Enhanced dielectric properties of polyamide 11/multi‐walled carbon nanotubes composites |
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| Authors: | Yongzhong Huang Lirong Tan Shaodi Zheng Zhengying Liu Jianming Feng Ming‐Bo Yang |
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| Affiliation: | 1. College of Polymer Science and Engineering, Sichuan University, Chengdu, People's Republic of China;2. State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, People's Republic of China |
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| Abstract: | 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 α 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 103 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. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42642. |
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| Keywords: | composites dielectric properties nanostructured polymers polyamides |
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