Measurement and modeling of thermal conductivity for short chain methyl esters: Methyl butyrate and methyl caproate

2021 ◽  
Vol 159 ◽  
pp. 106486
Author(s):  
Xiong Zheng ◽  
Yanqiong Bao ◽  
Dan Qu ◽  
Yu Liu ◽  
Guangzhao Qin
Keyword(s):  
Thermal Conductivity ◽  
Methyl Esters ◽  
Short Chain ◽  
Methyl Butyrate ◽  
Methyl Caproate

scholarly journals Thermal vision of fracture behavior on acrylic composites

2021 ◽  
pp. 4-4
Author(s):  
Vanja Malisic ◽  
Marina Stamenovic ◽  
Slavisa Putic
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Alpha Phase ◽  
Elongation At Break ◽  
Flax Oil ◽  
Alumina Particles ◽  
Crack Zone ◽  
Thermal Vision

The aim of this work was to investigate thermal properties of acrylate-based composite combined with alumina-based particles. The composites were made of poly (methyl methacrylate) (PMMA) modified with dimethyl itaconate (DMI) as a matrix. As reinforcement were used alumina particles (Al2O3) and alumina doped with iron oxide (Al2O3-Fe) modified with 3-aminopropyl-trimethoxylane (AM) and flax oil fatty acid methyl esters (biodiesel - BD). According to the thermal conductivity measurements, the highest thermal conductivity values had the composite with alumina particles with the highest alpha phase content. With the addition of modified alumina particles to PMMA/DMI matrix mechanical properties were improved (tensile strength, modulus of elasticity and elongation at break). Composite with 3 wt. % Al2O3-Fe-AM particles had the most improved mechanical properties. It was noticed that this composite, compared to PMMA, had the lowest temperature in a crack zone (10.28%) and that is due to the better stiffness and highest thermal conductivity. The results indicated that the Sobel fractured surface area is related to the crack energy, which is reflected by the temperature of sample monitored by thermal vision.

scholarly journals An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles

2020 ◽  
Vol 52 (4) ◽  
pp. 457-467
Author(s):  
Vanja Malisic ◽  
Natasa Tomic ◽  
Marija Vuksanovic ◽  
Bojana Balanc ◽  
Zoran Stevic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Thermal Properties ◽  
Methyl Esters ◽  
Alpha Phase ◽  
Elongation At Break ◽  
Flax Oil ◽  
Alumina Particles ◽  
Crack Zone ◽  
Surface Modified

Thermal properties of acrylate-based composite combined with alumina-based particles were investigated. The composites were made of poly (methyl methacrylate) (PMMA) modified with dimethyl itaconate (DMI) as a matrix. Neat alumina particles (Al2O3) and alumina doped with iron oxide (Al2O3-Fe) modified with 3-aminopropyl-trimethoxylane (AM) and flax oil fatty acid methyl esters (biodiesel - BD) were used as reinforcement. Thermal conductivity measurements showed that composite with alumina particles with the highest alpha phase content had the highest thermal conductivity values. Mechanical properties (tensile strength, modulus of elasticity and elongation at break) were improved by the addition of modified alumina particles to PMMA/DMI matrix. The thermal properties are the most improved for composite with 3 wt.% Al2O3-Fe-AM particles that had the lowest temperature in a crack zone was noticed (10.28 %) compared to PMMA added due to the better stiffness and highest thermal conductivity.

scholarly journals Argon detector: alternative detection system for gas-liquid chromatographic analysis of short-chain organic acids

1978 ◽  
Vol 8 (4) ◽  
pp. 369-373
Author(s):  
N M Sullivan ◽  
J Mayhew ◽  
D DiTullio ◽  
F P Tally
Keyword(s):  
Thermal Conductivity ◽  
Organic Acids ◽  
Detection System ◽  
Anaerobic Bacteria ◽  
Short Chain ◽  
Gas Liquid Chromatography ◽  
Thermal Conductivity Detector ◽  
Flame Ionization ◽  
In Series ◽  
Alternative Detection

Two detection systems for gas-liquid chromatography were compared for the identification of metabolic end products (short-chain organic acids) from anaerobic bacteria. Argon and flame ionization detectors were connected in series with inert argon as the carrier gas for analysis of 35 stock strains and 148 clinical isolates. There was an excellent correlation between the argon and flame ionization chromatograms, and both were readily comparable to the thermal conductivity detector tracings published in the Virginia Polytechnic Institute manual. The linear response of the argon detector was examined by analyzing twofold serial dilutions of the short-chain organic acids and comparing the results to the very linear flame ionization detector. The argon detector was found to react with sufficient linearity within the organic acid concentration range normally obtained from anaerobic bacterial broth cultures. The argon detector, therefore, appears to be a viable alternative to the flame ionization and thermal conductivity detector systems in the identification of anaerobic organisms.

Determination of Small Quantities of Butyric Acid in Fatty Foods Application to Determination of Fatty Material of Butter

1970 ◽  
Vol 53 (5) ◽  
pp. 1082-1084
Author(s):  
A Karleskind ◽  
G Valmalle ◽  
J -P Wolff
Keyword(s):  
Butyric Acid ◽  
Chromatographic Method ◽  
Methyl Esters ◽  
Internal Standard ◽  
Fatty Material ◽  
Acid Decomposition ◽  
Naoh Solution ◽  
Methyl Butyrate ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for the determination of small quantities of butyric acid in fatty foods. After saponification of the fat in the sample and acid decomposition of the soaps formed, the fatty acids are steam distilled and butyric acid and other volatile acids are collected in dilute NaOH solution. The sodium salts formed are dried and then transformed directly into methyl esters. Methyl butyrate is determined by gas chromatography with an internal standard (methyl valerate).

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