Showing papers in "Thermochimica Acta in 1976"

TL;DR: In this article, the authors used a differential scanning calorimeter (DSC) under isothermal conditions in the range 50-150°C to collect and process rate and integral heat of reaction data during cure.

TL;DR: In this article, the authors investigated the kinetics of the thermal decomposition of CaCO 3 in CO 2 using both dynamic and isothermal techniques and concluded that thermal transport rather than mass transport or chemical processes is rate determining.

TL;DR: In this article, a model of the isotropic liquid consistent with the viscosity data was proposed by analogy to the properties of fused aqueous ampiphilic mesophases, and the chain length dependence of the entropies of the crystal→G and G→V 2 or G→liquid transitions demonstrates disordering of the hydrocarbon chain is a stepwise process.

TL;DR: In this article, the authors demonstrate the possible use of differential scanning calorimetry (DSC) techniques for lower purity measurements and show that the applicable purity ranges depend on the instrumentation and data acquisition systems used.

TL;DR: In this paper, the formation constants of Cu(OH), Cu2(OH)2 and Cu3(OH4) were determined by potentiometric measurements and the enthalpy changes were obtained by direct calorimetry.

TL;DR: In this paper, a thermogravimetric analysis system was used to study the isothermal reaction of sulfur dioxide with limestones and dolomites at pressures from 1.01 x 10 5 Pa to 1.1 x 10 6 Pa (1 to 10 atm), and temperatures from 750 to 1050°C.

TL;DR: In this article, a technique for thermogravimetric analysis in which the magnitude of a rate-forcing variable such as temperature, pressure, gaseous flow-rate, etc., is jumped by discrete steps is described.

TL;DR: In this article, a detailed investigation of the mechanism of decomposition of dolomite in a specially designed thermal apparatus has been performed, and it has been shown that CO2 pressure affects both the initial decomposition temperature into MgO and CaCO3 and the final decomposition temperatures in opposite directions.

TL;DR: In this paper, the authors investigated the effect of radical chain inhibitors (nitrogen oxides) on the pyrolysis process of a burning cigarette and found that the rate of the reaction is controlled by chemical kinetic rather than mass transfer effects.

TL;DR: In this article, it was shown that the orthorhombic β-Rh2O3 is the most stable oxide under normal pressure, it decomposes irreversibly and probably topotactically to χ-Rh 2O3 at higher temperatures.

TL;DR: In this paper, it has been concluded that whereas the interaction of pyridine and β-picoline with methanol is attended by a decrease in self-association of the latter, that in methanoline + 1,4-dioxane points to a strong associative interaction in methenol.

TL;DR: In this paper, the effects of several experimental criteria including sample quality, heaing rate, sample size, sample vessel, test configuration, and thermodynamic interference are discussed, and the practicality of this method as a general standard procedure can only be realized when these effects are considered.

TL;DR: In this paper, the half width and shape index of a DTA curve of any first-order process in a uniformly temperated sample were transformed to the values of the corresponding rate curve at linearly increased temperature.

TL;DR: In this article, differential thermal analysis (DTA) was used to determine the autoignition temperatures of high explosives such as TNT, RDX, PETIN, and HMX.

TL;DR: In this article, the enthalpies of formation of the solid phases of the nickel-gallium system at 300 K and of the steel-coated nickel-germanium systems at 330 K were measured.

TL;DR: In this paper, the thermal decomposition of dihydrogen phosphates and arsenates was studied by thermal gravimetry and evolved gas analysis, and trends in the decomposition as a function of alkali metal and deuterium substitution were discussed.

TL;DR: Differential scanning calorimetry (DSC) in conjunction with X-rays and transmission electron microscopy were employed to elucidate the mechanism of amorphous to crystalline transformation in bulk electroless nickel (Ni-10.9 wt. % P) alloy as discussed by the authors.

TL;DR: In this article, the standard free energies of formation of zinc aluminate and chromite were determined by measuring the oxygen potential over a solid CuZn alloy, containing 10 at.−% Zn, in equilibrium with ZnO, ZnAl 2 O 4 + Al 2 O 3 (χ) and ZnCr 2O 4 + Cr 2O 3, in the temperature range 700-900°C.

TL;DR: In this article, the Picker dynamic-flow microcalorimeter, which is able to scan and record (in 20 min) the enthalpy of mixing directly as a function of concentration, has been investigated at 298.15 K by measuring the three standard systems: cyclohexane + n-hexane, benzene + cyclo hexane and carbon tetrachloride + benzene.

TL;DR: In this article, the decomposition of hydrated selenates of rare-earths and yttrium has been studied using thermogravimetry, differential thermal analysis and differential thermograves.

TL;DR: The machanisms of thermal decompositions have been studied of the following bismuth(III) salts: benzoate, salicylate, subbenzoate and subsalicylates.

TL;DR: In this article, the heats of mixing of liquid bismuth-gallium are measured by a high temperature Calvet calorimeter, combined with those of the phase diagram, enable a complete description of the thermodynamic properties of the system.

TL;DR: In this article, a thermal analysis of a mixture of La2(C2O4)3·10H2O and Co3O4 with a small amount of LaCoO3 was performed at a temperature lower than 800°C.

TL;DR: In this paper, three exploratory investigations have been performed to examine the recovery of oil from the Chattanooga black shale formation, showing that the maximum organic product release occurred at approximately 435°C and resulted in an oil of relatively low distillation range.

TL;DR: In this paper, the authors have gathered, critically evaluated, calculated, and tabulated thermodynamic properties and related equilibrium constants and standard potentials for compounds and aqueous species of scandium.

TL;DR: In this article, the thermal decomposition of basic lead carbonate, 2PbCO3 Pb(OH)2, is compared with the thermogram of normal lead carbonite PbCO 3.

TL;DR: In this article, the thermodynamic parameters for the chelation of cupric ion with 2,2′-dipyridyl have been determined at 25°C and I = 0.1 M. The data obtained are compared with those in the literature and the chelate effect of the heterocyclic diimine is described.