Thermal Stability of Alkylaromatics in Natural Systems: Kinetics of Thermal Decomposition of Dodecylbenzene

2002 ◽  
Vol 16 (4) ◽  
pp. 831-841 ◽  
Author(s):  
Françoise Behar ◽  
François Lorant ◽  
Hélène Budzinski ◽  
Emmanuel Desavis
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Natural Systems ◽  
Kinetics Of Thermal Decomposition ◽  
Kinetics Of ◽  
Thermal Stability Of

Thermal Stability and Kinetics of Thermal Decomposition for Protionamide

2007 ◽  
Vol 23 (09) ◽  
pp. 1459-1462 ◽  
Author(s):  
WANG Shao-Xu ◽  
◽  
◽  
ZHAO Zhe ◽  
TAN Zhi-Cheng ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Kinetics Of Thermal Decomposition ◽  
Kinetics Of

scholarly journals Thermal Stability and Kinetics of Thermal Decomposition of Statistical Copolymers of N-Vinylpyrrolidone and Alkyl Methacrylates Synthesized via RAFT Polymerization

2021 ◽  
Vol 2021 ◽  
pp. 1-12 ◽  
Author(s):  
Theodoros Gikarakis ◽  
Ioannis Pappas ◽  
Pothiti Arvanitaki ◽  
Ekaterini Pantazi ◽  
Eleftheria Mitsoni ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Raft Polymerization ◽  
Copolymer Composition ◽  
Kinetics Of Thermal Decomposition ◽  
Methacrylate Monomer ◽  
Hexyl Methacrylate ◽  
Decomposition Behavior ◽  
Kinetics Of ◽  
Alkyl Methacrylates

The thermal stability and the kinetics of thermal decomposition of statistical copolymers of N-vinylpyrrolidone (NVP) with the alkyl methacrylates, hexyl methacrylate (HMA) and stearyl methacrylate (SMA), were studied by Thermogravimetric Analysis (TGA) and Differential Thermogravimetry (DTG). Statistical copolymers of different compositions were studied, and their thermal decomposition behavior was compared to the corresponding homopolymers. The activation energies of the thermal decomposition were calculated using the Ozawa-Flynn-Wall, the Kissinger, and the Kissinger-Akahira-Sunose methodologies. The effects of the nature of the methacrylate monomer, the copolymer composition, and the rate of heating are discussed.

scholarly journals Thermal stability and thermal decomposition kinetics of Ginkgo biloba leaves waste residue

2018 ◽  
Vol 22 (2) ◽  
pp. 1059-1069 ◽  
Author(s):  
Changwei Zhang ◽  
Chengzhang Wang ◽  
Ran Tao ◽  
Jianzhong Ye
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Ginkgo Biloba ◽  
Soxhlet Extraction ◽  
Nucleation And Growth ◽  
Decomposition Kinetics ◽  
Ultrasound Extraction ◽  
Random Nucleation ◽  
Kinetics Of ◽  
Thermal Stability Of

Non-isothermal thermogravimetric (TG) analysis was used to investigate the thermal stability and kinetics of three types of Ginkgo biloba leaves. These three types of Ginkgo biloba leaves included: Ginkgo biloba leaves before enzymolysis and ultrasound extraction (G1), Ginkgo biloba leaves after enzymolysis and ultrasound extraction (G2), and Ginkgo biloba leaves after soxhlet extraction (G3). Thermogravimetric/dynamic thermogravimetric, (dynamic TG) experiments indicated that the thermal stability of G2 and G3 were weaker than G1. Kissinger, Flynn-Wall-Ozawa, Friedman, and Coats-Redfern methods were firstly utilized to calculate the kinetic parameters and predicted decomposition mechanism of G1, G2, and G3. The thermal decomposition of G1, G2, and G3 were all corresponded to random nucleation and growth, following the Avrami-Erofeev equation, and activation energy of which were 191.4, 149.9, and 201.6 kJ/moL, respectively. In addition, the thermal decomposition G1, G2, and G3 were endothermic, irreversible and non-spontaneous.

scholarly journals Thermal Stability and Kinetics of Thermal Decomposition of Salvianolic Acid B

2012 ◽  
Vol 70 (2) ◽  
pp. 212
Author(s):  
Shaoxu Wang ◽  
Zhicheng Tan ◽  
Ruxin Che ◽  
Yansheng Li
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Salvianolic Acid B ◽  
Salvianolic Acid ◽  
Kinetics Of Thermal Decomposition ◽  
Kinetics Of

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

Kinetics of Thermal Decomposition of Lime Stone

1967 ◽  
Vol 53 (7) ◽  
pp. 740-743 ◽  
Author(s):  
Kiyoshi SAWAMURA ◽  
Kazuichi MIZOGUCHI ◽  
Tetsuro HANADA ◽  
Kunihiko MAKINO
Keyword(s):  
Thermal Decomposition ◽  
Kinetics Of Thermal Decomposition ◽  
Kinetics Of ◽  
Lime Stone

