Changes in physical and mechanical properties of the polymer based on polyurethane under the action of an accelerated electron beam

Change of strength, elastic properties and steam permeability of 0.1-0.3 mm thick film, prepared of linear polyurethane on the base of simple polyethers and diphenyldiisocyanate with high hydrophilic filler, under the effect of different types of ionizing radiation (accelerated electrons, γ-and β-radiation) within 0.1-60 Mrad range of absorbed doses, have been investigated. Change of film properties is shown to depend only on the value of absorbed dose, and it is the same for all radiation types. Maximal change of properties is observed within the range of absorbed doses from 2 to 5 Mrad. Data on polyurethane behaviour with different filler content are presented