<span lang="EN-GB">Ternary Copolymers as Viscosity Modifiers and Potential Pour Point Depressants for Lube Oil

In the present study, ternary copolymers of allyl esters of carbon (C۶, C۸, and C۱۰) acids, butyl methacrylate, and α-methyl styrene were synthesized by radical polymerization and studied as viscosity additives and depressants for lubricating oils. The effects of the copolymerization conditions on the properties of the obtained copolymers were investigated. The composition and structure of the synthesized ternary copolymers were investigated using IR spectroscopy. The Molecular Mass Distribution (MWD) of the synthesized ternary copolymer samples was studied. The effects of the length of the alkyl radical in the allyl esters of carbon (C۶, C۸, and C۱۰) acids on the viscosity–temperature properties of I–۱۲А oil thickened with the use of copolymers were studied. An increase in the length of the alkyl radical from C۵ to C۹ leads to an improvement in the viscosity–temperature properties of the obtained condensed oil and an increase in the value of the viscosity index. The effect of the length of the alkyl radical on the thermal stability of the copolymers in petroleum oils was also studied. An increase in the length of the alkyl radical from C۵ to C۹ in the complex ether units contained in the copolymers decreases the thermal stability of the oil condensed with them. To study the depression properties of the synthesized copolymers, the freezing temperatures of samples prepared in I-۱۲A oil at concentrations of ۰.۵%, ۱.۰%, ۱.۵%, ۲.۵%, and ۳.۰% were measured. Allyl ethers of carbon (C۶, C۸, and C۱۰) acids, butyl methacrylate, and α-methyl styrene ternary copolymers are effective viscosity additives with high viscosity–temperature and depressor properties, as well as improving the thermal stability of lubricants.

کلیدواژه ها:

Carbon (C۶ ، C۸ ، and C۱۰) acids ، Allyl ethers ، Butyl methacrylate ، &alpha ، -Methyl styrene ، Viscosity additives ، Depressant