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(a) Effect of different nozzle diameter on specimen’s tensile properties. Comparison with the tensile properties of bulk material with the same (5 wt.%) lignin content. (b) Effect of different CAM programs on tensile properties of specimens with the same toolpath and process parameters. Representative examples with and without premature internal failure. (c) Tensile properties of specimens produced from pure PLA and PLA/Lignin filament for two different nozzle diameters.
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