Photodegradation of Polymer Materials

摘要: It has been known for hundreds of years that polymer materials like native nbers are degraded by exposure to sunlight. This is called ‘tendering’ and applies textile fabrics made cotton, linen other cellulosic fibers. Bleaching in sunlight textiles from the slightly yellow virgin cellulose fibers common practice both housewives producers a very long time it still used. By 1880s was already established experiment brightening off-white accompanied gradual weakening fibers.1 After 1900, when dyed became common, observed presence certain dyes further tendered during bleaching. When exposed sunlight, accelerated degradation.2 also degradation caused not only ultraviolet part but radiation lamps. For fibers, visible light all wavelengths could cause degradation, nature sensitizing mechanism reaction at this time. The photodegradation treated Section 12.3.12.