Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Mechanical recycling"”.
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Mechanically mediated trithiocarbonate addition to commodity polymers for a more circular economy
Mechanical recycling, while thought of as environmentally conscious, is not nearly as effective as it is lauded to be. Great levels of mechanical force cause chain-scission and lower product value while simultaneously only working once, maybe twice before the material is useless. Studies to harness …
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Generation of Recyclable Liquid Crystalline Polymer Reinforced Composites for Use in Conventional and Additive Manufacturing Processes
… in the generation of more composite wastes. Mechanical recycling is a cost-effective and environmentally-friendly recycling method, but the loss in the quality of recycled glass or carbon fiber composite hinders the wide-spread use of this recycling method. It is important to develop novel …
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Technologies for plastic recycling
… food packaging. This situation results in low recycling rates for this type of waste and increased landfilling and incineration rates. These practices significantly contribute to climate change and global warming due to the high gas emissions they generate. Therefore, there is an urgent need to …
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Selective deconstruction of polyethylene to propylene via isomerization/metathesis and 1-hexene isomerization studies
… and resistance to degradation. Traditional recycling approaches—mechanical recycling and incineration—fail to offer selective, and circular solutions for effective PE waste management. This thesis explores an alternative strategy rooted in chemical upcycling, where PE is selectively …
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Influence of Polyolefin Contamination on the Thermal Characteristics of Bottle Grade Recycled Polyethylene Terephthalate
During the mechanical recycling, especially during the sorting and separation process of bottle grade PET, cross contamination with polyolefin is inevitable. Very small number of polyolefin bottles, caps and closures pass through the separation process and get recycled with PET bottles and affect …
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Kinetic modeling frameworks for the chemical recycling of polyolefins
… of them have been recycled. However, current mechanical recycling cannot solve the issue that material properties will degrade during the recycling process. Chemical recycling offers new pathways by converting polymers back into valuable molecules selectively, but the underlying reactions are …
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Reducing the Environmental Impact of Wind Turbine Blades
… current ‘optimal’ EoL option is life extension; mechanical recycling is the current ‘optimal’ recycling option; chemical recycling will be the ‘optimal’ option for the future. Future research is suggested as aiming to improve the performance of recycled fibre or to reduce the energy consumption …
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A life cycle-based investigation into the potential of a circular and low-carbon plastics economy in South Africa
… and regulatory objectives and include increased mechanical recycling, the shift from single-use consumption to reuse, and decarbonisation of the sector by integrating renewable energy into the electricity mix as well as replacement of the fossil fuel feedstock for monomer production. Furthermore, …
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Upcycling of Polystyrene, Polyolefin, and Polyvinyl Chloride Waste into Chemicals, Surfactants, and Lubricants
… owing to their excellent physicochemical and mechanical performance in many applications. As a consequence of widespread use, addition polymerization plastics contribute significantly to plastic pollution. Unfortunately, existing remediation approaches (i.e., mechanical recycling) have not …
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Polymeric Melodies: Polyetherimide Modification-Based Acoustic Membranes and Sonochemical Degradation of Polystyrene
… generation of nanocomposites, effective chemical recycling of waste plastics has become paramount to solving the current pollution crisis. While most see discarded plastic as waste with no inherent value, the modern chemist sees a feedstock waiting to be mined for the valuable moieties and energy …