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Optical and temperature dependent electrical properties of poly (vinyl chloride)/copper alumina nanocomposites for optoelectronic devices

  • S. Suvarna , Annumaria Sebastian , Furhan and Manammel Thankappan Ramesan EMAIL logo
Published/Copyright: December 26, 2022
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International Polymer Processing
From the journal International Polymer Processing Volume 38 Issue 2

Abstract

The practical applications of poly (vinyl chloride) have been constrained due to its poor thermal stability, low dielectric constant and inability to shield against ultraviolet (UV) radiation. In this study, we tried to improve the optical properties, thermal stability, temperature-dependent electrical conductivity and dielectric constant using copper alumina (Cu–Al2O3) nanoparticles reinforced poly (vinyl chloride) (PVC). Optical absorption measured with an ultraviolet-visible (UV-visible) spectrometer emphasises the blueshift in absorption edges and decreasing bandgap energies of PVC/Cu–Al2O3 nanocomposites compared to PVC. The presence of Cu–Al2O3 in PVC and its interaction with the polymer were confirmed by FTIR spectroscopy. Thermogravimetric analysis (TGA) demonstrates that nanocomposites have higher thermal stability than PVC, and that thermal stability increases with filler loading. Scanning electron microscopy (SEM) indicates the homogeneous dispersion of nanosized Cu–Al2O3 in the polymer matrix. The activation energy determined by the Arrhenius equation revealed that AC conductivity increases with the addition of nanoparticles up to a specific loading. The dielectric constant increases as a function of temperature and decreases with frequency. The magnitude of AC conductivity and dielectric constant were highest for 7 wt% loaded nanocomposites. The dielectric constant predicted by the Bruggeman and Maxwell-Garnet models were in good agreement with the experimental permittivity. The semiconducting nature of nanocomposites was investigated by impedance analysis. The semi-circular nature of Cole-Cole plots manifests the combination of parallel capacitance with low bulk resistance. The enhanced optical, thermal, electrical and dielectric properties of PVC/Cu–Al2O3 nanocomposites can be utilized in fabricating optoelectronic devices with excellent charge-storing ability.

Keywords: copper alumina; dielectric parameters; modelling; nanocomposites; optical properties; poly(vinyl chloride); temperature-dependent conductivity; thermal stability
Corresponding author: Manammel Thankappan Ramesan, Department of Chemistry, Centre for Polymer Science and Technology, University of Calicut, Calicut University P.O., Kerala, Malappuram, 673 635 India, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors of this article have no conflict of interest to declare.

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Received: 2022-08-17
Accepted: 2022-12-03
Published Online: 2022-12-26
Published in Print: 2023-05-25

© 2022 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/ipp-2022-4270
Keywords for this article
copper alumina; dielectric parameters; modelling; nanocomposites; optical properties; poly(vinyl chloride); temperature-dependent conductivity; thermal stability

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. Influence of process parameters of a continuous final mixer on the properties of carbon black/rubber composites
  4. Time series data for process monitoring in injection molding: a quantitative study of the benefits of a high sampling rate
  5. Vibration damping properties of graphene nanoplatelets filled glass/carbon fiber hybrid composites
  6. Optical and temperature dependent electrical properties of poly (vinyl chloride)/copper alumina nanocomposites for optoelectronic devices
  7. Numerical visualization of extensional flows in injection molding of polymer melts
  8. Thermal, mechanical and dielectric properties of glass fiber reinforced epoxy-lanthanum manganite nanocomposites
  9. Statistical research on the mixing properties of wave based screws by numerical simulations
  10. Influence of mold cavity thickness on electrical, morphological and thermal properties of polypropylene/carbon micromoldings
  11. Development of a prototype for the rubber latex industry to detect dry rubber content of fresh natural rubber latex using a novel measurement system with proton-electron transfer
  12. Effect of molding history on molecular orientation relaxation during physical aging of polystyrene injection moldings
  13. A comparative analysis of the effect of post production treatments and layer thickness on tensile and impact properties of additively manufactured polymers
  14. Fabrication of flame-retardant and smoke-suppressant rigid polyurethane foam modified by hydrolyzed keratin
  15. Study on flame retardancy and thermal stability of rigid polyurethane foams modified by amino trimethylphosphonate cobalt and expandable graphite
  16. Three-dimensional simulation of capillary rheometry for an estimation of extensional viscosity
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