oxidative thermal degradation of polypropylenes and the influence of some zinc chelates

ABSTRACT

The effect of sane prepared zinc chelates, namely, bis[N-butyl salicylaldimino]Zn, bis[N-benzyl salicylaldimino] Zn, thiourea Zn chloride and bis[4-amino pent-3 on 2--anato] Zn, on the oxidation of polypropylene at high temperature was investigated. The Zinc chelates, functioned as antioxidants- for pelypropylene, although bis [N-butyl salicylaldimino] Zn showed no measurable effect. Mechanisms have been proposed to account for the role of these chelates as antioxidants