In-situ investigations of the curing of a polyester resin |
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Authors: | Maria A. VargasKerstin Sachsenheimer Gisela Guthausen |
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Affiliation: | Karlsruher Institut für Technologie (KIT), Institut für Mechanische Verfahrenstechnik und Mechanik (MVM), SRG10-2, 76131 Karlsruhe, Germany |
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Abstract: | Quasi-isothermal curing of a polyester resin was studied at different catalyst concentrations and temperatures in-situ by 1H-NMR relaxometry and NIR spectroscopy simultaneously. Sample and probe temperatures were also recorded. An autocatalytic kinetic model, optionally including a diffusion term, was successfully applied to describe and predict the curing kinetics of the polyester resin as a function of temperature and catalyst concentration, although the diffusion effect is relatively weak in the investigated system under the experimental conditions. The corresponding kinetic coefficients and the reaction activation energy were obtained by fitting the models to the data, assuming an Arrhenius relation. |
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Keywords: | In-situ1H-NMR relaxometry NIR spectroscopy Polyester resin Kinetics Autocatalytic model Diffusion control Curing reaction |
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