Add time:08/21/2019         Source:sciencedirect.com

A new class of C22-dimer acid esters was synthesized from 10-undecenoic acid by montmorillonite K10 clay catalyzed polymerization to dimer acid followed by their esterification using straight and branched chain alcohols (C1 to C10). All the newly synthesized products were characterized by IR, 1H NMR, 13C NMR, ESI–MS and HPLC, and evaluated for their physicochemical and lubricant properties such as density, specific gravity, viscosity, pour point, flash point, thermal and oxidation stability, weld load, wear and copper corrosion. Structural features like chain length and branching of alcohols influence the physicochemical and lubricants properties of the C22-dimer acid esters. It was observed that the esters synthesized using branched chain alcohols showed lower pour point and higher oxidation stability than their counterparts synthesized using straight chain alcohols. Overall, the physicochemical and lubricants properties of all the synthesized C22-dimer acid esters indicate that they can be potential base oils for hydraulic, metal working fluids and low-temperature lubricant applications.

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