Sensing Water Absorption in Hygrothermally Aged Epoxies with Terahertz Time-Domain Spectroscopy

Lin, Hungyen, Benjamin P. Russell, Prince Bawuah, and J. Axel Zeitler. “Sensing water absorption in hygrothermally aged epoxies with terahertz time-domain spectroscopy.” Analytical Chemistry 93, no. 4 (2021): 2449-2455.

Abstract

In the field of non-destructive testing, terahertz sensing has been used to analyze a wide range of materials where the most successful applications have involved materials that are semi-transparent to terahertz radiation. In this work, we demonstrate the sensitivity of terahertz time-domain spectroscopy to quantify water absorption in hygrothermally aged simple and commercial epoxy systems supported by conventional gravimetric analysis.

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