Lube-Tech


formulation of biolubricants. The polymerisation of vegetable oil fatty esters/acids can be performed using methods including cationic, free radical, ring-opening, metathesis, condensation. There are many examples of lubricant additive manufacturing by free radical polymerisation. The polymers synthesised using this method are highly branched having very high molecular weights. The atom transfer radical polymerisation (ATRP) method is followed to obtain polymers having narrow molecular weight distribution and low polydispersity index required for specific


PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE


No.143 page 5


applications. The macrostructure of the polymers, upon which their potential as biolubricants (additive/ base stock) depends, is determined also by the types of monomers and the conditions of polymerisation including reaction time, heating method (thermal, microwave), temperature, and control of the reaction (living polymerisation/atom transfer radical polymerisation). It was found that the antifriction performance increases due to incorporation of polar functionalities in VO skeleton. Homopolymer of VO and their copolymers with different functional


Figure 1: Epoxidation and carbonation of VO.


LUBE MAGAZINE NO.172 DECEMBER 2022


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