Evaluation of degradation of ultraviolet-C irradiated polylactic acid/carbon-fiber composites using fluorescence spectroscopy
Source abstract
Abstract
In this study, the effects of ultraviolet-C (UV-C) exposure on polylactic acid/carbon-fiber (PLA/CF) composite and PLA were evaluated using Fourier transform infrared spectroscopy (FT-IR), 3D fluorescence spectroscopy, differential scanning calorimetry (DSC) and tensile testing. The PLA specimens irradiated with UV-C for 0–15 days were not only oxidized on the surface, but also showed a decrease in the thermal and mechanical properties as the number of days of UV-C exposure increased, due to the cleavage of PLA chains. On the other hand, for the PLA/CF specimens, although surface oxidation was induced by UV-C irradiation, they did not undergo chain breakage, and their thermal and mechanical properties were retained. Therefore, carbon fibers play an important role not only as a reinforcement for PLA but also as a barrier to UV degradation. Furthermore, our results suggest that 3D fluorescence spectroscopy can be useful for the evaluation of accelerated degradation of polymer samples.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: biodegradable polymer synthesis and properties · Microplastics and Plastic Pollution · Additive Manufacturing and 3D Printing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Advanced Fibro-Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
Faculty of Cultural Studies, Kyoto Sangyo University, Motoyama, Kamigamo, Kita-ku, Kyoto, 603-8555, Japan
Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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