In Situ Monitoring of the Curing of a Bisphenol-A Epoxy Resin by Raman-Spectroscopy and Rheology

Abstract:

In this study the curing of an epoxy resin consisted of a diglycidyl ether of bisphenolA (DGEBA) resin and an aromatic Polyamine hardener was monitored combining a Raman-spectrometer and shear rheometry (Rheo-Raman). The set-up allow to carry out curing experiments at various temperatures (100, 120, 140 and 160 °C) where rheological measurements were performed using an oscillation rheometer and a plate-plate geometry while simultaneously Raman spectra were recorded. Raman-spectroscopy allows the determination of the reaction turnover and therefore the degree of cross-linking. Combined with the rheological data obtained, e.g. the gel point and the vitrification point, one can get a better insight in the processes occurring and the influence of different measurement parameters on the obtained rheological properties. Thus, the reaction turnover has been investigated at significant stages of the curing process.

• Periodical: Materials Science Forum (Volume 955)
• Pages: 92-97
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.955.92
• Online since: May 2019
• Authors: Moritz Elias Strobel, Milan Kracalik, Sabine Hild*
• Keywords: Curing Kinetics, Epoxy Resin, Raman, Rheology

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