to accurately predict the dielectric constant of polymer-based nanocomposites.

【 授权许可】

Unknown