IMPROVING THE TOUGHENABILITY OF INHOMOGENEOUSLY CROSSLINKED EPOXY RESINS WITH BIMODAL MOLECULAR WEIGHT DISTRIBUTIONS

摘要

In general, the single resin systems used in these experiments follow the same correlations between fracture toughness, glass transition temperature, and molecular weight between crosslinks that have been observed in the literature. The toughenability resulting from the addition of nanorubber or nanosilica to single molecular weight epox-ies only resulted in a slight improvement in fracture toughness. These results were similar to literature observations, except the case of 20 vol% NS being considerably lower than expected. The amount of toughenability was the same for epoxy resins of both low and intermediate molecular weight.