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Kinetics of curing reactions for epoxy-amine/polyethersulphone resins

  • Polymers
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Abstract

Differential scanning calorimetry (DSC) was used to indicate the relative extents of the different cure reactions of the 4-glycityloxyl-N, N-diglycidylaniline (MY0510), polyglycidyl ether of phenol formaldehyde novolac (DEN431) and 3,3 diamino diphenylsulphone (3,3 DDS) resin systems and how these were affected by the presence of polyethersulphone (PES). The extent of reactions at any given time decreased with increasing PES concentration and the reaction rate maximum shifted to longer times. The cured resin systems were examined using dynamic mechanical analysis (DMA). Broader β-transitions of lower intensities were observed in specimens containing PES, suggesting an increased range of relaxations within the transition.

Zusammenfassung

DSC wurde eingesetzt, um den relativen Anteil der verschiedenen Härtungsreaktionen von 4-Glycidyloxyl-N, N-diglycidylanilin (MY0510), Polyglycidylether von Phenolformaldehyd Novolack (DEN431) und 3,3-Diamino-diphenylsulfon (3,3 DDS) Harzsysteme sowie deren Beeinflussung durch die Gegenwart von Polyethersulfon (PES) zu bestimmen. Der Antell aller Reaktionen nimmt zu jeder Zeit mit steigender PES Konzentration ab und die maximalen Reaktionsgeschwindigkeiten werden später erreicht. Die gehärteten Harze wurden mittels DMA untersucht. In den PES-haltigen Materialien konnten breitere ß-Übergänge geringer Intensität beobachtet werden, was einen größeren Relaxationsbereich innerhalb des Überganges zeigt.

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Cracknell, G., Akay, M. Kinetics of curing reactions for epoxy-amine/polyethersulphone resins. Journal of Thermal Analysis 40, 565–573 (1993). https://doi.org/10.1007/BF02546626

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