02476nam a2200337Ia 4500 MX-MdCICY 20260521091752.0 CICY B-21069 Environmental Degradation of nylon, poly (ethylene terephthalate)(PET), and poly (vinylidene fluoride)(PVDF)fishing line fibers ACS Applied Polymer Materials, 5(6), p.4427-4436, 2023 Ghost fishing, caused by lost fishing lines and nets, has become a severe problem in marine environments. To eliminate ghost fishing in the ocean, the environmental degradation behavior of fishing lines must be understood. In this study, the environmental degradation of biodegradable nylon 4 fishing lines and commercial nylon 6, poly(ethylene terephthalate)(PET), and poly(vinylidene fluoride)(PVDF)fishing lines was simulated in the laboratory using an artificial weathering tester and biodegradation test in extracted seawater. To understand the degradation mechanism, the chemical and structural changes induced by photo-oxidation and biodegradation were investigated using tensile test, scanning electron microscopy, differential scanning calorimetry, gel permeation chromatography, infrared spectroscopy, and wide- and small-angle X-ray scattering. The results indicated that photo-oxidation occurred in the amorphous phase of the nylon 4, nylon 6, and PET fishing lines during ultraviolet (UV)exposure. The nylon 4 fishing lines exhibited excellent biodegradability, whereas the nylon 6, PET, and PVDF fishing lines could not be degraded by microorganisms in the extracted seawater. Both processes, i.e., photo-oxidation and biodegradation, were confined to the amorphous regions of nylon 4. Note that the PVDF fishing lines could not be degraded by UV exposure and biodegradation and, hence, should be recycled after use. GHOST FISHING DERELICT FISHING LINES NYLON 4 NYLON 6 PET PVDF PHOTO-OXIDATION BIODEGRADATION An, Y. Kajiwara, T. Padermshoke, A. Van Nguyen, T. Feng, S. Mokudai, H. Takahara, A. https://drive.google.com/open?id=14uC0EQmfd6don0QAchMMso91GPk7Kzcg&usp=drive_copy Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 31086 31086 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-21069 2025-06-25 16:25:00 2025-06-25 REF1