Firdovsi Tataroglu Sejidov and Yagoub Mansoori
The paper aims to study the effects of introducing oxypropyl segments into the trimethylolpropane (TMP) esters along with lowering the linear chain length from C5‐C9 to C5‐C6 on…
Abstract
Purpose
The paper aims to study the effects of introducing oxypropyl segments into the trimethylolpropane (TMP) esters along with lowering the linear chain length from C5‐C9 to C5‐C6 on the properties of base lubricants.
Design/methodology/approach
Various amounts of oxypropylene segments were introduced into the TMP skeleton and obtained polyols subsequently esterified by pure C5‐, C6‐, and mixture of C5‐C6‐ aliphatic monocarboxylic acids of normal structure (SFAc mixture).
Findings
Introducing oxypropylene segments into TMP skeleton, along with lowering the carboxylic acid chain length from C5‐C9 to C5‐C6, ester base lubricants obtained improved mechanical and wear preventive characteristics.
Research limitations/implications
Because of complexity of obtained mixture, it was impossible to study the structure and composition of the obtained products by modern techniques such as high field NMR spectroscopy.
Practical implications
The obtained materials have high boiling points under reduced pressure (2 mmHg). Producing higher vacuums will make the distillation process easier.
Originality/value
This paper fulfils detail information on the experimentally preparation of oxypropylated TMPs as synthetic base lubricants. The synthesized compounds showed improved properties such as high viscosity at 100°C, low pour point, high flash point, and totally excellent viscosity‐temperature properties than simple TMP esters and some literature reported ester base lubricants.