10-Undecenoic acid-based polyol esters as potential lubricant base stocks.

摘要

A new class of polyol esters were prepared by esterification of 10-undecenoic acid (UDA) with three polyols namely trimethylolpropane (TMP), neopentyl glycol (NPG) and pentaerythritol (PE) in 92-96% yields. The esters were characterized by IR, 1H NMR, HPLC and mass spectral studies. Polyol esters were evaluated for basic lubrication properties and found to be: viscosity at 40 degrees C, 11.2-36.1 cSt; at 100 degrees C, 3.2-7.3 cSt; viscosity index (VI), 162-172; pour point+3 to -36 degrees C; flash point, 254-296 degrees C. All the three polyol esters synthesized exhibited good thermal stability with TGA onset temperatures above 260 degrees C. The lubricating properties of the products compared well with polyol esters based on oleic acid.