@article{
author = "Golubović, Zorana and Bojović, Božica and Kirin, Snežana and Milovanović, A. and Petrov, Ljubiša and Anđelković, Boban and Sofrenić, Ivana",
year = "2024",
abstract = "Additive manufacturing, with its fast development and application of polymeric materials, led to the wide utilization of polylactic acid (PLA) materials. As a biodegradable and biocompatible aliphatic polyester, produced from renewable sources, PLA is widely used in different sectors, from industry to medicine and science. The aim of this research is to determine the differences between two
forms of the PLA material, i.e., fused deposition modeling (FDM) printed filament and digital light
processing (DLP) printed resin, followed by aging due to environmental and hygiene maintenance
conditions for a period of two months. Specimens underwent 3D scanning, tensile testing, and
Fourier transform infrared (FTIR) spectrometry to obtain insights into the material changes that
occurred. Two-way Analysis of Variance (ANOVA) statistical analysis was subsequently carried out
to determine the statistical significance of the determined changes. Significant impairment can be
observed in the dimensional accuracies between both materials, whether they are non-aged or aged. The mechanical properties fluctuated for aged FDM specimens: 15% for ultimate tensile stress, 15% for elongation at yield, and 12% for elastic modulus. Regarding the DLP aged specimens, the UTS decreased by 61%, elongation at yield by around 61%, and elastic modulus by 62%. According to the FTIR spectral analysis, the PLA materials degraded, especially in the case of resin specimens. Aging also showed a significant influence on the elastic modulus, ultimate tensile stress, elongation at yield, elongation at break, and toughness of both materials, which was statistically shown by means of a two-way ANOVA test. The data collected in this research give a better understanding of the underlying aging mechanism of PLA materials.",
publisher = "MDPI",
journal = "Polymers",
title = "Effect of Aging on Tensile and Chemical Properties of Polylactic Acid and Polylactic Acid-Like Polymer Materials for Additive Manufacturing",
pages = "1035",
volume = "16",
doi = "10.3390/polym16081035"
}