Mutual radiation grafting process has been used to covalently link polymerchains of poly(acrylicacid) to polyurethane foam waste using ⁶⁰Co-gamma radiation source. Various experimental parameters were investigated in order to optimize the grafting process. The grafted samples have been characterized for water-uptake, surface morphology and thermal stability. Grafting extent increased with dose, dose rate and monomer concentration but decreased with increase in density of PU foam. The matrix grafted upto an extent of ~90% showed uptake capacity of 220mg/g (0.09mol of dye/mol of acrylic acid) for a monovalent dye (basic red 29) within 3h of contact time in a batch process.