Authors:A. Rekondo, L. Irusta, and M. Fernández-Berridi
The thermal behaviour of a new kind of hybrid system based on silanized poly(ether-urethanes) (SPURs) has been analyzed by
thermogravimetric analysis (TG). The influence of the chemical nature of employed alkoxysilanes, polyether diol molecular
weight and the physical state of the obtained hybrids (cured and non-cured) has been studied. The results show that in the
non-cured state, aminosilane-based systems present a higher stability compared with those based on isocyanatesilane. However,
in the cured state, both types of hybrids present a similar thermal stability, but much higher than their corresponding partners
before the curing process. The presence of the inorganic silica network improves the thermal stability of all the systems
Authors:Mihaela Frunza, Gabriela Lisa, M. Popa, N. Miron, and Denisa Nistor
The thermal behavior of the new inorganic-organic nanohybrid materials obtained by intercalation of chloramphenicol and salicylate
into layered double hydroxides (LDHs) by direct synthesis method, anion exchange reaction and the reconstruction method was
evaluated by dynamic thermogravimetric analysis in air, at heating rates of 5°C min−1. The XRD patterns of the samples are characteristic for those of well crystallized solids with layered double hydroxide structures.
The FTIR spectroscopy results show the presence of the organic compound within the network structure of the synthesized LDHs.
The kinetic parameters (reaction order (n) apparent activation energy (Ea) and pre-exponential factor (lnA) were calculated by the Coats-Redfern method. The compensation effects were determined.
Pyrolytic process has a promising potential for the environmentally friendly upgrading of lignocellulosic materials and plastic
waste. The co-pyrolysis of olive residue and poly(vinyl chloride) was investigated under nitrogen atmosphere by dynamic thermogravimetric
analysis in the temperature range of 300–975 K. Two main stages of mass loss have been evidenced by TG analysis. The first
occurs in the temperature range of 420–684 K, and the second occurs at 631–840 K. This research was focused on the interaction
between olive residue and poly(vinyl chloride) during the pyrolysis process. Discrepancies between the experimental and calculated
TG/DTG profiles were considered as a measurement of the extent of interactions occurring on co-pyrolysis. It was found that
reactivity of olive residue was increased in olive residue/PVC mixture. In addition, a kinetic analysis was performed to fit
thermogravimetric data, the mixture is considered as multistage process. A reasonable fit to the experimental data was obtained
for all materials and their mixture by isoconversional Friedman method.
Authors:S. A. Dauengauer, Yu. N. Sazanov, L. A. Shibaev, and G. N. Fedorova
The thermal transformations of a number of modelo-amic acids were investigated by thermogravimetric analysis (TG). The TG data pointed to cyclodehydration of the amic acids and accompanying thermal degradation processes. TG in combination with mass-spectrometric thermal analysis provided sufficient information for the description of these processes on both qualitative and quantitative levels.
The transition of cubic indium hydroxide to cubic indium oxide has been studied by thermogravimetric analysis complimented
with hot-stage Raman spectroscopy. Thermal analysis shows the transition of In(OH)3 to In2O3 occurs at 219 °C. The structure and morphology of In(OH)3 synthesised using a soft chemical route at low temperatures was confirmed by X-ray diffraction and scanning electron microscopy.
A topotactical relationship exists between the micro/nano-cubes of In(OH)3 and In2O3. The Raman spectrum of In(OH)3 is characterised by an intense sharp band at 309 cm−1 attributed to ν1 In–O symmetric stretching mode, bands at 1137 and 1155 cm−1 attributed to In-OH δ deformation modes, bands at 3083, 3215, 3123 and 3262 cm−1 assigned to the OH stretching vibrations. Upon thermal treatment of In(OH)3, new Raman bands are observed at 125, 295, 488 and 615 cm−1 attributed to In2O3. Changes in the structure of In(OH)3 with thermal treatment is readily followed by hot-stage Raman spectroscopy.
Authors:I. S. Aji, E. S. Zainudin, A. Khalina, S. M. Sapuan, and M. D. Khairul
composite prepared with thermoplastic material, knowledge of influential factors such as temperature is paramount. In most cases, thermogravimetricanalysis (TG) and differential scanning calorimetry (DSC) is employed to study such factors. They can help
Authors:Kia Angus, Paul Thomas, and Jean-Pierre Guerbois
temperature. The calcination process was characterised using thermogravimetricanalysis coupled with mass spectrometry (TG–MS) for evolved gas analysis; characterisation of the calcination products was carried out using X-ray diffraction (XRD
Authors:Fei-Xiong Chen, Cai-Rong Zhou, and Guo-Peng Li
Using the thermal analysis of the Differential thermal analysis (DTA) and ThermogravimetricAnalysis (TGA), the decomposition process was divided into three stages: the zero stage is the decomposition of impurities, and the mass loss in the first and
Authors:Hongbo Gu, Jin Mei He, Jun Hu, and Yu Dong Huang
degradation kinetics and mechanism of BO6 must be fully understood for successful use in manufacture and elevated temperature applications.
Thermogravimetricanalysis (TG) has been widely used to determine the kinetic parameters of the degradation