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Investigation of the curing behaviour of carbon fibre epoxy prepreg by dynamic mechanical analysis DMA

  • Carbon fibre prepregs have found widespread application in lightweight constructions. They are based on a carbon fibre fabric impregnated with reactive epoxy resin. Measurements were carried out using commercially available prepreg material. For Dynamic Mechanical Analysis (DMA), a single cantilever measuring device was applied. The DMA results were refined by additional DSC measurements. The measurements were carried out with dynamic heating in the temperature range -90 to 280 °C. The heating rates were 1 and 2 K/min, respectively. A glass transition of the uncured material (Tg0) near 1 °C, and crosslinking-induced vitrification and devitrification at the maximal glass transition temperature of the cured material (Tgmax) in the temperature range 220 to 230 °C were found. The activation energies for the glass transitions were determined using an Arrhenius plot. By detailed consideration of the influence of the frequency on the DMA data, indications for gelation were deduced.

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Metadaten
Autoren/innen:Wolfgang Stark
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Polymer Testing
Jahr der Erstveröffentlichung:2013
Organisationseinheit der BAM:6 Materialschutz und Oberflächentechnik
6 Materialschutz und Oberflächentechnik / 6.5 Polymere in Life Science und Nanotechnologie
Verlag:Elsevier Science
Verlagsort:Amsterdam [u.a.]
Jahrgang/Band:32
Ausgabe/Heft:2
Erste Seite:231
Letzte Seite:239
Freie Schlagwörter:CRP; Carbon fibre; Crosslinking; DMA; DSC; Devitrification; Epoxy; Glass transition; Prepreg; Vitrification
DOI:https://doi.org/10.1016/j.polymertesting.2012.11.004
ISSN:0142-9418
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:17.01.2013