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• W4385728507 endingPage "110506" @default.
• W4385728507 startingPage "110506" @default.
• W4385728507 abstract "Polylactic acid (PLA) is a biodegradable and biocompatible thermoplastic that is commonly used in 3D printing. Despite being widely utilized, PLA is susceptible to degradation by both UV light and hydrothermal conditions. This study investigated the effects of 3D printing temperature, UV light exposure, and hydrothermal aging on the properties of PLA. Samples were 3D printed at temperatures of 190, 205, 220 and 235°C. The specimens were then aged under UV light and thermal cycling or hydrothermally at 80°C for up to 6 weeks. The aged materials were then characterized using X-ray diffraction (XRD), thermos-gravimetric analysis (TGA), microscopy, mechanical testing, and ultimately Raman spectroscopy. Results showed that the PLA cristallinity increases with aging time in both hydrothermal and under UV exposure conditions, while mechanical strength decreases. Additionally, the UV exposure caused the formation of monomers and oligomers on the outermost layers. Printing temperature was shown to play only a minor role in the determination of the chemophysical properties of the 3D printed components, with faster degradation occurring on samples printed at higher temperatures, which also resulted in higher amounts of monomer when exposed to UV light for 6 weeks. The relative intensities of specific regions of the Raman spectra obtained on the aged samples could be successfully correlated with both the mechanical strength and chemo-physical properties such as the decomposition temperature. The algorithms developed in this study enable non-destructive analysis of PLA components, allowing for the determination of the extent of structural degradation due to environmental aging and the expected residual mechanical resistance." @default.
• W4385728507 created "2023-08-11" @default.
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• W4385728507 date "2023-10-01" @default.
• W4385728507 modified "2023-09-27" @default.
• W4385728507 title "Non-destructive spectroscopic diagnostic tools for the assessment of the mechanical strength of 3D-printed PLA" @default.
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• W4385728507 doi "https://doi.org/10.1016/j.polymdegradstab.2023.110506" @default.
• W4385728507 hasPublicationYear "2023" @default.
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