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An Effective EMI Shielding Material Based on Poly (trimethylene terephthalate) Blend Nanocomposites with Multiwalled Carbon Nanotubes

Abstract

Abstract: The effect of blend ratio and MWCNTs loading on morphology, electrical properties and electromagnetic shielding performance of poly (trimethylene terephthalate) (PTT)/ polypropylene (PP) blend nanocomposites were studied. To understate the state of dispersion of MWCNTs, PTT/PP blend nanocomposites were systematically analyzed by scanning electron microscope and high resolution transmission electron microscope. Fourier transform spectroscopy (FT-IR) and Raman spectroscopy techniques were used to understand the chemical interactions between the blend components and fillers. Among the nanocomposites of all blend composition with 1wt % MWCNTs, composites with high wt % PTT (90PTT/10PP/1MWCNT) showed better electrical properties due to the double percolation phenomenon. The shielding effectiveness (SE) was investigated in the S-band frequency range and 90PTT/10PP/1MWCNT showed very good shielding effectiveness for electromagnetic radiation. Further studies with different MWCNTs loading show that 90PTT/10PP blend with 5 wt% MWCNTs, indicated high dielectric properties and a maximum SE of ~40dB. The conductivity results were linearly fitted by power law and the obtained percolation threshold was found around 0.5 wt % MWCNT. Theoretical models were also applied for DC conductivity data to explain conductive mechanism in the polymer blend nanocomposites.

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Publication details

The article was received on 16 May 2018, accepted on 03 Jul 2018 and first published on 04 Jul 2018


Article type: Paper
DOI: 10.1039/C8NJ02410C
Citation: New J. Chem., 2018, Accepted Manuscript
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    An Effective EMI Shielding Material Based on Poly (trimethylene terephthalate) Blend Nanocomposites with Multiwalled Carbon Nanotubes

    A. A R, M. Arif P, A. M K, L. M. P, G. V. G, N. Kalarikkal, S. Thomas and T. G. Volova, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ02410C

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