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Cure monitoring of two-component epoxy adhesives by terahertz time-domain spectroscopy

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Abstract

We report nondestructive measurements of the properties of two-component epoxy adhesives at terahertz wavelengths using a transmissive time-domain spectroscopy system. The results show that the different epoxies have measurably different THz properties, that the changes which occur during the curing process can be monitored by measurements of their refractive index and absorption at terahertz wavelengths, and that this technique is sensitive enough to record changes in the optical material parameters during the postcuring process.

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Authors and Affiliations

  1. Department of Physics and Materials Sciences Center, Philipps-Universität Marburg, Renthof 5, Marburg, 35032, Germany

    Stefan Sommer & Thorsten Probst

  2. SKZ—German Plastics Center, SKZ-KFE gGmbH, Friedrich-Bergius-Ring 22, Wuerzburg, 97076, Germany

    Eduard Kraus & Benjamin Baudrit

  3. Department of Engineering, Macquarie University, Sydney, NSW, 2109, Australia

    Graham E. Town & Martin Koch

Authors
  1. Stefan Sommer
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  2. Thorsten Probst
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  3. Eduard Kraus
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  4. Benjamin Baudrit
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  5. Graham E. Town
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  6. Martin Koch
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Correspondence to Stefan Sommer.

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Sommer, S., Probst, T., Kraus, E. et al. Cure monitoring of two-component epoxy adhesives by terahertz time-domain spectroscopy. Polym. Sci. Ser. B 58, 769–776 (2016). https://doi.org/10.1134/S1560090416060154

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  • DOI: https://doi.org/10.1134/S1560090416060154

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