New Oil Dra Polymer Research And Development

This article aims at a species DRA (drag reducing agents) of α—olefin polymerization. It's one of the most application as well as best efficiency and has characteristic of high molecular weight (beyond 1000,000),good oil dissolving as well as high drag reduction ability. At present drag reduction agent mainly is copolymers of alpha monoolefins. The polymerization process adopted by foreign companies comprises solvent polymerization and bulk polymerization. Polymers produced by bulk polymerization have merits including polymers' pureness, simple aftertreatment, improvement of molecule weight.The purpose of this paper is to introduce bulk polymerization adopted by polymerizing alpha olefins. The relationship between efficiency of drag reduction and factors was given by quadrature experiment of alpha olefin polymerization whose catalyst system was A — Al(Et)2Cl. The cocatalyst are B1, B2, B3 . Three new cocatalysts was confected in virtue of different cocatalyst activity, measuring polymer's efficiency of drag reduction by using circular track test, and experiments indicated polymer's efficiency of drag reduction whose cocatalyst is composed of high activity and low activity cocatalyst was 10% greater than whose cocatalyst is one simple matter.A synthesis method was developed to synthesize poly (α—olefin) from α—olefin monomer by utilizing Ziegler—Natta catalyst in this paper, we polymerize α—olefin polymerization by bulk polymerizatioa Furthermore, orthogonal experiments were introduced to evaluate the effect of four factors, Such as chain length in α—olefin, cocatalyst, mol ratio of catalyst to cocatalyst, concentration of catalyst, and the best synthesis conditions of the drag reducing polymer were optimized. C8, C10 mixed α—olefin is better than C8, C10 α—olefin for the drag reducing effect, and cocatalyst A3 is better than A1, A2 for the experimental results. The drag reducing rate is improving with the growing mole ratio of cocatalyst, and the reaction temperature varying in certain range does not affect much on the drag reducing performance. The best experimental condition was chosen: monomer—E2, the cocatalyst amount— A3, mole ratio between the two cocatalyst-K3, temperature—T3, the main catalyst amount -N1. The conclusion is based on polymer's efficiency of drag reduction, It can be seen clearly from the result of medium enlarged that 30 multiplier samples' efficiency of drag reduction is 48.65%, much higher than Currently DRAs.Fourier transform infrared spectrometry was employed to analyze three brands of drag-reduction agents. Consequently, the fundamental structures of the polymer contained were determined.The microstructure of alpha olefins polymers newly polymerized was characterized by ~1H—NMR. The molecular weight was determined by GPC and discussed the relationship between polymers' efficiency of drag reduction and molecular weight as well as molecular weight distribution.Drag reducing agent through molecular associations have high shear stability in turbulent flow was studied and found its shear stability in turbulent flow has been improved greatly. The process of emulsion polymerization is simple and the demand of its producing codition is low.