Graft polymerization of acrylic acid from the monomer solutions in water, acetone and water–acetone mixture onto bisphenol-A polycarbonate (PC) was carried out by the method of preirradiation in air. Effects of dose, temperature and monomer concentration on grafting were investigated, the optimal values of these parameters are 150 kGy, 80°C and 50 wt%, respectively. Effectiveness of grafting as well as transparency, fragility, hydrophilicity and crosslinking of the modified PC depend on the monomer–solvent compositions used.