m barari - Research Center of Polymer Synthesis, Division of Polymer Science and Technology, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
a Varamesh - Research Center of Polymer Synthesis, Division of Polymer Science and Technology, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
b Vafakish - Research Center of Polymer Synthesis, Division of Polymer Science and Technology, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
r Soleyman - Research Center of Polymer Synthesis, Division of Polymer Science and Technology, Research Institute of Petroleum Industry (RIPI), Tehran, Iran

Dialkyl maleate esters were grafted onto Atactic Polypropylene (APP) with an organic peroxide as initiator. Grafting was performed in batch system, melt state and a constant time ofreaction. The effect of variables such as temperature, monomer and initiator concentration on amountof grafting was studied. Qualitative and Quantitative analyses of grafted polymers were performed with IR spectroscopy. Investigation of the experiments showed that in the more concentrated monomerconditions, grafting degree is higher in the maleate ester which has longer alkyl chain. Thisobservation refer to more compatibility of the longer alkyl chain maleate ester in the polymer matrix. Thermal analyses of unreacted and grafted polymers were performed by DSC. The result of thermal analysis indicated that grafting of the monomers onto polymeric chain would lead to a decrease in amount of crystalinity

Atactic Polyropylene, Grafting , Dialkyl maleate