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Monitoring the Polymerization of Two-Component Epoxy Adhesives Using a Terahertz Time Domain Reflection System

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Abstract

We report nondestructive measurements of the properties of two-component epoxy adhesives at THz wavelengths using a reflective time-domain spectroscopy system. We describe a simple method to determine the refractive index, layer thickness, and absorption coefficient using time-domain data applying a Fresnel-equation based approach. The results indicate that the adhesive’s curing process may be monitored using a simple parameter extraction technique based on time-domain measurements for systems featuring small bandwidth, showing good agreement with data obtained with from transmission measurements.

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Authors and Affiliations

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

    T. Probst, S. Sommer, A. Soltani & M. Koch

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

    E. Kraus & B. Baudrit

  3. Department of Engineering, Macquarie University, North Ryde 2109, Sydney, Australia

    G.E. Town

Authors
  1. T. Probst
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  2. S. Sommer
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  3. A. Soltani
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  4. E. Kraus
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  5. B. Baudrit
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  6. G.E. Town
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  7. M. Koch
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Correspondence to T. Probst.

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Probst, T., Sommer, S., Soltani, A. et al. Monitoring the Polymerization of Two-Component Epoxy Adhesives Using a Terahertz Time Domain Reflection System. J Infrared Milli Terahz Waves 36, 569–577 (2015). https://doi.org/10.1007/s10762-015-0155-7

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  • DOI: https://doi.org/10.1007/s10762-015-0155-7

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