Infrared study of the photochemical behaviour of aromatic poly(ether urethanes): Effect of various stabilizers

Abstract

The influence of various additives on poly(ether-urethane) UV stability is evaluated. The extent of the photo degradation has been studied by FTIR spectroscopy. The photo-stabilizer 2-hydroxy-benzophenone decreases the photo-oxidation on both hard and soft segment, whereas the effect of the phenolic antioxidant 2,6-di-t-butyl-4-hydroxytoluene is more significant on the soft segment. However, the effect of the nickel chelate, 2,2'-thiobis(4-t- octylphenolate)-n-butylamine of nickel, depends on the polyurethane nature.