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Supercritical Fluids and Their Application to the Recycling of High-Performance Carbon Fibre Reinforced Composite Materials

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Supercritical Fluids and Their Application to the Recycling of High-Performance Carbon Fibre Reinforced Composite Materials ( supercritical-fluids-and-their-application-recycling-high-pe )

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Figure 13: HPDSC Method 4, dynamic measurement of polymer transition temperatures.118 Figure 14: HPDSC Method 5, rapid heating through all polymeric transitions Tg, TC and Tm 119 Figure 15: TGA Method 1, post scCO2 processing analysis of PEEK ......................................121 Figure 16: DSC Method 2 used for the analysis of recovered epoxy resin samples. dT / dt = 10 K min-1 ...............................................................................................................................122 Figure 17: TGA Method 2 used for the analysis of thermoset and thermoplastic polymers and their associated composite materials. dT / dt = 10 K min-1............................................123 Figure 18: GC-MS Method 1 used for the separation and subsequent identification of polymer decomposition products. Column = ZB5-MS, dT / dt = 20 K min-1, QHe = 1 ml min-1, VINJ = 1 μl ................................................................................................................................126 Figure 19: GC-MS Method 2 used for the separation and subsequent identification of polymer decomposition products. dT / dt = 13.25 K min-1, QHe = 1 ml min-1, VINJ = 1 μl ......127 Figure 20: HPLC Method 1 for the separation of polymer decomposition products. Q = 1 ml min-1, TCOL = 308 K, P = 15 MPa, VINJ = 10 μl...........................................................................128 Figure 21: HPLC Calibration curve for phenol concentrations [PhOH] given in Table 19. λ = 254 nm, HPLC Method 1, R2 = 0.998......................................................................................131 Figure 22: EIS Schematic Diagram, working electrode (WE), counter electrode (CE), reference electrode (RE).........................................................................................................................134 Figure 23: EIS Equivalent circuit, system impedance (RS), carbon fibre impedance (R1) ......136 Figure 24: Single carbon fibre with 25 m Molybdenu ................................................................................................................................................ 136 Figure 25: SEM Micrograph of the single carbon fibre, 150 mm in length (full length not shown), subsequently used in Electrical Impedance Measurements ...................................137 Figure 26: Impedance as a function of length for single carbon fibres.................................139 14 m

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