Influence of chemically inert fillers on the efficiency of polyethylene inhibition by antioxidants

The influence of chemically inert dispersed fillers (Al 2 O 3 , SiO 2 ) on the efficiency of the polyethylene oxidation inhibition by commercial antioxidants (Irganox 1010, Neozon D) was studied. Introduction of chemically inert fillers into inhibited polymers alters the inhibitor distribution in the sample volume. The first fraction of the additive remains conventionally dissolved in the polymer (occurs in the dissolved state and in sorption sites), the second fraction is localized at the filler-polymer interface (separates out in the interfacial zone and accumulates in microcavities and voids of this zone), and the third fraction is adsorbed on the filler (forms an adsorption layer on the particle surface). As a result, the heat resistance of the filled polymer changes.