RUBBER TOUGHENED EPOXY-CYANATE ESTER LIQUID RESINS: EFFECT OF RUBBER FUNCTIONALITY

摘要

Epoxy - cyanate ester resin blends were prepared that were capable of ambient injection and toughened using liquid rubber modifiers with differing terminal functionalities. Resin plaques and glass fabric composites were made and characterized. It was found that carboxyl terminal functionality on liquid butadiene-acrylonitrile (CTBN) rubber provided increased toughness over that of the same rubber backbone but amine terminated (ATBN). Of these two modifiers, only the CTBN phase separated after cure. Also, the adducting sequence of the rubber materials, to either the epoxy or cyanate ester part, altered the morphology, toughening efficiency, and processing of these materials.