关键词: 粘度指数改进剂, 聚甲基丙烯酸酯, 齿轮油

Abstract: Using esterification products of methacrylic acid and high-carbon alcohols as polymeric monomer, viscosity index improvers for 75W/90 automotive gear oil were obtained by free radical polymerization. FT-IR technique was used to analyze the structure of the esterified products and the copolymers. The service performance of the prepared copolymer was investigated and an import product was used as reference. FT-IR results showed that acid or alcohol was not detected in the esterified product, so it could be used as monomer in the further polymerization reaction. Residue methacrylic acid esters were not found in the prepared copolymers, indicating the polymerization reaction was successful. Results showed that compared with import product, the prepared copolymers exhibited enhanced viscosity improved performance and good shear stability, besides, superior low temperature performance and good adaptability with various hydrogenated base oils of this product were also observed.

Key words: viscosity index improver, polymethacrylate, gear oil