engleski

Influence of Ozone as an Air Pollutant on Polypropylene Fiber Properties

Ever increasing ozone concentrations in the earth˘s atmosphere polluted by photochemical smog raise the question of posible ageing of fibers in such an environment. This paper investigates polypropylene fibers characterized by pronounced ageing in the natural environment under the impact of sunlight. Fibers are exposed to ozone for vaying times and temperatures in a concentration range that can be expected in a heavily polluted urban industrial environment. Changes in the level of chemical compositzion and molecular configuration are investigated, together with morphological characteristics and end-use oxide grups are created, morphological surface changes occur, fibers become more brittle and lose strength, and the isotacticity of the configuration is pronounced, but there are some rather positive effects as well.

ozone; polypropylene fiber; ageing

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