RESISTANCE TO THE ACTION OF FILAMENTOUS FUNGI UPON SOME COATINGS MATERIALS

In order to determine the durability of polymer coatings using investigation techniques based on X-rays diffraction and combined techniques for thermal analysis (TG-DTA-DTG), one determined the changes of structure and their thermooxidative characteristics for 6 different types of paint having different characteristics, after subjecting them to UV radiation exposure (60W/m(2), between 300 and 400nm). The experimental results indicate that UV radiation induces various changes, depending on the type of paint, the paint topcoat films, the degree of crystallinity, its fragility and the exposure dose ( the latter being between 0,0005 and 0,0150%/Wh/m2). Additionally, one determined the effects of the biological action of some microorganisms which in certain cases is initiated and may also be enhanced in the presence of UV radiation.