Results 131 to 140 of about 509 (160)

Estolide Molecular Weight Distribution via Gel Permeation Chromatography

Journal of the American Oil Chemists' Society, 2019
AbstractUsing the universal calibration and the Mark‐Houwink equation (MHE) (), three batches of oleic estolide acids and their corresponding 2‐ethylhexyl esters were characterized using gel permeation chromatography (GPC). The MHE parameters in tetrahydrofuran (THF) at 40 °C were determined (for acids: α = 0.442 ± 0.003 and log10K=2.505 ± 0.007, for ...
Grigor B. Bantchev, Steven C. Cermak, Amber L. Durham, Neil P. J. Price   +3 more
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Synthesis and physical properties of estolide-based functional fluids

Industrial Crops and Products, 2003
Abstract Biodegradable, vegetable oil-based lubricants must have better low temperature properties as well as comparable cost to petroleum oil before they can become widely acceptable in the marketplace. These include low pour point temperature, low viscosity and viscosity indices that do not change over a wide temperature range. Our objective was to
Steven C. Cermak, Terry A. Isbell
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Soybean Oil Fatty Acid Ester Estolides as Potential Plasticizers

Journal of the American Oil Chemists' Society, 2019
AbstractFatty acid ester estolides were synthesized from soybean oil and evaluated for plasticizer functionality in poly(vinyl chloride) (PVC). The plasticization ability of the fatty acid ester estolides depends upon the molecular features such as polarity, molecular weight, and branching.
Lucas J. Stolp, Patrick J. Gronlund, Dharma R. Kodali   +2 more
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Estolide production with modified clay catalysts and process conditions

Journal of the American Oil Chemists' Society, 1997
AbstractThe 20% yields of estolides prepared from oleic acid and meadowfoam oil fatty acids are improved when the montmorillonite clay catalysts are modified to increase their activity. Changes we explored included acidifying the clay, treating to increase the surface area of clay to introduce new active sites, and decreasing the ionic character of the
Selim M. Erhan, Terry A. Isbell
openaire   +1 more source

Synthesis and physical properties of pennycress estolides and esters

Industrial Crops and Products, 2015
Abstract A new series of pennycress ( Thlaspi arvense L.) based free-acid estolides was synthesized by an acid-catalyzed condensation reaction, followed by an esterification reaction to produce the 2-ethylhexyl (2-EH) esters of the initial estolides. The physical properties of the estolides are highly affected by the length and unsaturation level of
Steven C Cermak, Amber L Durham, Roque L Evangelista   +2 more
exaly   +2 more sources

Methods for increasing estolide yields in a batch reactor

Journal of the American Oil Chemists' Society, 1995
AbstractEstolides are formed when the carboxylic acid group of one fatty acid forms an ester link at the site of unsaturation of another fatty acid. These compounds have the potential to be used in a variety of applications, such as lubricants, greases, plastics, inks, cosmetics, and surfactants.
Selim M. Erhan, Robert Kleiman, Terry A. Isbell   +2 more
openaire   +1 more source

Synthesis of triglyceride estolides from lesquerella and castor oils

Journal of the American Oil Chemists' Society, 2002
AbstractTriglyceride (TG) estolides were synthesized from the hydroxy moieties of lesquerella and castor oils with oleic acid. Complete esterification of the hydroxy oils was possible when a slight excess of oleic acid was employed (1 to 1.5 mole equivalents).
Terry A. Isbell, Steven C. Cermak
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Synthesis and physical properties of petroselinic based estolide esters

Industrial Crops and Products, 2011
Abstract A new series of petroselinic (Coriandrum sativum L.) based estolide 2-ethylhexyl (2-EH) esters were synthesized, as the capping material varied in length and in degrees of unsaturation, in a perchloric acid catalyzed one-pot process with the esterification process incorporated into an in situ second step to provide the coriander estolide 2 ...
Steven C. Cermak, Terry A. Isbell, Roque L. Evangelista, Burton L. Johnson   +3 more
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Estolides: From structure and function to structured and functionalized

Lipid Technology, 2008
AbstractOligomeric fatty acid esters, known as estolides, have been studied for close to a century. It has only been in the last few years, however, that efficient methods for preparing estolides have been developed that also allow some control over their molecular structures.
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Production of fatty acid estolides

2016
It has been found that esterification of a hydroxy-fatty acid by a lipase can be coupled with oleate hydratase (OHase) generation of that hydroxy-FA from an unsaturated FA with a cis C9-C10 double bond, e.g. oleic acid, in a single aqueous buffered reaction medium at low temperature,e.g. 30° C.
Boeriu, C.G., Todea, Anamaria, Arends, I.W.C.E., Otten, L.G.   +3 more
openaire   +1 more source