Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 132, Issue 40, Pages -Publisher
WILEY-BLACKWELL
DOI: 10.1002/app.42642
Keywords
composites; dielectric properties; nanostructured polymers; polyamides
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Funding
- National Natural Science Foundation of China [51103087, 51421061]
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Composites with multi-walled carbon nanotubes (MWNTs) involved in polyamide 11 (PA11) were prepared via a conventional melt blending method. The structure, morphology, crystallization behavior, electrical, and dielectric properties of composites were investigated. The results demonstrated that the dispersed uniformly MWNTs favored the formation of crystal of PA11 when the composites were quenched from melt. The dielectric constant of composites was dependent on the electric field frequency and MWNTs content, and the highest value of dielectric constant was as high as 350 for the composite with 1.21 vol % MWNTs at 10(3) Hz, accompanied by a low dielectric loss. The enhanced dielectric properties could be interpreted by the formation of abundant nanocapacitors within the composites and the interfacial polarization effect resulting from accumulation of charge carriers at the internal interfaces between MWNTs and PA11. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42642.
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