Radiation-induced　grafting　of　sodium　styrene　sulfonate　and　acrylic　acid　onto　high-density　polyethylene　(HDPE)　membranes　was　studied　by　the　preirradiation　technique.　Grafting　was　carried　out　using　an　electronic　beam　from　a　2-MeV　accelerator　at　room　temperature.　The　effects　of　the　type　of　solvent,　inhibitor　concentration,　preirradiation　atmosphere,　monomer　concentration,　and　storage　time　of　preirradiated　HDPE　membranes　on　the　grafting　yield　were　investigated.　Easy　control　over　the　grafting　yield　was　achieved　by　proper　selection　of　the　reaction　conditions.　IR　spectroscopy　analysis　of　the　grafted　membrane　confirmed　the　existence　of　sulfonate　and　carboxylic　acid　groups　in　the　grafted　membranes.　(c)　2006　Wiley　Periodicals,　Inc.