2 Leak rates, permeability, diffusivity and sample behaviour for CF-PEEK autoclaved laminates of similar thickness, CF-Epoxy Laminate of similar layup but different thickness an, un-reinforced PEEK and PVC all tested at 1 bar. Laminate No of Leak rate Permeability Diffusivity Behaviour samples x̅ Cv(%) Cv(%) (m2/s) Cv(%) 4 8.5 ×10 -5 4 4.3×10-17 5 1.9×10-11 4 Near-Fickian C4AC 1 6.5 ×10 -7 - 3.2×10-19 - - - - 4 5.2×10-5 15 2.6×10-17 15 9.5×10-12 8 Near-Fickian C7AC 3 1.1×10-4 1 5.5×10-17 1 1.7×10-11 8 Near-Fickian T4AC 4 7.0×10-5 8 4.0×10-17 8 1.8×10-11 16 Near-Fickian S7AC1 1 1.3×10-5 - 1.5×10-17 - 1.2×10-11 - Near-Fickian CF-Epoxy 1 9.0×10-4 - 5.6×10-16 - 1.6×10-10 - Fickian PEEK 1 1.6×10-3 - 6.8×10-16 - 2.5×10-10 - Fickian PVC aTested at -196°C
2 Leak rates, permeability, diffusivity and sample behaviour for CF-PEEK autoclaved laminates of similar thickness, CF-Epoxy Laminate of similar layup but different thickness an, un-reinforced PEEK and PVC all tested at 1 bar. Laminate No of Leak rate Permeability Diffusivity Behaviour samples Cv(%) Cv(%) Cv(%) C4AC 4 1 8.5 ×10 -5 6.5 ×10 -7 4 - 4.3×10-17 3.2×10-19 5 - 1.9×10-11 - 4 - Near-Fickian - C7AC 4 5.2×10-5 15 2.6×10-17 15 9.5×10-12 8 Near-Fickian T4AC 3 1.1×10-4 1 5.5×10-17 1 1.7×10-11 8 Near-Fickian S7AC1 4 7.0×10-5 8 4.0×10-17 8 1.8×10-11 16 Near-Fickian CF-Epoxy 1 1.3×10-5 - 1.5×10-17 - 1.2×10-11 - Near-Fickian PEEK 1 9.0×10-4 - 5.6×10-16 - 1.6×10-10 - Fickian PVC 1 1.6×10-3 - 6.8×10-16 - 2.5×10-10 - Fickian aTested at -196°C x̅ (m2/s)
Permeability_of_Carbon_Fibre_PEEK_Composites_all_.docx