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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 30: Bespoke carbon fibre alignment tool, manufactured by University of Birmingham, showing aligned fibre bundle set in Araldite Rapid resin With the wells at either end of the tool liner with aluminium, a small amount of Araldite Rapid epoxy resin (Huntsman Corporation, USA) was applied to either end of the bundle to provide a gripping surface. The resin was allowed to cure for a period of 24 hours prior to the sample undergoing tensile testing. Tensile testing was carried out using a Zwick-Roell Z030 (Zwick-Roell, Germany) with a testing speed of 2 mm min-1 and a data capture rate of 200 Hz. An Instron 100 N static load cell was used to measure the force applied to the fibre bundle. Tensile testing was also carried out using an Instron Micro Test 5848 (Instron, USA) using the same parameters. The cured epoxy resin applied to either end of the carbon fibre was used to grip and retain the fibre bundle within the Universal Testing Machine’s (UTM) grips. Once secured, the jaws were separated to remove the majority of the slack from the fibres, thereby reducing the testing time. With the slack removed, the cross-head separation and tensile force zeroed, the test was initiated and allowed to proceed until the fibres fractured, identified by a sharp decline in the tensile force with respect to jaw displacement. When the tensile force tended towards 0, the test was halted and the data saved. The sample was subsequently removed 149

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

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