Synthesis and Evaluation of Multifunction Co - Polymer as Lubricating Oils Additives

α - Olefin derivatives are one of a variety of techniques have been employed in order to reduce problems caused by the crystallization of paraffin during the production and/or transportation and improved of properties of petroleum oils and derivatives. Addition of chemical modifications has been proved to be an efficient way for improving properties of lube oils. This article describes synthesis, characterization and perf ormance evaluation of copolymers, having as an initial step the synthesis of the alkyl methacrylate monomers by esterification of methacrylic acid (MA) with C 16 fatty alcohol. The alkyl methacrylate monomer was polymerized with α – olefin C 16 (1 - Hexadecene) to give copolymer then reacted with vinyl acetate monomer to give finally graft copolymer. The prepared graft copolymer was characterized by FT - IR, 1 HNMR spectroscopy, and gel permeation chromatography (GPC), and use to improving the properties of differe nt types (high and low viscositys) of Egyptian lubricating oils. Lubricating oils with different concentrations of graft copolymer (1000, 3000, 5000 and 10000 ppm) were investigated by pour point depressant (PPD), viscosity index (VI) and rheological measu rements (RM). The lubricants formulated with chemically modified exhibit a large reduction in the pour point temperatures, good rheological behaviors and better friction and wear properties. Oil samples containing 5000 ppm of the graft copolymer show - 1 8 ̊ C reductions in their pour points and give good performances properties for this lube oils, thus establishing the large efficiency of the products synthesized in this work.