ArticleScientific reports2026
Temporal evolution of structure property relationship for UV+RH artificially weathered material extrusion additive manufactured PLA.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
This study addresses the underreported temporal evolution of weathering on material extrusion additive-manufactured (MEX-AM) polylactic acid (PLA). Overcoming the limitation of arbitrary exposure durations in existing literature, a time-dependent investigation was conducted on MEX-PLA samples subjected to prolonged artificial weathering for up to 2000 h using a UV-B equipped accelerated weathering chamber with controlled relative humidity. The changes in mechanical, chemical and thermal properties were analysed at 200-hour intervals. The results revealed a time-dependent degradation mechanism characterised by β-chain scission. FTIR analysis confirmed the formation of C = C groups and the progressive loss of H groups, indicating substantial material degradation. Furthermore, DSC and XRD data demonstrated a progressive increase in crystallinity with prolonged exposure, leading to a significant reduction in tensile strength. At the same time, the tensile modulus remained relatively stable for MEX-AM PLA.
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