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Layered Composites for High Tan Delta Plateau over Wide Temperature Range.

Taoxi Wang1, Hongmei Chen2, Wei Jun Liang3

  • 1State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China.

Polymers
|January 8, 2025
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Summary

This study introduces a novel layered composite design to achieve a broad temperature plateau for Tan Delta (TDP), enhancing material damping properties for engineering applications with fluctuating temperatures.

Keywords:
Tan Delta plateauelastic layerphase transitionstorage modulus

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Area of Science:

  • Materials Science
  • Polymer Science
  • Composite Materials

Background:

  • Tan Delta quantifies viscoelastic behavior, crucial for damping properties, often linked to material transitions like glass transition or melting.
  • Achieving a high Tan Delta over a wide temperature range is difficult, limiting polymer applications in environments with significant temperature fluctuations.

Purpose of the Study:

  • To present a straightforward method for creating materials with a broad Tan Delta plateau (TDP) across a wide temperature range.
  • To investigate the effectiveness of a layered composite architecture for enhancing damping properties.

Main Methods:

  • Fabrication of a three-layer composite structure with a polymer core sandwiched between two highly stretchable elastic fabrics.
  • Systematic investigation of the Tan Delta behavior of these layered composites across varying temperatures.
  • Analysis of the influence of structural parameters, including the number of layers and elastic fabric stretchability.

Main Results:

  • All prepared three-layer composite samples consistently exhibited a wide Tan Delta plateau (TDP).
  • The layered composite architecture effectively broadened the temperature range of high Tan Delta values.
  • The TDP was shown to be tailorable by adjusting the number of layers and the stretchability of the elastic fabrics.

Conclusions:

  • A simple layered composite design provides an effective strategy to achieve a broad Tan Delta plateau (TDP).
  • This approach offers a viable solution for developing advanced damping materials for engineering applications subjected to wide temperature variations.
  • The tunability of the TDP through structural modifications highlights the potential for customized material design.