Hybrid composites of ABS with carbonaceous fillers for electromagnetic shielding applications |
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| Authors: | Débora P Schmitz Tamara I Silva Sílvia D A S Ramoa Guilherme M O Barra Alessandro Pegoretti Bluma G Soares |
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| Affiliation: | 1. Departamento de Engenharia Mecanica, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil;2. Departamento de Engenharia Metalúrgica e de Materiais, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil;3. Department of Industrial Engineering and INSTM Research Unit, University of Trento, Trento, Italy |
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| Abstract: | This work evaluates the influence of two types of carbonaceous fillers, carbon black (CB) and carbon nanotubes (CNTs), on the electrical, electromagnetic, and rheological properties of composites based on poly(acrylonitrile‐co‐butadiene‐co‐styrene) (ABS) prepared by the melt mixing. Electrical conductivity, electromagnetic shielding efficiency (EMI SE) in the X‐band frequency range (8–12.4 GHz), and melt flow index (MFI) results showed that ABS/CNT composites exhibit higher electrical conductivity and EMI SE, but lower MFI when compared to ABS/CB composites. The electrical conductivity of the binary composites showed an increase of around 16 orders of magnitude, when compared to neat ABS, for both fillers. Binary composites with 5 and 15 wt % of filler showed an EMI SE of, respectively, ?44 and ?83 dB for ABS/CNT, and ?9 and ?34 dB for ABS/CB. MFI for binary composites with 5 wt % were 15.45 and 0.55 g/10 min for CB and CNT, respectively. Hybrid composites ABS/CNT.CB with 3 wt % total filler and fraction 50:50 and 75:25 showed good correlation between EMI SE and MFI. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46546. |
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| Keywords: | dielectric properties structure– property relationships thermoplastics |
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