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Thermally conducting hybrid polycarbonate composites with enhanced electromagnetic shielding efficiency

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Abstract

The recent work evaluates the effect of ethylene methacrylate (EMA) as an impact modifier and the hybrid filler constitutes graphite flakes (GF), multiwalled carbon nanotubes (MWCNT), and steel fibers (SF) for the development of polycarbonate (PC) based conducting composite with high thermal conductivity and EMI shielding. The samples were initially optimized based on their mechanical properties, which were further characterized by thermal conductivity (TC) and electromagnetic interference shielding effectiveness (EMI SE). The thermal conductivity of the polycarbonate (PC) nanocomposites was found to increase by ~ 451% and ~ 602% at a significantly higher filler loading of 20 wt% and 30 wt% respectively without any processing difficulties. Further, the EMI SE values of the same have been enhanced in the range of -40.2 dB and -46.4 dB respectively, which falls within the range of commercially acceptable limits. Nonetheless, the results were indicative of the creation of a conductive network through the matrix, the electron microscopic and diffractometric studies confirmed the optimum dispersion of the hybrid filler system within the PC matrix.

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Authors and Affiliations

  1. Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Petrochemicals Engineering and Technology (CIPET), B-25, CNI Complex, Patia, Odisha, 751024, Bhubaneswar, India

    Subhransu S. Pradhan, Lakshmi Unnikrishnan, Smita Mohanty, Manoranjan Biswal & Sanjay K. Nayak

  2. Advanced Polymer Design & Development Research Laboratory (APDDRL), Central Institute of Petrochemicals Engineering & Technology (CIPET), Hi-Tech Defence and Aerospace Park (IT Sector), Jala Hobli, Karnataka, 562149, Bengaluru, India

    Lakshmi Unnikrishnan

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  1. Subhransu S. Pradhan
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  3. Smita Mohanty
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Correspondence to Subhransu S. Pradhan.

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The study was funded by Bharat Electronics Limited, Panchkula Sanction Order No. BEPO/P10/4900251648. The authors declare that they have no conflict of intrest.

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Pradhan, S.S., Unnikrishnan, L., Mohanty, S. et al. Thermally conducting hybrid polycarbonate composites with enhanced electromagnetic shielding efficiency. J Polym Res 28, 463 (2021). https://doi.org/10.1007/s10965-021-02823-4

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