Sensing water absorption in hygrothermally aged epoxies with terahertz time-domain spectroscopy

Lin, Hungyen and Russell, Benjamin and Bawuah, Prince and Zeitler, J Axel (2021) Sensing water absorption in hygrothermally aged epoxies with terahertz time-domain spectroscopy. Analytical Chemistry, 93 (4). pp. 2449-2455. ISSN 0003-2700

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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.