1Polymer Group, Faculty of Chemical Engineering, Isfahan University of Technology, Zip code 84154, Isfahan, I.R. IRAN
2Gamma Irradiation Center, Atomic Energy Organization of Iran, P.O. Box 11365-8486, Tehran, I.R. IRAN
Acrylamide was grafted in low density polyethylene during melt processing in the presence of a free radical initiator using a torque rheometer in a closed system. Effects of processing time, acrylamide and benzoyl peroxide concentrations were studied. FTIR studies revealed that the degree of grafting increased by an increase in acrylamide concentration. Maximum grafting was obtained at 7 minutes processing time and 1% (wt/wt) peroxide. Increase in acrylamide concentration led to reduction in melt flow index and increase in apparent melt viscosity.