Title: Evaluating Epoxy Cure through Single-Sided NMR Measurements of Molecular Mobility

Authors: Tyler Meldrum, Elliot Kim, Kayla Copeman, Kristina Keating, Nastaran Abdol, Parviz Soroushian, Anagi Balachandra

DOI: 10.33599/nasampe/s.21.0576

Abstract: We present the use of single-sided nuclear magnetic resonance (NMR) to monitor the cure of epoxy resins. While current methods to evaluate the cure of epoxies, including calorimetry (DSC) and infrared spectroscopy (FTIR), require either destructive sampling or the creation of model samples that correlate to materials used in final products, single-sided NMR offers a non-destructive alternative to monitor cure in situ. Here, we demonstrate in-situ NMR measurements of room-temperature curing of epoxy and interpret these results in context of a reduction of molecular mobility during the curing process. We correlate the NMR relaxation properties of that signal with DSC data. Our results show how NMR supports other data on curing, the extent of cure, and adhesion strength of epoxies.

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Conference: SAMPE NEXUS 2021

Publication Date: 2021/06/29

SKU: TP21-0000000576

Pages: 9

Price: FREE