期刊
POLYMERS FOR ADVANCED TECHNOLOGIES
卷 25, 期 12, 页码 1616-1621出版社
WILEY
DOI: 10.1002/pat.3412
关键词
polymer matrix composites; dielectric properties; mechanical properties; thermal properties; reflection loss
资金
- National Natural Science Foundation of China (NNSFC) [51072165]
- State Key Laboratory of Solidification Processing in NWPU of China
A kind of absorbing materials was prepared by hot pressing method using polyimide as matrix and carbon black (CB) as filler. The mechanical properties, the electromagnetic properties, and the thermal stability of polyimide/CB composites were studied. The results showed that the complex permittivity increased from 6.82 + 1.38i to 18.69 + 9.47i, whereas the flexural strength decreased from 108 MPa to 77 MPa, respectively, when the CB content increased from 2 wt% to 8 wt%. The reflection loss curves shifted to low frequency with increase of the thickness at the same content. The reflection loss below -10 dB could be obtained in the X band with 6 wt% CB content and did not display significant difference before and after the heat treatment at 400 degrees C for 5 h. When the content of CB was 8 wt%, the decomposition temperature (at 5% weight loss) increased approximately 42 degrees C compared with pure polyimide matrix. Copyright (c) 2014 John Wiley & Sons, Ltd.
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