Abstract

A method for real-time determination of the percent cure of epoxies via in situ fiber-optic Raman spectroscopy has been developed. This method utilizes a probe design developed for real-time monitoring of polymer curing and multivariate analysis to interpret the data and determine percent cure. This method was demonstrated to be reliable to +/-0.54% of cure in laboratory samples over a 50-99% cure range. A preliminary study measuring cure percentage in an industrial, glass-reinforced composite has been shown to be reliable to +/-0.82% in the 40-90% cure range.

Fiber-optic epoxy composite cure sensor. II. Performance characteristics

Kai-Yuen Lam and Martin A. Afromowitz
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Michael Schwerdtfeger, Sina Lippert, Martin Koch, Andreas Berg, Stefan Katletz, and Karin Wiesauer
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Andrea Cusano, Vincenzo Buonocore, Giovanni Breglio, Antonio Calabrò, Michele Giordano, Antonello Cutolo, and Luigi Nicolais
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Fiber-optic epoxy composite cure sensor. I. Dependence of refractive index of an autocatalytic reaction epoxy system at 850 nm on temperature and extent of cure

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Appl. Opt. 34(25) 5635-5638 (1995)

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Denghui Yan, Changchun Xiong, Qingshan Zhong, Yudong Yao, Shuo Chen, Xi Mei, and Shanshan Zhu
Biomed. Opt. Express 14(6) 2920-2933 (2023)