Depth of the permeation of the radiation-induced oxidation reaction in polymers in the presence of stabilizers

A model of radiation oxidation of polymers (PP, LDPE) in the presence of stabilizers, permitting to determine the layer in the polymer, in which reactions with participation of peroxide radicals are developed, is presented. When material is irradiated with a powerful radiation dose, the introduction of a stabilizer results in the increse of the reaction penetration depth. For lower dose rates the depth of radiation oxidation penetration can be considerably higher in the material stabilized as compared with pure polymer. Experimental testing of the scheme suggested for PP stabilized by ionol was carried out