Online characterization of moisture transport in a high-performance carbon fiber-reinforced thermoplastic composite at high temperatures: Identification of diffusion kinetics

Deconsolidation of carbon fiber-reinforced PEKK laminates: 3D real-time in situ observation with synchrotron X-ray microtomography

“…This process may be enhanced by temperature which promotes moisture transport in the composites [31]. Our results also proved that an initial drying of the sample at 180 • C for 72 hours does not prevent pore nucleation.…”

“…A continuous weight measurement during drying experiments at different temperatures proved that this drying condition eliminated the effect of moisture without any thermal degradation of the material: no further significant weight change was observed at 180 • C after this duration. For further details, the reader may refer to our previous work [31]. WI samples were immersed in distilled water at room temperature (≈ 23 • C) for 3 months before the experiments.…”

“…Our results also proved that an initial drying of the sample at 180 • C for 72 hours does not prevent pore nucleation. We previously assumed that moisture may be stored in the composite in two forms namely "weakly bonded water" and "strongly bonded water" [31]. Drying at 180 • C for 72 h should effectively remove the "weakly bonded" water but "strongly bonded" water should remain in the composite due to the high thermal energy required to desorb it.…”