Effect of nanoclay reinforcement on the X-band dielectric properties of epoxy resins for use in radome applications

Carla Garcia, Mauro Fittipaldi, Landon R Grace

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The suitability of nanoclay reinforcement for improvement of structural and electrical properties of thermosetting epoxy systems at 10 GHz is investigated via a resonant technique. The potential of nanoclay reinforcement to improve mechanical properties and mitigate moisture diffusion in polymer materials has been well-documented in recent years. Further, evidence has shown that the presence of moisture in polymer systems has a profoundly deleterious effect on relative permittivity and loss tangent of the material. This is particularly important for construction or coating of radar protecting structures (radome), in which low relative permittivity and loss tangent are critical to radar transparency. Therefore, the addition of nanoclay reinforcement to polymer composites used in radome applications may prove a viable method for dielectric and structural performance improvement and moisture absorption minimization. The relative permittivity and loss tangent of two epoxy resin systems are evaluated as a function of organoclay weight percentage using a split-post dielectric resonator operating at an X-band frequency. Nanoclay content up to 5% by weight is investigated for both systems. The addition of nanoclay did not have a significant effect on the relative permittivity of the material, contributing only up to a 1% decrease (improvement) compared to the neat epoxy. The material loss tangent, however, exhibited a consistent downward trend, with a nearly 13% decrease recorded for the nanoclay content of 5% by weight in the most extreme case. Based on these results, the addition of nanoclay to polymer composite materials used in radome applications has no detrimental effect on the dielectric properties of the material, and as such may prove to be a viable option for improving radome performance and longevity.

Original languageEnglish (US)
Title of host publicationProceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers
PublisherAmerican Institute of Physics Inc.
Volume1664
ISBN (Electronic)9780735413092
DOIs
StatePublished - May 22 2015
Event30th International Conference of the Polymer Processing Society, PPS 2014 - Cleveland, United States
Duration: Jun 6 2014Jun 12 2014

Other

Other30th International Conference of the Polymer Processing Society, PPS 2014
CountryUnited States
CityCleveland
Period6/6/146/12/14

Fingerprint

radomes
epoxy resins
reinforcement
superhigh frequencies
tangents
dielectric properties
moisture
permittivity
polymers
radar
composite materials
resonators
electrical properties
mechanical properties
trends
coatings
optimization

Keywords

  • Dielectric
  • Epoxy
  • Nanocomposites

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Garcia, C., Fittipaldi, M., & Grace, L. R. (2015). Effect of nanoclay reinforcement on the X-band dielectric properties of epoxy resins for use in radome applications. In Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers (Vol. 1664). [700151] American Institute of Physics Inc.. https://doi.org/10.1063/1.4918450

Effect of nanoclay reinforcement on the X-band dielectric properties of epoxy resins for use in radome applications. / Garcia, Carla; Fittipaldi, Mauro; Grace, Landon R.

Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers. Vol. 1664 American Institute of Physics Inc., 2015. 700151.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Garcia, C, Fittipaldi, M & Grace, LR 2015, Effect of nanoclay reinforcement on the X-band dielectric properties of epoxy resins for use in radome applications. in Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers. vol. 1664, 700151, American Institute of Physics Inc., 30th International Conference of the Polymer Processing Society, PPS 2014, Cleveland, United States, 6/6/14. https://doi.org/10.1063/1.4918450
Garcia C, Fittipaldi M, Grace LR. Effect of nanoclay reinforcement on the X-band dielectric properties of epoxy resins for use in radome applications. In Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers. Vol. 1664. American Institute of Physics Inc. 2015. 700151 https://doi.org/10.1063/1.4918450
Garcia, Carla ; Fittipaldi, Mauro ; Grace, Landon R. / Effect of nanoclay reinforcement on the X-band dielectric properties of epoxy resins for use in radome applications. Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers. Vol. 1664 American Institute of Physics Inc., 2015.
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abstract = "The suitability of nanoclay reinforcement for improvement of structural and electrical properties of thermosetting epoxy systems at 10 GHz is investigated via a resonant technique. The potential of nanoclay reinforcement to improve mechanical properties and mitigate moisture diffusion in polymer materials has been well-documented in recent years. Further, evidence has shown that the presence of moisture in polymer systems has a profoundly deleterious effect on relative permittivity and loss tangent of the material. This is particularly important for construction or coating of radar protecting structures (radome), in which low relative permittivity and loss tangent are critical to radar transparency. Therefore, the addition of nanoclay reinforcement to polymer composites used in radome applications may prove a viable method for dielectric and structural performance improvement and moisture absorption minimization. The relative permittivity and loss tangent of two epoxy resin systems are evaluated as a function of organoclay weight percentage using a split-post dielectric resonator operating at an X-band frequency. Nanoclay content up to 5{\%} by weight is investigated for both systems. The addition of nanoclay did not have a significant effect on the relative permittivity of the material, contributing only up to a 1{\%} decrease (improvement) compared to the neat epoxy. The material loss tangent, however, exhibited a consistent downward trend, with a nearly 13{\%} decrease recorded for the nanoclay content of 5{\%} by weight in the most extreme case. Based on these results, the addition of nanoclay to polymer composite materials used in radome applications has no detrimental effect on the dielectric properties of the material, and as such may prove to be a viable option for improving radome performance and longevity.",
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