Article
Thermodynamics
Xingqin Fu, Qiuchen Yang, Yuejun Zhang
Summary: The thermal decomposition behavior of polyacrylamide poly (methacryloyloxyethyl trimethylammonium chloride-acrylamide) (P(DMC-AM)) was studied using TG and DSC, revealing that an increase in cationicity led to higher thermal stability for P(DMC-AM). The evolved gases during degradation were analyzed using TG coupled with FTIR and MS, and a possible thermal composition mechanism was proposed and validated, providing useful information for expanding innovative applications.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Analytical
Yitao Liu, Zhiyuan Zhao, Ruiyu Chen, Xiaokang Xu
Summary: This study investigates the thermal decomposition behaviors of polymers infiltrated with combustible liquids, providing a theoretical basis and guidance for predicting fire development, selecting or designing fire detection systems, and designing ventilation and fire extinguishing systems.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Physical
M. -S. Yacoub Elhadj, F. Xavier Perrin
Summary: Kaolinite-urea intercalates were prepared by dry grinding kaolin KGa-1b with urea using a planetary ball mill. The purification process involved repeated washings with isopropanol to remove excess urea. The proportion of intercalated and non-intercalated urea crystals was quantified using DSC and TGA analysis.
APPLIED CLAY SCIENCE
(2021)
Article
Engineering, Marine
Hector Alfredo Lopez-Aguilar, David Quiroz-Cardoza, Antonino Perez-Hernandez
Summary: This research focuses on the characterization of volatile compounds and their emission temperature during the pyrolysis of algal biomass. Different types of algal consortiums were studied, and it was found that the pyrolysis process has the potential to produce valuable products. The information obtained, such as the temperature at which volatility occurs, is useful in accessing the valuable compounds offered by algal biomass and converting biomass disposal into a sustainable source of raw materials through biorefinery concepts.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Mingtao Ding, Hao Su, Kuo Yang, Ye Li, Fangfei Li, Bing Xue
Summary: The aluminosilicate material with a layer expansion structure was prepared by urea intercalation and rapid calcination, with the U/P ratio controlling the degree of kaolinite layer expansion. The resulting material had a larger surface area and pore volume, higher negative charge on the surface, and increased methylene blue adsorption capacity compared to raw kaolinite.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Hao Wei, Yuhan Peng, Hua Huang, Jianqi Fan, Jiangkuan Xing, Kun Luo, Jianren Fan, Lu Dai
Summary: The performance of the Bio-CPD model on tobacco pyrolysis was assessed and large deviations were found. To improve the model, a grid-search optimization strategy was used to modify the kinetic parameters and develop the Toba-CPD model, which could well reproduce the pyrolysis of different tobacco types under a wide range of heating rates.
Article
Thermodynamics
Angran Zhao, Bowen Xiong, Yongqiang Han, Huiling Tong
Summary: The thermal decomposition processes of calcium nitrate tetrahydrate and calcium nitrite were investigated using various experimental methods. The results showed that calcium nitrate tetrahydrate releases water molecules within a certain temperature range, while calcium nitrate decomposes into different substances at high temperatures. The study revealed that excess oxygen does not affect these decomposition pathways.
THERMOCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Eva Mako, Zsofia Sarkadi, Zoltan Hato, Tamas Kristof
Summary: Experimental and molecular simulation analyses were used to study different types of kaolinite-APTES intercalation complexes, characterizing their real structures. The effects of various factors on the formation of these complexes were examined.
APPLIED CLAY SCIENCE
(2023)
Article
Polymer Science
Yankun Chen, Biao Wang
Summary: The thermal degradation behavior of polypropylene (PP) with 20 wt.% diatomite (DM) was investigated using TG-FTIR and GC-MS techniques. The addition of DM lowered the initial decomposition temperature of PP and resulted in the formation of more olefin degradation products. The catalytic effects of DM on the degradation of PP and the changes in PP chain scission pathways were observed.
Article
Biochemistry & Molecular Biology
Jing Zhou, Junlin Zhang, Shaoli Chen, Fengqi Zhao, Lili Qiu, Zihui Meng, Li Ding, Bozhou Wang, Qing Pan
Summary: This study conducted a comparative thermal research on molecular perovskite structures and investigated the factors influencing their thermal decomposition. The results showed that the choice of organic component and the substitution of cations can affect the stability and decomposition temperature of molecular perovskites. Furthermore, the kinetic parameters and synergistic catalysis mechanism of perovskite decomposition were studied using experimental and computational methods.
Article
Polymer Science
Monika Wojcik-Bania
Summary: This study assessed the thermal stability and degradation mechanism of a clay-polysiloxane nanocomposite for the first time. It was found that the addition of organo-montmorillonite nanofiller decreased the thermal stability of the nanocomposite, increased the number of thermal decomposition steps, and changed the degradation mechanism of the polysiloxane matrix.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Thermodynamics
Shanfeng Xu, Hui Xiao, Yuzhu Chen, Jing Li, Ke Jiang, Xie He, Jialin Zhang, Yongze Jiang, Xingyan Huang, Jiulong Xie, Jinqiu Qi
Summary: In this study, tea powder was used as a filler to produce low-formaldehyde-emission tea-based melamine-modified urea-formaldehyde resin. The thermal stabilities and performance of the resulting resin were characterized. The addition of tea powder showed positive effects on improving the properties of the plywood.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Review
Pharmacology & Pharmacy
Marek Wesolowski, Edyta Leyk
Summary: Using multiple measurement techniques ensures reliable interpretation of sample changes during heating, eliminating uncertainty and improving data interpretation. This paper briefly characterizes thermal analysis techniques coupled with spectroscopic or chromatographic techniques. Various design solutions for coupled thermogravimetry (TG) with infrared spectroscopy (FTIR), mass spectrometry (MS), and gas chromatography/mass spectrometry (GC/MS) systems are discussed. The importance of coupled techniques in pharmaceutical technology is highlighted, as they provide insights into the behavior and degradation of medicinal substances during heating, allowing determination of decomposition mechanisms and prediction of shelf life and storage conditions. In addition, design solutions for interpreting differential scanning calorimetry (DSC) curves using observation or simultaneous recording of FTIR spectra and X-ray diffractograms (XRD) are characterized, addressing the inherent non-specificity of DSC.
Article
Thermodynamics
Xu Jia, Jiao Xie, Xinhua Zhan, Xuedong Gong, Yuejun Zhang
Summary: The thermal decomposition mechanism of PDMDAAC was studied using quantum chemical calculation and experimental methods, revealing that the C-N bond in the cyclic five member ring is the most easily broken bond. The thermal decomposition process occurs in two stages, leading to gas products NH2Cl, CH4, C2H2, and C3H8.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Fangyu Fan, Zongling Yang, Xianjun Xing
Summary: Corn straw, as a large-yield agricultural waste, can be thermochemically treated for comprehensive utilization. Advanced techniques like TG-FTIR and TG-GC/MS were used to analyze the pyrolysis process more clearly. Results showed that the pyrolysis of corn straw leads to the production of various volatile organic compounds, with significant changes in composition at different temperatures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
