Study On Synthesis Technology And Properties Of Ionomer Bonding Mediated Interpolymer Complexes Drag Reducer Based On Long Chain Methacrylate

In the world, pipeline transport is one of the five transportations such as railways, highways, waterways, and air transportation. To date, total mileage of pipe transport has exceeded the railway already. Especially for the oil industry,93 percent of the petroleum is transported by pipeline. However, most of the actual operation of pipeline transport has long distance, large diameter and high energy consumption, and for long-term service pipe which are aging and corroded, using the original design or increasing pressure can bring major safety problems. And now, addition of drag reduction agent is the most important technology to ameliorate or solve the above problems.Under the designed temperature condition, long distance pipeline transport should be pressurize by pump to maintain the differential pressure of the whole pipeline in a reasonable scope when the differential pressure below a certain designed value. It can be called the oil pipeline transport station-standing type continuous transmission mode. Oil-soluble drag reduction agent (DRA) is a type of functional compound that have an effect on decreasing friction resistance to improve the transporting amount or reducing the pressure to maintain the designed throughput when they are added into crude oil or petroleum products, a-alkene as one type of DRA has been widely used in the factual pipeline transport, and it can effectively solve the problem of friction resistance. However, because of its pectinate macromolecular structure, linear a-olefins would be easily broken and the effectiveness of drag reducing decreases when flow through high-speed rotating pump. Therefore the development of DRA both having properties of drag reduction and shear stability has been a research hot spot in oilfield chemicals.Based on the preliminary research, And copolymer of lauryl methacrylate was synthesized by emulsion polymerization, with 2-vinyl pyridine and methyl methacrylate for polar polymerization monomer. The viscosity of the polymers were tested, and the three main polymerization conditions, such as the proportion of initiator, reaction time, reaction temperature, were optimized using orthogonal test. Through the ionization processing preparation, the drag reduction agent (DRA) based on ion-dipole interaction was prepared, and the existence of ion-dipole interaction was proved by infrared spectrum (IR).And the molecular were designed by using molecular dynamics simulation method. Drag reduction rate of the two systems and the anti-shearing property were tested by a indoor test unit. And the effect of Reynolds number and molecular weight of the polymer on drag reduction rate were also investigated.The results showed that:Intrinsic viscosity of polymers and drag reduction properties formatted linear relationship, and the optimal polymerization conditions were obtained based on orthogonal test; ion-dipole or hydrogen bond interaction can form "ladder" shaped chain, thus it has the shear stability; the reaction engineering enlarged problems can be amplified when the reaction volume is enhanced; the increasing of molecular weight and the concentration distribution are beneficial to drag reduction; the ionomer system DRA have better drag reduction value compared with hydrogen bond system; with the increasing number of shear time, the drag reduction value of two kinds of DRA have different degree of decrease, and the ionomer system is more slowly. No matter from the drag reduction rate or the properties of anti-shearing, the ionomer system DRA performed better. So it has well potential of industrial application value.