Layered Composites for High Tan Delta Plateau over Wide Temperature Range

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.