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Fourier Transform Near-Infrared Monitoring of Reacting Resins Using an Evanescent Wave High-Index Fiber-Optic Sensor

Published

Author(s)

Joy P. Dunkers, Kathleen M. Flynn, Mitchell Huang, Kimberly A. McDonough

Abstract

In this work, a high-index silica-b ased ® ber-optic mini-bundle sensor was constructed and implemented with a Fourier transform near-infrared spectrometer in the spectral region from 10 000 to 4500 cm2. The refractive index of the multimode step index ® ber was 1.618. This arrangement allows the propagation of waveguiding modes when the sensor is immersed in most resin systems. The reactions of a polyisocyanurate resin system and an epoxy resinsystem were monitored and peak assignments were made and discussed with respect to their potential for use in real-time analysis to be applied to cure control. Last, cure monitoring with this sensor was successfully demonstrated in a glass-reinforced resin transfer molded epoxy part.
Citation
Applied Spectroscopy

Keywords

Near infrared, Fiber optics, Composite, Cure, Epoxy, Polyisocyanurate

Citation

Dunkers, J. , Flynn, K. , Huang, M. and McDonough, K. (1997), Fourier Transform Near-Infrared Monitoring of Reacting Resins Using an Evanescent Wave High-Index Fiber-Optic Sensor, Applied Spectroscopy, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=854030 (Accessed April 24, 2024)
Created November 4, 1997, Updated February 19, 2017