Plasma-induced graft-polymerization of polyethylene glycol acrylate on polypropylene substrates S. Zanini, M. Orlandi, C. Colombo, E. Grimoldi and C. Riccardi Eur. Phys. J. D, 54 2 (2009) 159-164 Published online: 14 November 2008 DOI: 10.1140/epjd/e2008-00217-9