Showing papers in "Thermochimica Acta in 2006"

TL;DR: In this article, the authors summarize literature data on thermal decomposition of ammonium perchlorate and discuss the mechanism of the decomposition and various factors that influence the thermal decompositions of perchlorates.

TL;DR: In this article, the reduction of Fe3O4 by H2 in the temperature range of 210-950 °C was investigated and the results showed that the reaction rate is controlled by diffusion and SEM observations confirm the sintering of the reaction products.

TL;DR: In this article, the mechanism of thermal degradation of substituted polyhedral oligomeric silsesquioxanes (POSS) cages is studied in both inert atmosphere and in air, and the results show that Isobutyl and octyl substituted POSS undergo an almost complete evaporation when heated in inert atmosphere.

TL;DR: In this article, the effect of the addition of two different compatibilizing agents, maleic anhydride (MA)-grafted polypropylene (MAPP), to bio-flour-filled, Polypropylene and low-density polyethylene (LDPE) composites was investigated.

TL;DR: In this paper, the role and mechanism of action of boric acid and of coated ammonium polyphosphate (pure ammoniumpolyphosphates coated with THEIC) used as flame retardants in a commercial intumescent epoxy-based formulation using analytical techniques including thermogravimetric analyses (TGA) and solid-state NMR.

TL;DR: In this paper, the authors used DSC curves as an alternative method to determine the degree of N-acetylation (DA) in chitin/chitosan samples, based in both peak area and height of the decomposition signal.

TL;DR: In this article, the synthesis of poly(methyl methacrylate) (PMMA)/clay nanocomposites is described via two methods: in situ and emulsion polymerization.

TL;DR: In this paper, a simple method to prepare nanocrystalline hydroxyapatite (nHAP) is performed using a precipitation method assisted with microwave heating method, which can be reported notably with high reproducibility and productivity.

TL;DR: In this paper, the effects of the mixed proportion between coal and waste tyre on the combustion process, ignition and burnout characteristics were also studied by means of thermogravimetric analysis (TGA) carried out at 20kmin−1 in the temperature range from ambient temperature to 1273k.

TL;DR: In this paper, the effect of fiber treatments on thermal stability of flax fiber and crystallization of polypropylene composites was investigated using thermogravimetry (TG) analysis.

TL;DR: In this article, the curing reaction of stoichiometric and off-stoichiometric diglycidyl ether of bisphenol A (DGEBA) and 1,3-phenylene diamine (m -PDA) mixtures was studied by differential scanning calorimetry, thermogravimetric analysis and rheological measurements.

TL;DR: In this article, the results of thermal analysis measurements were processed using isoconversion techniques and a multistep reaction mechanism was proposed to describe the experiments, and the identified reaction steps were tentatively assigned to specific processes of CuO decomposition and diffusion of reacting species through amorphous and then crystalline Al 2 O 3 polymorphs.

TL;DR: In this article, high-resolution thermogravimetric analysis (Hi-Res TGA) is used to quantify the elastomer composition of SBR/NR in tyre formulations.

TL;DR: In this article, six inorganic compounds, i.e., Na2CO3, NaOH, Na2SiO3, TiO2 and HZSM-5, were investigated with regard to their catalytic effects on pyrolysis of three biomass species.

TL;DR: In this article, the curing kinetics of polyfunctional benzoxazine resins based on arylamine, i.e., BA-a and BA-35x, were investigated.

TL;DR: In this article, the oxidation reaction of aluminum nanoparticles with oxygen gas and the thermal behavior of a metastable intermolecular composite (MIC) composed of the aluminium nanoparticles and molybdenum trioxide are studied with differential scanning calorimetry (DSC) as a function of the size and size distribution of the aluminum particles.

TL;DR: In this article, the authors used high-temperature powder X-ray diffraction (HT-XRD) to characterize the thermal transformation from lanthanum hydroxide (La(OH)3) to Lanthanum oxide (La2O3) resulting in two successive endothermic effects, caused by a loss of water.

TL;DR: In this article, the experimental IR (infrared spectra) and differential scanning calorimetry (DSC) curves of Bi 2 O 3 -B 2 O3 glasses, containing 30-60% Bi 2O 3, have been investigated.

TL;DR: In this article, the authors used FTIR spectroscopy and time-of-flight (ToF) mass spectrometry to study thermal decomposition of three imidazolium-based ionic liquids, with 1-ethyl-3-methyl-imidazolate (emim) as the cation, and NO3−, Cl−, and Br− as the anions.

TL;DR: In this paper, a new temperature-modulated differential scanning calorimetry (TMDSC) technique is introduced, which is based on stochastic temperature modulation and has been developed as a consequence of a generalized theory of a temperature modulated DSC.

TL;DR: In this article, the influence of chain length of alkyl substituents on the imidazolium cation on the solubility of CO2 was investigated.

TL;DR: The kinetic properties of hexokinase was investigated in concentrated protein solutions (BSA) and it was found, that the quality of the measured kinetic data was independent of protein concentration in the investigated range (0–250 mg BSA ml −1 ).

TL;DR: Vyazovkin's model-free kinetic algorithms were applied to determine conversion, isoconversion and apparent activation energy to both dehydration and combustion of sugarcane bagasse.

TL;DR: In this paper, the authors used the non-isothermal isoconversional Wall-Flynn-Ozawa method on the TG/DTG curves to obtain the pre-exponential factor (0.10 − α ǫ − 0.70) for thermal degradation of corn, rice, potato and cassava starches.

TL;DR: In this paper, the activation energy was determined as 145kJ/mol for 8Al-3Fe2O3 thermite reaction, the value is comparable to the activations for diffusion of Al in FeAl2O4 and is less than the activation energies for diffusion in Fe3Al.

TL;DR: In this article, a chip calorimeter based on a commercially available vacuum gauge was used to study the melting of isothermally crystallized isotactic polystyrene (iPS).

TL;DR: In this paper, TGA has been used to obtain information on ignition and burnout characteristics of high ash coal (Ab. HAC) incorporating Fe2O3, MnO2 and BaCO3.

TL;DR: In this paper, the Vyazovkin model-free approach is applied to study non-isothermal decomposition kinetics of waste PET samples using various temperature integral approximations such as Coats and Redfern, Gorbachev, and Agrawal and Sivasubramanian approximation and direct integration.

TL;DR: In this paper, two kinds of amorphous zirconia gels, XZO 631 and 632 supplied by MEL Chemicals, and their thermal gravimetrical analyses were carried out DTG of the former sample showed two peaks based on decomposition of the sulfate species on the surface, the first peak at 680°C and the second broad one centered at 850°C.

TL;DR: In this article, the acid-base distribution of various ion-exchanged montmorillonites was assessed through thermal programmed desorption (TPD) of NH3 and CO2.