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across the cross-sectional area of the fibre. The alignment of bundles of carbon fibres has not been achieved to date and is likely to remain a challenge to the testing of carbon fibre bundles whilst the recycling industry is in its infancy. Fibre alignment may also be important when considering the manufacturing of composite materials from recycled carbon fibres, given that the composite material’s strength is dependent on the fibre orientation. 2. The reaction conditions developed through this research are demonstrated to be effective in the decomposition of a high-performance thermoplastic and high- performance thermoset resin. The decomposition of a commercially available CFRP has also been performed. However, in the case of the aerospace grade CFRP tested, it was found that the decomposition was less substantial. It is possible that an increase in temperature would significantly increase the rate and extent of the decomposition. 3. Both PEEK and polyepoxide resins are routinely reinforced with carbon fibres, enhancing the physical properties. The major decomposition product of both resins is phenol and the decomposition of both resins was found to be 1st order with respect to the caesium carbonate concentration. The decomposition of PEEK proceeds most efficiently in mixtures of alcohol and water, whereas the decomposition of the BADGE-based resin required 100 % alcohol. It is conceivable that a system comprising of 100 % R-OH, 10 mg ml-1 Cs2CO3 at 573 K could be used to initially decompose a BADGE-based thermoset resin, before injecting water 279PDF Image | Supercritical Fluids and Their Application to the Recycling of High-Performance Carbon Fibre Reinforced Composite Materials
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