Non-Isothermal Decomposition Kinetic of Polypropylene/Hydrotalcite Composite

2019 ◽  
Vol 19 (11) ◽  
pp. 7493-7501 ◽  
Author(s):  
Sheng Xu ◽  
Min Zhang ◽  
Siyu Li ◽  
Moyu Yi ◽  
Shigen Shen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Nitrogen Atmosphere ◽  
Heating Rates ◽  
Decomposition Reactions ◽  
Kinetic And Thermodynamic Parameters ◽  
Málek Method ◽  
Boundary Reaction ◽  
Phase Boundary Reaction ◽  
Thermal Stability Of

P3O5-10 pillared Mg/Al hydrotalcite (HTs) as a functional fire-retarding filler was successfully prepared by impregnation-reconstruction, where the HTs was used to prepare polypropylene (PP) and HTs composite (PP/HTs). Thermal decomposition was crucial for correctly identifying the thermal behavior for the PP/HTs, and studied using thermogravimetry (TG) at different heating rates. Based on single TG curves and Málek method, as well as 41 mechanism functions, the thermal decompositions of the PP/HTs composite and PP in nitrogen atmosphere were studied under non-isothermal conditions. The mechanism functions of the thermal decomposition reactions for the PP/HTs composite and PP were separately “chemical reaction F3” and “phase boundary reaction R2,” which were also in good agreement with corresponding experimental data. It was found that the addition of the HTs increased the apparent activation energy Ea of the PP/HTs comparing to the PP, which improved the thermal stability of the polypropylene. A difference in the set of kinetic and thermodynamic parameters was also observed between the PP/HTs and PP, particularly with respect to lower ΔS≠ value assigned to higher thermal stability of the PP/HTs composite.

scholarly journals Isothermal Vulcanization and Non-Isothermal Degradation Kinetics of XNBR/Epoxy/XNBR-g-Halloysite Nanotubes (HNT) Nanocomposites

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2872
Author(s):  
Seyed Mohamad Reza Paran ◽  
Ghasem Naderi ◽  
Elnaz Movahedifar ◽  
Maryam Jouyandeh ◽  
Krzysztof Formela ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Degradation Kinetics ◽  
Halloysite Nanotubes ◽  
Butadiene Rubber ◽  
Order Model ◽  
Scanning Calorimetry ◽  
Theoretical Methods ◽  
Vulcanization Kinetics ◽  
Kinetics Of ◽  
Thermal Stability Of

The effect of several concentrations of carboxylated nitrile butadiene rubber (XNBR) functionalized halloysite nanotubes (XHNTs) on the vulcanization and degradation kinetics of XNBR/epoxy compounds were evaluated using experimental and theoretical methods. The isothermal vulcanization kinetics were studied at various temperatures by rheometry and differential scanning calorimetry (DSC). The results obtained indicated that the nth order model could not accurately predict the curing performance. However, the autocatalytic approach can be used to estimate the vulcanization reaction mechanism of XNBR/epoxy/XHNTs nanocomposites. The kinetic parameters related to the degradation of XNBR/epoxy/XHNTs nanocomposites were also assessed using thermogravimetric analysis (TGA). TGA measurements suggested that the grafted nanotubes strongly enhanced the thermal stability of the nanocomposite.

Mechanism and kinetics of thermal decomposition of 5-benzylsulfanyl-2-amino-1,3,4-thiadiazole

2005 ◽  
Vol 428 (1-2) ◽  
pp. 77-81 ◽  
Author(s):  
Xiao-Qing Shen ◽  
Zhong-Jun Li ◽  
Hong-Yun Zhang ◽  
Yi-Feng Zhou ◽  
Ke Liu ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Kinetics Of Thermal Decomposition ◽  
Mechanism And Kinetics ◽  
Kinetics Of

Thermal Breakdown Kinetics of 1-Ethyl-3-Methylimidazolium Ethylsulfate Measured Using Quantitative Infrared Spectroscopy

2017 ◽  
Vol 71 (12) ◽  
pp. 2626-2631 ◽  
Author(s):  
Jeffrey L. Wheeler ◽  
McKinley Pugh ◽  
S. Jake Atkins ◽  
Jason M. Porter
Keyword(s):  
Thermal Stability ◽  
Room Temperature ◽  
Computational Models ◽  
Elevated Temperatures ◽  
Molar Absorptivity ◽  
Ir Absorption ◽  
Optical Cell ◽  
Multiple Samples ◽  
Kinetics Of ◽  
Thermal Stability Of

In this work, the thermal stability of the room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][EtSO4]) is investigated using infrared (IR) spectroscopy. Quantitative IR absorption spectral data are measured for heated [EMIM][EtSO4]. Spectra have been collected between 25 ℃ and 100 ℃ using a heated optical cell. Multiple samples and cell pathlengths are used to determine quantitative values for the molar absorptivity of [EMIM][EtSO4]. These results are compared to previous computational models of the ion pair. These quantitative spectra are used to measure the rate of thermal decomposition of [EMIM][EtSO4] at elevated temperatures. The spectroscopic measurements of the rate of decomposition show that thermogravimetric methods overestimate the thermal stability of [EMIM][EtSO4].

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