Controlled transformation rate thermal analysis: an inverse method allowing the characterisation of the thermal behaviour of polyphosphate glasses

1998 ◽  
Vol 30 (5) ◽  
pp. 575-580 ◽  
Author(s):  
François Gomez ◽  
Pierre Vast ◽  
Frédéric Barbieux ◽  
Philip Llewellyn ◽  
Françoise Rouquerol
Keyword(s):  
Thermal Analysis ◽  
Thermal Behaviour ◽  
Inverse Method ◽  
Transformation Rate ◽  
Polyphosphate Glasses

Thermal Behaviour of Layered Double Hydroxides Studied by Emanation Thermal Analysis

2003 ◽  
Vol 90-91 ◽  
pp. 475-480
Author(s):  
Vít Dorničák ◽  
Vladimír Balek ◽  
František Kovanda ◽  
Eva Večerníková
Keyword(s):  
Thermal Analysis ◽  
Thermal Behaviour ◽  
Layered Double Hydroxides ◽  
Emanation Thermal Analysis ◽  
Double Hydroxides

Kinetic study by controlled-transformation rate thermal analysis of the dehydroxylation of kaolinite

Clay Minerals ◽  
1998 ◽  
Vol 33 (2) ◽  
pp. 269-276 ◽  
Author(s):  
P. Dion ◽  
J.-F. Alcover ◽  
F. Bergaya ◽  
A. Ortega ◽  
P. L. Llewellyn ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Vapour Pressure ◽  
Reaction Rate ◽  
Diffusion Mechanism ◽  
Transformation Rate ◽  
Elementary Processes ◽  
Precise Control ◽  
First Order ◽  
Temperature And Pressure ◽  
Kinetics Of

AbstractAlthough the kinetics of the dehydroxylation of kaolinite have been widely studied, there is no definitive explanation of its mechanism due to its dependence on a variety of parameters. In this study, the dehydroxylation of kaolinite has been studied using controlled-transformation rate thermal analysis (CRTA), allowing precise control of the reaction rate, and thus of both the temperature and pressure above the sample. Modelling of the experimental results obtained by CRTA as well as those from TEM and MAS-NMR show that two elementary processes (diffusion and firstorder) can occur in competition. At the start of the decomposition the diffusion mechanism is predominant, but as the reaction progresses, the first-order mechanism prevails. It would seem that the importance of each process depends, in particular, on the presence of defects as well as on the local vapour pressure.

scholarly journals SYNTHESIS, CHARACTERIZATION AND THERMAL BEHAVIOUR OF SOLID 2- METHOXYCINNAMYLIDENEPYRUVATE OF SOME BIVALENT METAL IONS IN CO2 AND N2 ATMOSPHERES

2018 ◽  
Vol 35 (4) ◽  
pp. 55
Author(s):  
Cláudio Teodoro De Carvalho ◽  
Adriano Buzutti De Siqueira ◽  
Elias Yuki Ionashiro ◽  
Massao Ionashiro
Keyword(s):  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Thermal Decomposition ◽  
Differential Thermal Analysis ◽  
Thermal Behaviour ◽  
Scanning Calorimetry ◽  
Bivalent Metal ◽  
Bivalent Metal Ions ◽  
Bivalent Metals ◽  
Cu And Zn

Solid State M-2-MeO-CP compounds, where M stands for bivalent metals (Mn, Fe, Co, Ni, Cu and Zn) and 2-MeO-CP is 2-methoxycinnamylidenepyruvate, were synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), elemental analysis and complexometry were used to establish the stoichiometry and to study the thermal behaviour of these compounds in CO and N atmospheres. The results were consistent with the general formula: M(L) ·H O. In 2 2 2 2 both atmospheres (CO , N ) the thermal decomposition occurs in consecutive steps which are characteristic of 2 2 each compound. For CO atmosphere the final residues were: Mn O , Fe O , Co O , NiO, Cu O and ZnO, while 2 3 4 3 4 3 4 2 under N atmosphere the thermal decomposition is still observed at 1000 º C.

scholarly journals Synthesis, Characterization and Thermal Analysis of Resins from Different Cardanol Based Dyes

2014 ◽  
Vol 2 (2) ◽  
pp. 176-179 ◽  
Author(s):  
Tapan K. Das
Keyword(s):  
Thermal Analysis ◽  
Thermal Behaviour ◽  
Acid Catalyst ◽  
Ftir Spectra ◽  
Cardanol Based Dye

Cardanol(Cashew phenol) is subjected to diazotisation with Aniline and m-Toluidine to get  monomers like Cardanol based dye from Aniline (CBDFA) and Cardanol based dye from m-Toludine (CBDFT). Such monomers have been condensed with formaldehyde in presence of acid catalyst to form resins. The resins have been characterized by FTIR spectra and their thermal behaviour have been studied.DOI: http://dx.doi.org/10.3126/ijasbt.v2i2.10544Int J Appl Sci Biotechnol, Vol. 2(2): 176-179 

Volatility Studies of Metal Chelates. IV*Thermal Behaviour of Copper(II) Chelates of Aryl β-Diketones

1979 ◽  
Vol 32 (2) ◽  
pp. 277 ◽  
Author(s):  
S Dilli ◽  
K Robards
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Aromatic Ring ◽  
Thermal Behaviour ◽  
Metal Chelates ◽  
Fluorine Substitution

The thermal stability and volatility of the copper (II) chelates of 38 aryl β-diketones have been examined by combined thermogravimetry and differential thermal analysis. Volatility is characterized by fluorine substitution (in R and R' of RCOCH2COR?), particularly in the alkyl (R) moiety of the β-diketone. When chlorine, bromine and methyl substituents are introduced into the aromatic ring (R'), there is a significant reduction in volatility. If R is CH3, thermal stability is markedly affected, especially when R' is C6F5.

scholarly journals Synthesis and thermal studies of solid state 2-chloro-benzylidenepyruvic acid and its compounds with sodium, aluminium (III), gallium (III) and indium (III) cations

2004 ◽  
Vol 29 (1) ◽  
pp. 31-40 ◽  
Author(s):  
G. Bannach ◽  
E. Schnitzler ◽  
C. B. Melios ◽  
M. Ionashiro
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Thermal Decomposition ◽  
Differential Thermal Analysis ◽  
Solid State ◽  
Chemical Analysis ◽  
Thermal Behaviour ◽  
Thermal Studies ◽  
X Ray ◽  
Derivative Thermogravimetry

The synthesis of sodium 2-chlorobenzylidenepyruvate and its corresponding acid as well as binary, binary together with it's acid or hydroxo-2-chorobenzylidenepyruvate of aluminium (III), gallium (III) and indium (III), were isolated. Chemical analysis, thermogravimetry, derivative thermogravimetry (TG/DTG), simultaneous thermogravimetry-differential thermal analysis (TG-DTA) and X-ray powder diffractometry have been employed to characterize and to study the thermal behaviour of these compounds. The results provided information concerning the stoichiometry, crystallinity, thermal stability and thermal decomposition.

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