| 摘要 |
<p>Provided in the present invention application is a copolymer for use in a low-temperature diesel fluidity improving agent. The structure of the copolymer is as represented by formula (I), where n is an integer between 2 and 30, m is an integer between 2 and 20, k is an integer between 1 and 10, and R is an alkane having 8 to 20 carbons. Also provided in the present invention application is a method for synthesizing the copolymer. The method comprises the following steps: 1) synthesis of maleinamic acid: dissolving aliphatic amine and maleic anhydride at equimolar ratio into a solvent, heating to a temperature between 60°C and 120°C, refluxing for two to three hours, acquiring a reaction product, which is a mixture of maleinamic acid and a partially organic solvent; 2) synthesis of a terpolymer: adding in proportion the reaction product from step 1), ethylene, vinyl acetate, and a solvent into a polymerizer, reacting the copolymer acquired by synthesis for four to five hours under the effect of an initiator, where the molar ratio of three raw materials, namely ethylene, vinyl acetate, and meleiamic acid, is 6-20:1-5:0.05-0.1; and 3) distilling the polymerization solvent at a temperature between 60°C and 120°C, mixing the reactants with an aromatic solvent of a weight ratio between 45% and 60% to acquire the polymer. The copolymer reduces the condensation point and cold filter plugging point of diesels, provides for strong adaptability to diesels having high wax content, and obviates a need for compounding in allowing for great effects in lowering the condensation point and cold filter plugging point.</p> |
