Improved Graphite Fiber/Acetylene Terminated Matrix Resin Prepreg Products

摘要

Acetylene terminated resin formulations were screened and selected in order to provide a composite matrix resin that retained the excellent hot/wet properties of the acetylene terminated resins themselves, but improved on their toughness. Resin formulations were screened in neat resin form and the three formulations having the best balance of toughness and hot/wet properties, as well as good handling characteristics, were scaled-up to tape using unsized AS-4 fiber. A formulation, designated CATB-44, had the best balance of properties and was selected for further optimization. Properties of CATB-44 reinforced with either AS-4, T300, T500, T40, or IM7 were compared. T300 provided the best edge delamination and 90 degree flexural strength, and AS-4 the worst. Keywords: Acetylene terminated resins, Composite matrix resin, Delamination resistance, Hot/Wet flexural strength, Thermal spiking, Graphite. (jes)