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Here, gamma-rays were used at very high doses ranging from 5.0 × 10 5 to 3.0 × 10 6 Gy. The aim of this paper is to refer to the different types of polymer sheets from the point of view of the effect of gamma-ray irradiation on the transmission spectra and refractive indices from the visible to the infrared spectrum of the treated materials.
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The XRD pattern of pristine and irradiated sheets at different gamma doses is shown in Fig. 1.The patterns of the samples are characterized by halos extending in the 2θ range 10-60°. The main diffraction peak occurs at 2θ = 24.82 in pristine.The profile of the halos shows that the plastic bottle polymer sheets are a partly crystalline with a dominant amorphous phase.
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Linearized plastic plate models as Gamma-limits of 3D finite elastoplasticity. May 2013; ESAIM Control Optimisation and Calculus of Variations 20(3)
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Abstract Mechanical and structural characteristics of gamma-irradiated ABS plastic based on a high-molecular-weight technical acrylonitrile-butadiene-styrene polymer have been studied. The structure and mechanical characteristics of the ABS plastic, both pristine and irradiated with gamma-rays in air at doses of 50, 100, 150, and 200 kGy, have been evaluated. It has been shown that the.
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Introduction When radiation is used to sterilize medical devices, it is generally by gamma irradiation. Gamma is an irradiation technology based on radioactive cobalt-60 as source. Although very reliable and widely adopted by the industry, the cobalt presents challenges in terms of supply, transport, waste disposal and security (Dethier, 2016 ).
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For the optimization of the surface modification of plastic aggregates through gamma irradiation, the gamma irradiation doses were set at four levels of 25, 50, 75, and 100 kGy, with reference to previous studies [20,34,36,40,41,42,43,44] that considered the effect of gamma irradiation on the strength properties of cementitious composites at.
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What is its impact on material properties? Which factors affect the gamma radiation resistance of plastics? What are the standards for measuring the gamma radiation of plastics? How do various polymers rank in gamma radiation resistance? Importance of Gamma Radiation Resistance
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The growing quantities of plastic waste have raised environmental concerns, with almost a quarter of disposed plastics being sent to landfill. This has motivated research efforts into various recycling technologies to ease dependence on fossil resources, increasing circularity. Irradiation of various kinds, such as electron beam, beta and gamma rays, has been studied in the past as a way of.
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It was established that under a gamma-irradiation treatment with dose of 10-20 kGy, the PLA materials showed minor changes in structure and properties being suitable for application in packaging and in addition after irradiation with such doses their antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Salmonella.
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sources: the cobalt-60 radioisotope (gamma irradiation), or an electron accelerator, using either e-beams or, less commonly, X-rays. While all the above irradiation modalities are recognized in the applicable ISO standards, gamma irradiation dominates the radiation sterilization market and accelerator-based sterilization methods are only.
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The plastics were exposed to selected dosages of Cobalt-60 gamma radiation in vacuum and in air. Gas evolution and changes in infrared spectra as a result of irradiation were used to hypothesize the relative stability of these plastics to irradiation. Based on these facts it was found that plastics containing conjugated ring systems, ionic.
