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10 de dic. de 2022 · UV-driven plastic degradation varies between locations and environments. •. Knowledge gaps exist on wavelength sensitivity and dose-response of degradation. Understanding the fate of plastics in the environment is of critical importance for the quantitative assessment of the biological impacts of plastic waste.
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1. Introduction. The first reports of plastics litter in the...
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Aquí nos gustaría mostrarte una descripción, pero el sitio...
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UV radiation causes photooxidative aging, which results in...
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UV-radiation and oxygen are the most important factors that initiate degrdn. of polymers with a carbon-carbon backbone, leading to chain scission. Smaller polymer fragments formed by chain scission are more susceptible to biodegrdn. and therefore abiotic degrdn. is expected to precede biodegrdn.
23 de ago. de 2013 · Exposure to ultraviolet (UV) radiation may cause significant degradation of many materials. UV radiation causes photooxidative degradation which results in breaking of the polymer chains, produces radicals and reduces the molecular weight, causing deterioration of mechanical properties and leading to useless materials, after an ...
1 de abr. de 2021 · UV radiation is mainly responsible for the initiation of degradation. Many advanced technologies have been developed to characterize the degradation of plastics. Degradation causes oxidation and chain-scission of plastic polymers, forming low molecular weight degradation products and causing changs in physicochemical and mechanical ...
12 de dic. de 2019 · As ultraviolet (UV) radiation consists of photons with high energy relative to visible light, it can cause degradation in the form of physical and chemical changes in susceptible materials.
In polymer chemistry photo-oxidation (sometimes: oxidative photodegradation) is the degradation of a polymer surface due to the combined action of light and oxygen. [1] It is the most significant factor in the weathering of plastics. [2]
