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responsible for the mechanical properties exhibited by cured thermoset resins, the 3D cross-linked network also contributes to the chemical resistance of the material. Literature sources report the effects of the chemical structure on the chemical resistance of the cured product [120, 121]. The physical and chemical properties of thermoset polymers make them desirable for a wide range of applications, as stated previously. It is also these properties, especially in the case of chemical resistance, that creates a challenge for the recycling industry. Since thermoset polymers are largely insoluble in many environmentally sustainable organic solvents and cannot be melt processed, due to the presence of cross- links, it is necessary to consider alternative recycling processes. Similarly to PEEK, the focus of this research is on the deconstruction or decomposition of the polymer into smaller organic molecules that may find useful application, either within or external to the polymer industry. BADGE based resins are used extensively in food contact applications and concern has been raised over the potential for bisphenol A (BPA) to migrate from within the polymer matrix and contaminate food [122-124]. Particularly important are applications where the resin is in direct contact with liquids, such as the lining of cans used for canned foodstuffs [125, 126]. Research into the toxicity and mutagenicity of BPA is ongoing in the literature [127- 129], a common finding being that unreacted pre-polymer increases the possibility of exposure [130]. Migration is not unique to BPA and further studies have reported that derivatives of BPA have also been identified in foodstuffs, indicating that analysis of only BPA and its effects would be incomplete [131, 132]. Of the greatest concerns was the release of BPA and it’s derivatives from baby’s bottles, which potentially could have a 46PDF Image | Supercritical Fluids and Their Application to the Recycling of High-Performance Carbon Fibre Reinforced Composite Materials
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