Cyanate ester resins are attractive to the aerospace industry due to their excellent dielectric and elevated temperature properties. However, for some specific applications, the need for increased fracture toughness has become apparent. Thus, an epoxy-terminated rubber was used as a toughness modifier and the cure kinetics including processability of the model resin were investigated with a variety of thermal analytical tools. The carbon fiber reinforced laminates, fabricated using a resin transfer molding process, had no decrease in thermal properties even with increasing elastomer content.
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