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Abstract

Research has been conducted to investigate the water absorption in carbon fiber reinforced polyether ether ketone (PEEK/C.F.) and polyphenylene sulfide compos ites (PPS/C.F.). Effect of humidity and temperature on tensile, flexural and impact strength of these composites was also studied.

Results indicated that the waters absorbed in PPS/C. F. and PEEK/C. F. are 0.059 wt% and 0.138 wt% respectively. The diffusion process is a classical Fickian diffusion in the temperature region investigated. The activation energies of diffusion are 667 cal/g-mole (for PPS/C.F.) and 8934 cal/g-mole (for PEEK/C.F.).

The retention of mechanical properties of these composites is very good under hot-wet condition. These composites materials can be served as high performance materials even in the hostile environment. PEEK/C.F. composites show excellent mechanical properties retention even at 80°C and 75% R.H.

Keywords

PPS PEEK carbon fiber reinforced composites environmental effect water absorption mechanical properties.

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Environmental Effect on the Water Absorption and Mechanical Properties of Carbon Fiber Reinforced PPS and PEEK Composites

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