Investigation of Carbon Fibre Reinforced Composites Based on Novel Phenylethynyl-Terminated Polyimde

Abstract

As part of the continuing studies to develop high performance composite based on new kind of phenylethynyl end-capped imide oligomers for aerospace applications, PETI-type polyimide composites were prepared from carbon fibre (CF) and polyimide matrix resin derived from dianhydride (s-BPDA), 2,5-bis(4-aminophenoxy)-biphenyl(p-TPEQ) and 4-phenylethynylphthalic anhydride (PEPA). The mechanical properties were tested at both room temperature and 177 °C. The flexural properties were determined by 3-point-bending at room temperature. Thermal aging test was carried out by exposing samples at 177°C over 1000 hours, and the mechanical properties were also evaluated before and after isothermal aging. It was demonstrated that the composite had good thermal and mechanical properties.