Effect of water sorption in neat poly(ether ketone ketone) and its carbon fiber reinforced composite
Résumé
Poly(ether ketone ketone) (PEKK) is a high performance thermoplastic polymer with excellent mechanical properties, which aims to replace epoxy currently widely used as matrices in aircraft composites. Knowing the aircrafts service life, it is of great importance to evaluate the durability of its constitutive materials. In this paper, water sorption of both PEKK neat resin as well as in its continuous carbon fiber composite (C/PEKK) is fully characterized using both water immersion and dynamic vapor sorption (DVS) methods. Water transport in PEKK follows Henry's law whereas a clear deviation from this behavior is observed in C/PEKK at high relative humidities. Water diffusion in unidirectional consolidated C/PEKK has been modeled using finite element method based on water transport parameters determined in neat PEKK.
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