Encyclopedia of Polymer Science and Technology 2001
DOI: 10.1002/0471440264.pst401
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Weathering

Abstract: The irreversible changes in chemical and physical properties of polymeric materials exposed to the environment are caused by the combined action of all weather factors, including solar radiation, heat, moisture, oxygen, and atmospheric pollutants. However, the actinic radiation of the sun absorbed by materials is the critical factor. It initiates the chemical reactions that lead to degradation through its bond breaking capabilities. The wavelength specificity of degradation, and its material dependency are ill… Show more

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Cited by 4 publications
(13 citation statements)
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“…As lâmpadas de arco de xenônio com filtro de vidro borossilicato são melhores que as lâmpadas de arco carbono ou que as fluorescentes (UVA e UVB) para simular o espectro total da luz solar (Searle;1989).…”
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“…As lâmpadas de arco de xenônio com filtro de vidro borossilicato são melhores que as lâmpadas de arco carbono ou que as fluorescentes (UVA e UVB) para simular o espectro total da luz solar (Searle;1989).…”
Section: Tipos De Envelhecimentounclassified
“…(recomendada pela ASTM D1435), visando o maior tempo de exposição solar e maiores incidências de radiação durante o ano; 0° e 90° para produtos que ficarão nestas posições durante seu uso e 5° para que simule a exposição de 0° com alguma drenagem de chuva (Searle;1989).…”
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