LLDPE film pre-irradiated by electron beam (EB) in air and argon was grafted in an aqueous acrylamide solution containing Mohr’s salt in the concentration range 0.0025-2%. The grafting rate and yield were strongly dependent on the Mohr’s salt concentration, mainly as a result of chain termination. The exponential grafting rate dependence on the pre-irradiation dose was quite insensitive to a hundred-fold variation in Mohr’s salt concentration.