期刊
COMPOSITES PART B-ENGINEERING
卷 58, 期 -, 页码 66-75出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.10.053
关键词
Polymer-matrix composites (PMCs); Thermosetting resin; Electrical properties; Interface
资金
- Natural Science Foundation of China [51173123]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Major Program of Natural Science Fundamental Research Project of Jiangsu Colleges and Universities [11KJA430001]
- Suzhou Applied Basic Research Program [SYG201141]
- Scientific Innovation Research of College Graduate in Jiangsu Province [CXZZ12_0814]
New composites with high dielectric constant and low dielectric loss, based on expanded graphite (EG), CaCuTi4O12 (sCCTO) and cyanate ester (CE) resin, were developed by controlling the interaction between EG and sCCTO. Difference from EG, surface modified EG (mEG) has an additional strong chemical interaction with sCCTO, this not only improves the dispersion of fillers, but also enhances the filler-matrix interfacial adhesion, leading to different micro-structures and dielectric properties. Specifically, the percolation thresholds of mEG/sCCTO/CE and EG/sCCTO/CE composites are 3.45 vol% and 2.86 vol%, respectively. When the loading of conductors approaches the percolation threshold, mEG/sCCTO/CE composite has much higher dielectric constant and lower dielectric loss than EG/sCCTO/CE composite. The nature behind these attractive data was revealed by building an equivalent circuit. (C) 2013 Elsevier Ltd. All rights reserved.
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