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1 Composites Theory and Practice

1 2022

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Selected properties of polypropylene-TiO2 composites after exposure to UV rays – preliminary study

100%

Olesik P. , Peryt A. , Stępień K. , Frączek V. , Mackiewicz K. , Molka W. , Musiał O. , Różańska W. , Jesionek M.

tom R. 22, nr 1

21--24

In this study the mechanical properties of polypropylene (PP) with a small amount of TiO2, after UV-C exposure were preliminarily analyzed. The effectiveness of titanium oxide was evaluated in two alternative applications: TiO2 as the polymer filler and TiO2 as a protective outer coating. The samples were exposed to UV-C rays for 1000 hours. It was found that an addition of 5 wt.% TiO2 to PP matrix results in a 60% smaller decrease in Rg after 1000 h of exposure to UV-C than in the case of neat polypropylene. It was also found that the addition of TiO2 to the polypropylene matrix is more effective than TiO2 applied as a coating component. The Rg decrease after exposure is about 35% in this case. The research confirmed that TiO2 submicrometric particles seem to be a very good component in reducing the sustainability of polypropylene to UV radiation.