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Erosion and Fragmentation of semi-crystalline polymers. Release of microplastics in the ocean
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This study examined the erosion and fragmentation of semi-crystalline polymers in the ocean and the mechanisms by which these processes generate microplastics. The research was presented as an international conference contribution.
International audience
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An experimental and theoretical study of the erosion of semi-crystalline polymers and the subsequent generation of microparticles
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Researchers studied how semi-crystalline polymers erode and generate microparticles under physical and chemical stress, providing insight into how large plastic items break down in the environment. Understanding degradation kinetics is essential for predicting how microplastics accumulate over time.
Microstructure Characterization of Oceanic Polyethylene Debris
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This study characterized the microstructure of polyethylene debris collected from the ocean, finding that marine weathering produces surface cracking, crystallinity changes, and nanoscale particle formation consistent with progressive fragmentation. Researchers provide evidence that oceanic plastic debris undergoes structural degradation pathways that generate nanoplastics over time.
Degradation and Fragmentation of Microplastics
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This review examines the degradation and fragmentation mechanisms that generate secondary microplastics from ocean plastic debris, covering photo-oxidation chemistry, environmental weathering rates, and how different polymer types break down under marine conditions.
Mechanism of Quiescent Nanoplastic Formation from Semicrystalline Polymers
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Researchers investigated the mechanism by which semicrystalline polymers spontaneously generate nanoplastics, finding that chain scission events accumulate in the amorphous phase between crystalline layers and lead to mechanical failure of the semicrystalline morphology, explaining how nanometer-scale bond-breaking events produce the relatively large micro- and nanoplastic fragments observed in the environment.
Rapid oxidative fragmentation of polypropylene with pH control in seawater for preparation of realistic reference microplastics
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Researchers developed a method to produce realistic reference microplastics by rapidly fragmenting polypropylene through oxidative treatment in seawater with pH control, and characterized the resulting particles using SEM/EDX to confirm their similarity to environmentally weathered microplastics.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.