AbstractDynamic mechanical experiments have been conducted on an epoxy system made with tetraglycidyl 4,4′‐diaminodiphenyl methane (TGDDM) and polyglycidyl ether of Bisphenol A Novalac that were cured with 4,4′‐diaminodiphenyl sulfone (DDS) in the presence of Boron trifluoride monoethylamine catalyst (BF3:EtNH2). As the concentration of BF3:EtNH2increased, the low temperature β‐transition magnitude increased slightly. The α1‐transition observed in the uncatalyzed system decreased significantly with the addition of BF3:EtNH2catalyst. The α2or glass transition temperature of this system increased with increasing catalyst concentration. Both the catalyzed and uncatalyzed epoxy formulations studied in this work are important due to their similarity to systems used commercially in epoxy mat
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