Optical fiber sensor for an on-line monitoring of epoxy resin /amine reaction

An optical fiber sensor is described; it permits a rapid determination of the state of chemical reaction in epoxy resin diglycidyl ether of bisphenol A (DGEBA), and Triethylenetetramine stoichiometric reaction. Mid infrared Fourier transform technique was used to analyze the mixture via a pair of em...

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Bibliographic Details
Main Authors: Fouchal, F, Knight, J A G, Garrington, N, Cope, B
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:An optical fiber sensor is described; it permits a rapid determination of the state of chemical reaction in epoxy resin diglycidyl ether of bisphenol A (DGEBA), and Triethylenetetramine stoichiometric reaction. Mid infrared Fourier transform technique was used to analyze the mixture via a pair of embedded optical fibers connected to an FTIR spectrometer, which operates in the region 4000-700/cm of the electromagnetic waves. An accurate monitoring of the concentration changes over time of epoxy, amine, and hydroxyl groups gave a good estimate of extent of reaction and description of physical state of the produced matrix. The chemical group peaks 1130/cm and 3300-3400/cm were used to follow the disappearance of the epoxy and the amine respectively, while the peak 2970/cm was used as a reference peak. A review of a number of other techniques used to study the curing of epoxy resins together with on-line monitoring methods applied in processing thermoset resin is referred to. (Author)
ISSN:0094-243X