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Abstract
The relative efficiency of grafting of acrylic acid (AA) in the surface layer and in the bulk of preirradiated polypropylene fibers was studied by combining the ATR and transmission IR techniques. At graft percentage from 41 to 98, the surface layer contains 2–3 times higher concentration of the grafted chemical groups than the fiber bulk. At 140% of AA, the surface of the host polymer becomes screened by the grafted material.