engleski

Some effects of γ-radiation on poly(lactic acid) filaments

Poly(lactic acid) (PLA) is a biodegradable polymer that has a wide application from food packaging to medical implants [1]. In this study, commercially available 3D printing (2.85 mm) PLA filaments was used to investigate the influence of high energy radiation on structural parameters. Samples were irradiated in a 60Co γ-source at room temperature in the presence of air, using a dose rate of 7, 94 Gy/s. Total irradiation doses were varied from 25 kGy to 300 kGy. Electron spin resonance (ESR), a powerful tool in radical detection, was used as the principal technique. FTIR spectroscopy was applied to investigate structural changes caused by irradiation, while the changes in mechanical behavior were investigated on a testing machine. Changes induced by samples irradiation, observed by ESR and FTIR spectroscopy as well as by mechanical measurements, will be reported and discussed, based on the results found in the literature [2, 3]. [1] L. T. Sin, A. R. Rahmat, W. A. W. A. Rahman (2012). Polylactic Acid: PLA Biopolymer Technology and Applications, Elsevier, Amsterdam, 2012. [2] P. Nugroho, H. Mitomo, F. Yoshii, T. Kume, Polym. Degrad. Stabil. 72 (2001) 337-343. [3] H. Y. Lin, S. Y. Tsai, H. T. Yu, C. P. Lin., J. Polym. Environ. 26 (2018) 122-131.

Poly(lactic acid) ; PLA, γ-radiation ; structure

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