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Study of Dielectric Behavior of Titanium Dioxide-Filled Polypropylene Composites

Received: 9 November 2018     Accepted: 30 November 2018     Published: 2 January 2019
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Abstract

Titanium dioxide (TiO2)-filled isotactic polypropylene (iPP) composites with various contents of TiO2 were prepared using an extrusion molding machine. Scanning electron micrograph shows that the surface of iPP is smoother in comparison to those of iPP/ TiO2 composites with varying TiO2 concentration. The composite of 40 wt% TiO2 contains more agglomerates or larger particles, than the composite of 20 wt% TiO2. With increasing filler content amount of voids and holes is increased on the composite surfaces. The DTA shows two endothermic peaks that represent melting temperatures at 169, 167, 163 and 167°C and thermal degradation temperatures at 435, 437, 448, 462°C of various TiO2 concentrations. While the melting peak of the neat iPP is sharp, the TiO2-loaded composites rather show diffuse melting peaks along with a shift of peaks towards lower temperatures. In AC electrical measurement it is demonstrated that with the increase of frequency, conductivity (σ) increases but dielectric constant (ɛ) decreases of these composites. With varying TiO2 concentration, there is no noticeable change observed in σ where as ɛ value is decrease of these composites. Both σ and ɛ are weakly dependent on temperature. At lower frequency region loss tangent (tanδ) increases with frequency and attains a maximum peak after that tanδ decreases rapidly at higher frequency region. This reverse and usual behavior of tanδ at high frequency can be explained in accordance with Koop’s theory.

Published in American Journal of Materials Synthesis and Processing (Volume 3, Issue 4)
DOI 10.11648/j.ajmsp.20180304.11
Page(s) 56-61
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Dielectric Behavior, Titanium Dioxide, Composite

References
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  • APA Style

    Rahima Nasrin, Sarmin Seema, Md. Abdul Gafur, Abu Hashan Bhuiyan. (2019). Study of Dielectric Behavior of Titanium Dioxide-Filled Polypropylene Composites. American Journal of Materials Synthesis and Processing, 3(4), 56-61. https://doi.org/10.11648/j.ajmsp.20180304.11

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    ACS Style

    Rahima Nasrin; Sarmin Seema; Md. Abdul Gafur; Abu Hashan Bhuiyan. Study of Dielectric Behavior of Titanium Dioxide-Filled Polypropylene Composites. Am. J. Mater. Synth. Process. 2019, 3(4), 56-61. doi: 10.11648/j.ajmsp.20180304.11

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    AMA Style

    Rahima Nasrin, Sarmin Seema, Md. Abdul Gafur, Abu Hashan Bhuiyan. Study of Dielectric Behavior of Titanium Dioxide-Filled Polypropylene Composites. Am J Mater Synth Process. 2019;3(4):56-61. doi: 10.11648/j.ajmsp.20180304.11

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  • @article{10.11648/j.ajmsp.20180304.11,
      author = {Rahima Nasrin and Sarmin Seema and Md. Abdul Gafur and Abu Hashan Bhuiyan},
      title = {Study of Dielectric Behavior of Titanium Dioxide-Filled Polypropylene Composites},
      journal = {American Journal of Materials Synthesis and Processing},
      volume = {3},
      number = {4},
      pages = {56-61},
      doi = {10.11648/j.ajmsp.20180304.11},
      url = {https://doi.org/10.11648/j.ajmsp.20180304.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmsp.20180304.11},
      abstract = {Titanium dioxide (TiO2)-filled isotactic polypropylene (iPP) composites with various contents of TiO2 were prepared using an extrusion molding machine. Scanning electron micrograph shows that the surface of iPP is smoother in comparison to those of iPP/ TiO2 composites with varying TiO2 concentration. The composite of 40 wt% TiO2 contains more agglomerates or larger particles, than the composite of 20 wt% TiO2. With increasing filler content amount of voids and holes is increased on the composite surfaces. The DTA shows two endothermic peaks that represent melting temperatures at 169, 167, 163 and 167°C and thermal degradation temperatures at 435, 437, 448, 462°C of various TiO2 concentrations. While the melting peak of the neat iPP is sharp, the TiO2-loaded composites rather show diffuse melting peaks along with a shift of peaks towards lower temperatures. In AC electrical measurement it is demonstrated that with the increase of frequency, conductivity (σ) increases but dielectric constant (ɛ′) decreases of these composites. With varying TiO2 concentration, there is no noticeable change observed in σ where as ɛ′ value is decrease of these composites. Both σ and ɛ′ are weakly dependent on temperature. At lower frequency region loss tangent (tanδ) increases with frequency and attains a maximum peak after that tanδ decreases rapidly at higher frequency region. This reverse and usual behavior of tanδ at high frequency can be explained in accordance with Koop’s theory.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Study of Dielectric Behavior of Titanium Dioxide-Filled Polypropylene Composites
    AU  - Rahima Nasrin
    AU  - Sarmin Seema
    AU  - Md. Abdul Gafur
    AU  - Abu Hashan Bhuiyan
    Y1  - 2019/01/02
    PY  - 2019
    N1  - https://doi.org/10.11648/j.ajmsp.20180304.11
    DO  - 10.11648/j.ajmsp.20180304.11
    T2  - American Journal of Materials Synthesis and Processing
    JF  - American Journal of Materials Synthesis and Processing
    JO  - American Journal of Materials Synthesis and Processing
    SP  - 56
    EP  - 61
    PB  - Science Publishing Group
    SN  - 2575-1530
    UR  - https://doi.org/10.11648/j.ajmsp.20180304.11
    AB  - Titanium dioxide (TiO2)-filled isotactic polypropylene (iPP) composites with various contents of TiO2 were prepared using an extrusion molding machine. Scanning electron micrograph shows that the surface of iPP is smoother in comparison to those of iPP/ TiO2 composites with varying TiO2 concentration. The composite of 40 wt% TiO2 contains more agglomerates or larger particles, than the composite of 20 wt% TiO2. With increasing filler content amount of voids and holes is increased on the composite surfaces. The DTA shows two endothermic peaks that represent melting temperatures at 169, 167, 163 and 167°C and thermal degradation temperatures at 435, 437, 448, 462°C of various TiO2 concentrations. While the melting peak of the neat iPP is sharp, the TiO2-loaded composites rather show diffuse melting peaks along with a shift of peaks towards lower temperatures. In AC electrical measurement it is demonstrated that with the increase of frequency, conductivity (σ) increases but dielectric constant (ɛ′) decreases of these composites. With varying TiO2 concentration, there is no noticeable change observed in σ where as ɛ′ value is decrease of these composites. Both σ and ɛ′ are weakly dependent on temperature. At lower frequency region loss tangent (tanδ) increases with frequency and attains a maximum peak after that tanδ decreases rapidly at higher frequency region. This reverse and usual behavior of tanδ at high frequency can be explained in accordance with Koop’s theory.
    VL  - 3
    IS  - 4
    ER  - 

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Author Information
  • Department of Physics, University of Barisal, Barisal, Bangladesh

  • Department of Physics, Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh

  • Pilot Plant & Process Development Centre, Bangladesh Council of Scientific & Industrial Research (BCSIR), Dhaka, Bangladesh

  • Department of Physics, Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh

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