Abstract: High efficient drag reducing agent was synthesized by bulk polymerization using TiCl4/MgCl2-Al(i-Bu)3 as catalyst and mixed 1-octene/1-dodecene long chain α-olefins as monomers．The effect of reaction conditions on the drag reducing efficiency of copolymer was investigated and optimum process parameters were obtained. The prepared copolymer was characterized by GPC, 1H-NMR, IR and its drag reducing performance was evaluated by a loop testing system. Test results showed that a polymer obtained at a 1-octene volume ratio of 33% having high molecular weight (Mw=6.58×106, Mn=2.41×106, Mw/Mn=2.73) was well polymerized, and its drag reduction rate at an added dosage of 0.01 Kg/m3 with diesel fuel was up to 52.3%, which indicated that the obtained polymer could be used as drag reducing agent for crude oil.

Key words: 1-Octene/1-Dodecene, copolymerization, drag reducing efficiency, characterization