Showing papers in "Thermochimica Acta in 2000"

TL;DR: In this paper, the thermal properties of several imidazolium salts were investigated using DSC and TGA/SDTA data, and it was observed that aluminium catalyzes the decomposition of the salts containing the inorganic fluoride anions.

TL;DR: The results of the ICTAC Kinetics Project as mentioned in this paper have been used to forecast the tendencies for the future development of solid state kinetics, as well as the findings of the participants are compared.

TL;DR: The results of the ICTAC Kinetics Project have been discussed in this article, where the authors have applied various model-free techniques that employ multiple sets of isothermal or nonisothermal data obtained at different temperatures or/and at different heating rates.

TL;DR: In this article, the thermal decomposition of BH3NH3 was studied by thermogravimetry, differential scanning calorimetry (DSC), volumetric measurements and coupled TG/FTIR.

TL;DR: In this article, a simple and convenient method is proposed to verify the applicability of the Johnson-Mehl-Avrami (JMA) model as well as the basic assumptions of kinetic analysis.

TL;DR: Brown et al. as discussed by the authors discussed the results of the ICTAC Kinetic Analysis Project on the thermal decomposition of calcium carbonate in nitrogen and in vacuum and demonstrated that the kinetic description of the process depends strongly on the experimental conditions.

TL;DR: The computational stage of solid-state reactions as applied to the data sets of the ICTAC Kinetic Analysis Project is discussed in Part D of a discussion of the computational stage as discussed by the authors.

TL;DR: In this paper, a series of vegetable oils and oils derived from genetically modified vegetables were evaluated using pressure differential scanning calorimetry (PDSC) to illustrate the effect of high oleic and linoleic content on the thermal and oxidative behavior of these oils.

TL;DR: In this overview, new techniques and methods of thermal analysis are examined and directions of future progress are anticipated for its sound development.

TL;DR: In this article, thermal analysis of a commercial Portland cement blended with calcium carbonate was studied by thermal analysis, and the results indicated that TG and DTG curves are faster and more precise tools than DTA curves to identify and quantify all the main hydrated and carbonated phases which are present in the pastes, especially in the case of this cement, the total content of which cannot be estimated correctly by DTA as hydration proceeds.

TL;DR: In this paper, the role of extended crystallographic structures in controlling the course of the bond rearrangements that occur during the conversion of a solid reactant into solid products is discussed.

TL;DR: In this paper, Bone samples of different origins and two bone substituent materials were studied with modern solid-state chemical methods: combined thermogravimetry-differential thermal analysis-mass spectrometry (TG-DTA-MS), X-ray powder diffraction (synchrotron), and infrared spectroscopy.

TL;DR: In this paper, the authors present the kinetic results computed for a hypothetical simulated process and experimental data for the thermal decomposition of calcium carbonate and ammonium perchlorate. But the results show that model-fitting techniques are successful in correctly describing the decomposition when assuming multi-step kinetic models, and the results indicate that proper consideration of the experimental conditions at which the reaction has been investigated should be taken into account for a correct interpretation of kinetic data of solid-gas reactions.

TL;DR: In this article, the authors used differential scanning calorimetry (DSC) to determine curing conditions for phthalonitrile functional polybenzoxazines and achieved high thermal stability with temperature at 5% weight loss up to 450°C for monofunctional benzoxazine-based polymers.

TL;DR: In this paper, the relationship between the relative fraction of edge sites and the oxidation behavior of graphite was examined by thermal gravimetric analysis (TGA) and differential thermal analysis (DTA).

TL;DR: In this paper, the Clausius-Clapeyron equation was used to estimate the net isosteric heat of persimmon skin and pulp in the range of 20-70°C, to water activities (a w ) from 0.02 to 0.85.

TL;DR: In this paper, the effects of drying and thermal treatment of collagen can be observed by X-ray diffraction, the changes in the diffraction pattern relate to changes in axial packing of collagen molecules as dehydration occurs, the meridional diffraction series becomes truncated indicating induced structural disorder, the spreading of diffraction features indicate that the molecular orientation is altered for some of the collagen chains or portions of collagen chains within fibril.

TL;DR: In this article, an adiabatic testing procedure for determining the self-heating propensity of coal has been evaluated using New Zealand coals and the results showed that the repeatability of the selfheating rate (R-70), obtained by the method, is less than +/- 5% of the average value for tests performed consecutively over 3-4 days.

TL;DR: The authors showed that hot water washing of large (0.5-1mm) straw char particles is less effective for ash removal than straw washing, independently of the temperature and the atmosphere where chars were formed.

TL;DR: In this article, a new expression for configurational partition function as well as the excess Gibbs energy of liquids and their mixtures have been derived from statistical thermodynamics based on the basic feature of liquid molecules.

TL;DR: In this paper, the authors investigated the influence of temperature, oxygen partial pressure, inert gas flow rate, and chemical impurities on the reaction kinetics of endothermal dissociation of zinc oxide into its elements and exothermal hydrolysis of zinc.

TL;DR: In this article, a new scheme of thermal dissociation based on the dissociative evaporation of the reactant with simultaneous condensation of the low-volatile product has been invoked to interpret the kinetics of reduction of FeO, CoO, NiO and Cu2O by carbon.

TL;DR: In this paper, the synthesis of Cu 2 S from copper foils embedded in sulfur has been studied by DTA from 25 to 600°C with a heating rate of 10 K/min.

TL;DR: In this paper, the exotherms in the DSC analysis of wood and its components have been assigned using Akamatsu wood ( Pinus densiflora ). Analysis of wood powder indicated two exotherm at around 340 and 475°C.

TL;DR: In this article, the thermal properties of an epoxy-based underfill material developed for Intel flip chip packaging were characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), thermomechanical analysis, TMA, dynamic mechanical thermal analysis (DMTA), and DMA techniques.

TL;DR: In this article, the thermal decomposition of transition metal sulphates was studied by thermogravimetry in static air and the TG, DTG and DTA curves were obtained using a Hungarian MOM C-derivatograph.

TL;DR: In this article, the heat capacities of various liquids were determined with a high precision using differential scanning calorimetry, as implemented on a Setaram Micro DSC II calorimeter based on Calvet's differential detection of the heat flow rate in the measuring and reference vessels.

TL;DR: In this paper, the thermodynamic behavior of gum arabic and cashew gums was studied by differential scanning calorimetry and thermogravimetry (TG).

TL;DR: The interaction of a-amylase from Bacillus amyloliquefaciens with divalent calcium ion was studied by equilibrium dialysis, isothermal titration microcalorimetry, UV spectrophotometry and temperature scanning spectrophOTometry methods and the binding of calcium prevented from the spontaneous decrease in biological activity.

TL;DR: In this article, the transition from the less ordered nematic phase to the more ordered smectic-A phase, in liquid crystals that exhibit both phases (those with R =8 or 9), involves a transient phase of intermediate order.