Collect. Czech. Chem. Commun. 1983, 48, 1001-1006

Antioxidant activity of N-phenyl-1,4-phenylenediamine and its derivatives in tetralin

Miluše Prusíkováa, Jan Holčíkb and Jan Pospíšila

a Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, 162 06 Prague 6
b Research Institute of Organic Technology, 810 01 Bratislava


Using data on the uptake of oxygen in the oxidation of tetralin (60 °C, initiated with 2,2'-azobis-(isobutyronitrile)), structural effects of N-(4-subst.phenyl)-1,4-phenylenediamines (I) and N-(4-subst.phenyl)-N'-isopropyl-1,4-phenylenediamines (II) influencing the inhibition of the oxidation were determined. In both types of the antidegradants the antioxidant activity is unfavourably affected by the presence of the methoxy group in position 4 of N-phenyl. N-(4-Alkylphenyl) derivatives possess efficiency comparable to, or lower than, that of 4-phenyl derivatives. Compared with II, the antioxidant properties of diamines I are generally better.