Synthesis and Characterization of Iso-Undecenoic and
Iso-Undecanoic Acids Based Polyol Esters
Version 2 2017-06-23, 17:50
Version 1 2017-06-23, 14:33
Posted on 2017-06-23 - 17:50
The
polymerization of 10-undecenoic acid (UDA) was carried out
in the presence of montmorillonite K10 clay catalyst (5% of UDA) and
deionized water (2.5% of UDA) at a temperature of 250 °C in an
autoclave. The UDA polymerized product is a mixture of monomer acids
(47–51%), dimer acids (30–32%), and higher polymeric
acids (17–23%). The present study describes the isolation of
less valuable monomer acids fraction (iso-undecenoic acid) through
distillation from polymerization reaction product. This monomer acids
fraction was found to be a mixture of iso-undecenoic acid (93–96%)
and γ-undecalactone (4–7%) when analyzed by GC-MS. Monomer
acids fraction was hydrogenated to also give hydrogenated monomer
acids (iso undecanoic acids). Finally, the esterification of monomer
and hydrogenated monomer acids fractions were done by the reaction
with different polyols like neopentyl glycol (NPG), trimethylol propane
(TMP), trimethylolhexane (TMH), and pentaerythritol (PE). Physicochemical
and lubricant properties of all the synthesized polyol esters were
evaluated including density, kinematic viscosity, pour point, flash
point, thermal stability (TGA), oxidation stability (DSC), copper
corrosion, weld load, and wear. All the synthesized polyol esters
were found to be suitable as hydraulic fluids and automotive lubricants
base stocks. Comparatively the iso-undecenoic acid based polyol esters
were showed excellent pour point, viscosity-temperature properties,
and good thermal stabilities, while the iso-undecanoic acid polyol
esters showed good oxidation stability.
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Yasa, Sathyam Reddy; Krishnasamy, Saravanan; Kumar Singh, Raj; Penumarthy, Vijayalakshmi (2017). Synthesis and Characterization of Iso-Undecenoic and
Iso-Undecanoic Acids Based Polyol Esters. ACS Publications. Collection. https://doi.org/10.1021/acs.iecr.7b01760
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AUTHORS (4)
SY
Sathyam Reddy Yasa
SK
Saravanan Krishnasamy
RK
Raj Kumar Singh
VP
Vijayalakshmi Penumarthy
KEYWORDS
polyol estersNPGMonomer acids fractioniso-undecenoic acidPElubricants base stocksGC-MSDSC10- undecenoic acidTMPmonomer acids fractionTMHpolymerization reaction productiso undecanoic acidsTGAUDA polymerized producthydrogenated monomer acidshydrogenated monomer acids fractionsiso-undecanoic acid polyol esters