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Jumpwise deformation of polymethyl methacrylate in the microplasticity region
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This physics paper studied how a transparent plastic material deforms in tiny incremental jumps at the microscale under compression, finding that low doses of gamma radiation and magnetic fields cause slight hardening. This is a materials physics study on polymer mechanics with no direct relevance to environmental microplastics.
The deformation rate with a step of 325 nm has been measured under uniaxial compression at the initial stage of creep and shape recovery of a polymethyl methacrylate (PMMA) sample after unloading. The effect of low γ-ray doses and magnetic fields on the deformation has been studied. It has been shown that a weak pre-exposure of the PMMA sample structure to radiation and magnetic fields can cause a slight hardening in the microplasticity region. The deformation jump sizes have been determined on micro- and nanoscales. The effect of irradiation and magnetic fields manifests itself as redistributed contributions of various jumps to the deformation.
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X-ray and magnetic-field-enhanced change in physical characteristics of silicon crystals
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This physics study examined how low-dose X-ray radiation and magnetic fields change the mechanical and structural properties of silicon crystals by affecting dislocation behavior. This is a condensed matter physics study with no relevance to environmental microplastics.
Role of Densification in Deformation of Glasses Under Point Loading
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This materials science paper proposes that so-called 'microplastic effects' in glass under point loading are caused by densification rather than conventional plastic flow. The research focuses on glass mechanics and hardness, using 'microplastic' in an engineering context with no relation to environmental plastic pollution.
MECHANICAL PROPERTIES, PHYSICS OF STRENGTH, AND PLASTICITY XRay and MagneticFieldEnhanced Change in Physical Characteristics of Silicon Crystals
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This duplicate entry describes the same physics study as paper 80054, examining how low-dose X-ray radiation and magnetic fields affect dislocation behavior and physical properties of silicon crystals. This is a condensed matter physics study with no relevance to environmental microplastics.
Investigation of the Impact of Chemical Modifications on the Photostability of Polymethyl Methacrylate
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This study modified polymethyl methacrylate (PMMA), a common plastic used in many consumer products, by attaching metal-containing compounds to make it more resistant to UV light degradation. While focused on improving plastic durability, the findings relate to microplastics because UV breakdown is one of the main ways plastics fragment into microplastics in the environment. Making plastics more UV-resistant could potentially slow the creation of microplastics from sun-exposed plastic products.
Variation of Young's modulus suggested the main active sites for four different aging plastics at an early age time
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Researchers measured changes in Young's modulus — a measure of material stiffness — in microplastic particles of four different polymer types following environmental degradation, finding that mechanical properties changed in distinct patterns depending on the polymer's crystalline structure and degradation pathway. The results provide material-specific data on how weathering alters the physical behavior of microplastics in the environment.
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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.