A5059087907- Thermal and Kinetic Analysis
- Free Radicals and Antioxidants
- Oxidative Organic Chemistry Reactions
- Catalysis and Oxidation Reactions
- Chemical Synthesis and Reactions
- Mesoporous Materials and Catalysis
- Asymmetric Synthesis and Catalysis
- Energetic Materials and Combustion
- Polymer crystallization and properties
- Inorganic and Organometallic Chemistry
- Polymer Science and PVC
- Catalytic Processes in Materials Science
- Atmospheric chemistry and aerosols
- Analytical Chemistry and Chromatography
- Epoxy Resin Curing Processes
- Fuel Cells and Related Materials
- Ammonia Synthesis and Nitrogen Reduction
- biodegradable polymer synthesis and properties
- Multicomponent Synthesis of Heterocycles
- Layered Double Hydroxides Synthesis and Applications
- Photochemistry and Electron Transfer Studies
- Biological Activity of Diterpenoids and Biflavonoids
- Phytochemicals and Antioxidant Activities
- Biochemical and biochemical processes
- Chemical Synthesis and Analysis
Hengshui University
2023-2024
Guangxi University
2018-2023
Nanning Normal University
2020
Chaohu University
2015
Taiyuan University of Technology
2008-2012
Korea University
2008
Korea Research Institute of Chemical Technology
2008
Butylated hydroxytoluene (BHT) is an excellent antioxidant widely used in food, polymer materials, and other fields. In order to understand the hazards of BHT, it necessary study its thermal stability, oxidation properties, reaction products. This paper investigated BHT's characteristics products using a mini-closed pressure vessel test (MCPVT), UV radiation method, iodometric gas chromatography-mass spectrometry (GC–MS). The MCPVT results showed that no chemical BHT was observed under...
Pressure and temperature behavior of the cinnamaldehyde oxidation process was determined using a custom-designed mini closed pressure vessel test (MCPVT), which is new method to investigate stability hazard assesment reaction. The products were analyzed by gas chromatography-mass spectrometry (GC-MS). results showed that stable under nitrogen atmosphere but very unstable oxygen atmosphere. initial iodimetry peroxide value could reach 139.44 mmol kg-1 when 308 K. kinetics studied versus time...
The thermal oxidation characteristics of abietic acid were investigated through tracing the process in custom-designed mini closed pressure vessel test under isothermal and step temperature conditions. Peroxide generation peroxide value measured using thin-layer chromatographic analysis iodimetry. primary product—peroxide—was separated by column chromatography with further structure characterization, its decomposition assessed via a differential scanning calorimeter (DSC). was mainly...
1,3-Butadiene is the simplest conjugated diene, which widely used in polymer materials, organic synthesis, and other fields. The investigation of its thermal stability oxidation characteristics necessary for production, transportation, use safety. pressure temperature behavior autoxidation reaction 1,3-butadiene with oxygen were determined using a custom-designed mini closed vessel test (MCPVT). effects free radical initiators CHP AIBN on investigated. decomposition products measured by...
Abstract 2,6-Di-tert-butyl-4-methylphenol (BHT) is an excellent antioxidant that easily oxidized to 2,6-di-tert-butyl-4-hydroperoxyl-4-methyl-2,5-cyclohexadienone (BHTOOH). For the safety of BHT production and usage, it meaningful study thermal stability decomposition properties BHTOOH. In this paper, BHTOOH were compared by mini closed pressure vessel test (MCPVT) differential scanning calorimetry (DSC). Their kinetics studied using thermogravimetric analysis (TGA). The products analyzed...
A self-designed reaction device was used as a promising equipment to investigate the oxidation characteristics and kinetics of rosin pentaerythritol ester (RPE) under UV irradiation. Photo-oxidation initial quantum yield (Φ) RPE were calculated. The product photo-oxidation reaction-peroxide analyzed by iodimetry. peroxide concentration is related light intensity (I) temperature (T), increasing T I would destabilize accelerating forming. follows pseudo first-order kinetics. relationship...
It has been a challenge to synthesize macrolide musk in excellent yields with high purity. KF-La/γ-Al2O3 catalyst was prepared from highly basic mesoporous framework using mild method. The employed for the synthesis of cyclopentadecanolide methyl 15-hydroxypentadecanoate. morphology and structure catalysts were characterized XRD, TG-DTG, SEM, EDX, TEM, BET CO2-TPD. results revealed that K3AlF6 LaOF are produced on surface KF-La/γ-Al2O3, LaO can promote dispersion KF Al2O3. Catalysts pore...
A self-designed mini gas–solid reaction device was applied as promising equipment to investigate the oxidation characteristics and kinetics of glycerol ester rosin (GER) under 254 nm UV irradiation in air.
It is a new attempt to investigate thermal stability and reactivity of four 3-Phenyl-2-propene compounds by MCPVT. The temperature initial oxygen absorption (Ta) rapid oxidation(TR) were calculated. Results showed that stable under nitrogen atmosphere. Ta cinnamaldehyde, cinnamyl alcohol, β-methylstyrene cinnamic acid 271.25K, 292.375K, 323.125K, 363.875K, the TR 301.125K, 332.75K, 357.91K, 385.375K, respectively. oxidation order was derived: cinnamaldehyde > alcohol β-Methylstyrene acid....
Abstract In this study, the oxidation characteristics of isoprene were investigated using a custom-designed mini closed pressure vessel test (MCPVT). The results show that is unstable and polymerization occurs under nitrogen atmosphere. Under an oxygen atmosphere, process was divided into three stages: (1) reacts with to produce peroxide; (2) Peroxides free radicals through thermal decomposition; (3) Free cause complex runaway reactions. conforms second-order reaction kinetics, activation...
A new attempt to investigate the thermal stability and reactivity of four 3-phenyl-2-propene compounds with oxygen by MCPVT has been reported.
On the basis of reaction (E)-4-methyl-1-phenylpent-2-en-1-one with chalcone and derivatives in ionic liquids [BMIM]PF 6 , highly regio-and diastereo-selective syntheses 1,5-dicarbonyls have been achieved.
<title>Abstract</title> 2,6-Di-tert-butyl-4-methylphenol (BHT) is an excellent antioxidant that easily oxidized to 2, 6-di-tert-butyl-4-hydroperoxyl-4-methyl-2, 5-cyclohexadienone (BHTOOH). For the safety of BHT production and usage, it meaningful study thermal stability decomposition properties BHTOOH. In this paper, BHTOOH were compared by mini closed pressure vessel test (MCPVT) differential scanning calorimetry (DSC), their kinetics studied using thermogravimetric analysis (TGA). The...
The reaction process of gaseous 1,3-butadiene following ultraviolet irradiation at the temperature range from 298 to 323 K under nitrogen atmosphere was monitored by UV-vis spectrophotometry. A mini-reactor used as a vessel and could be directly in spectrophotometer. We investigated reactivity kinetics non-UV UV evaluate its photochemical stability. second-order kinetic model with 50.48 kJ·mol-1 activation energy fitted data for irradiation, whereas first-order appropriate case energies...