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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.
10 de dic. de 2022 · Relative to photo-oxidation, biodegradation is much slower and is not thought to remove plastics from the environment in a readily observable timescale. Solar UV radiation is thus the primary factor that drives generation of MP fragments.
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 ...
1 de ago. de 2018 · UV radiation causes photooxidative aging, which results in the breakage of polymer chains, produces free radicals and reduces the molecular weight of polymers, resulting in a loss of surface gloss and the significant deterioration of many material properties with time.
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]
18 Citations. 5 Altmetric. Explore all metrics. Abstract. The deleterious effects of solar ultraviolet (UV) radiation on construction materials, especially wood and plastics, and the consequent impacts on their useful lifetimes, are well documented in scientific literature.
