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temperature. Heating times were approximately 50 minutes, whereas cooling times were approximately 30 minutes. The Cs2CO3 and PEEK concentrations were maintained at 10 mg ml-1 for all experiments. The reaction mixture was a co-solvent comprising of 80 %v H2O and 20 %v EtOH, the reaction temperature was 623 K. The reaction schedule is given in Table 5. Table 5: Reaction schedule for the investigation of effects of reaction time on the decomposition of PEEK in H2O / EtOH Sample tr MPEEK T (min) (g) (K) 1 0 0.57 2 5 0.59 3 10 0.59 4 20 0.56 623 5 30 0.59 6 60 0.59 7 120 0.57 P (MPa) 16.9 ± 0.3 [H2O] [EtOH] (%v) (%v) 80 20 [Cs2CO3] (mg ml-1) 10 Decomposition of PEEK using an H2O and PrOH Co-solvent System The methodology for the investigation into the decomposition of PEEK using an H2O / PrOH co-solvent system is identical to the methodology for the H2O / EtOH system. The reaction schedules for the investigation of [Pr-OH], [Cs2CO3] and reaction time are given in Tables 6, 7 and 8 respectively. 92PDF Image | Supercritical Fluids and Their Application to the Recycling of High-Performance Carbon Fibre Reinforced Composite Materials
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