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fluorescent sunlamp
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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780153
EISBN: 978-1-62708-281-5
... and fadeometer and the use of fluorescent sunlamp in test devices. xenon arc lamp weatherometer fadeometer outdoor weather aging radiation susceptibility fluorescent sunlamp plastics ALL ENGINEERING PLASTICS are affected by outdoor weather. Weather and radiation factors that contribute...
Abstract
This article presents a general overview of outdoor weather aging factors, their effects on plastic materials, and the accelerated test methods that can be used to estimate the reaction of a plastic component during actual use. Weather and radiation factors that contribute to degradation in plastics include temperature variations, moisture, sunlight, oxidation, microbiologic attack, and other environmental elements. The article also describes the tests used to predict the behavior of a plastic material to outdoor exposure, discussing the use of xenon arc lamp for the weatherometer and fadeometer and the use of fluorescent sunlamp in test devices.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780329
EISBN: 978-1-62708-281-5
... ignored in the design of apparatuses used to accelerate the degradation of polymers for test purposes (specifically, fluorescent sunlamp devices). This is one of the reasons why accelerated weathering results do not always correlate with outdoor exposure results. Ozone limits the energy of photons...
Abstract
This article provides a basic review of polymer photochemistry as it relates to the weatherability of engineering plastics, considering the chemistry induced by exposure to sunlight in open air. Elementary aspects of weatherability chemistry that are discussed include the light wavelengths responsible for polymer photochemistry, problems with artificial light sources, general photooxidation and specific photochemical reactions important in plastics, and the factors influencing the rate of degradation. The approaches used to stabilize plastics against photochemical damage, including ultraviolet light absorbers, oxidation inhibitors, and the use of protective coatings, are also considered.