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A simple and rapid method is described in which infrared spectroscopy is used to follow the decrease in the epoxy content of an epoxy resin as it is cured. A film of resin plus curing agent between two disks of potassium bromide is cured by heat and its infrared spectrum is measured as the cure proceeds. The technique is used to compare the activities of diamines as curing agents.
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Feazel et al. (1957) studied this question.
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