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- W4281663152 abstract "Thermoplastic is one of the most popular materials used in additive manufacturing (AM). As the adoption of AM technologies has been rapidly increasing, the feasibility of recycling AM waste and the quality of recycled materials need to be investigated to facilitate closed-loop material flow and cleaner production. In current literature, studies have been performed to compare material property changes before and after recycling, and a certain level of mechanical degradation has been observed. Some material properties such as molecular weight distribution have not yet been investigated in AM recycling. In addition, the recyclability of waste materials under multiple rounds of recycling has not yet been well studied. These knowledge gaps indicate a research need for AM material recyclability evaluation and improvement. In this research, an assessment framework is proposed and implemented to evaluate the recyclability of acrylonitrile butadiene styrene in extrusion-based AM, providing guidelines for quantifying variations of molecular weight distribution, material density, fabrication quality, and mechanical properties under multiple rounds of recycling. Different process parameters and their impact on material recyclability in each round are also studied. Experimental results indicate that the ultimate tensile strength degradation after each recycling round varies from 27% to over 50%; surface roughness increases 29.54% after three rounds of recycling; molecular weight distribution of recycled materials demonstrates obvious shifts, and the polydispersity is decreased by 13.16% after three rounds of recycling. The results of this research will help AM users better understand and implement waste recycling, which will positively impact the AM community by contributing towards achieving cleaner production and enhancing the material efficiency and environmental sustainability of AM." @default.
- W4281663152 created "2022-06-13" @default.
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- W4281663152 date "2022-08-01" @default.
- W4281663152 modified "2023-10-14" @default.
- W4281663152 title "Towards closed-loop material flow in additive manufacturing: Recyclability analysis of thermoplastic waste" @default.
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- W4281663152 doi "https://doi.org/10.1016/j.jclepro.2022.132427" @default.
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