Showing papers in "Thermochimica Acta in 2014"

TL;DR: In this paper, the authors present a set of recommendations for obtaining kinetic data that are adequate to the actual kinetics of various processes, including thermal decomposition of inorganic solids; thermal and thermo-oxidative degradation of polymers and organics; reactions of solids with gases; polymerization and crosslinking; crystallization of polymer and inorganics; hazardous processes.

TL;DR: In this paper, the degree of hydration assessment of cement paste from differential thermal and thermogravimetric analysis data has been performed by several authors that have offered a number of proposals for technical application to blended cements.

TL;DR: In this article, high-density polyethylene (HDPE) composites with modified boron nitride (mBN) fillers, functionalized with an organosilane, were fabricated through conventional melt-extrusion processing techniques.

TL;DR: In this paper, the cobalt-oxide/iron-oxide binary system was investigated and the results showed that the reaction enthalpy gradually decreases with increasing iron content, which is beneficial in terms of microstructural stability and related long-term reversibility of the chemical reaction.

TL;DR: In this paper, the thermal behavior of natural and hot-washed sisal fibers was investigated by thermal X-ray diffraction (TXRD), analyzing the crystallinity index (%Ic) of cellulosic samples, and by simultaneous thermogravimetric and differential thermal analysis coupled with Fourier-transformed infrared spectrometry (TG/DTA-FTIR), which allowed to examine the evolution of the main volatile compounds evolved during the degradation under inert and oxidizing atmospheres.

TL;DR: In this article, the effect of SiO 2 -coated modification on the stability and thermal conductivity of water-based graphene nanofluid was examined, and the results showed that the siO 2-coating modification significantly improved the hydrophilicity of graphene, as well as the stability of water based graphene nano-fluid.

TL;DR: In this article, the effects of silica nanospheres, multiwall carbon nanotubes (MWCNTs) and two types of their hybrid, i.e., H1 (80 ¼wt.% MWCNT) and H2 (50 ¼ ¼ t.% HWCNT), on the viscosity and density of distilled water were investigated, and the results showed that the least increase in the density of base fluid at high concentrations was for H1.

TL;DR: In this paper, the authors measured the enthalpy curves of nine phase change materials (PCM) in both dynamic and step mode using differential scanning calorimetry (DSC) and T-history method.

TL;DR: In this paper, a solution-based calorimetry approach for determination of the sublimation and vaporization enthalpies of low volatile compounds was proposed, which is based on the measurement of solution enthalpy of a molecule of interest in benzene and as well as measurement of molar refraction index for this molecule.

TL;DR: In this paper, a double parallel reactions random pore model (DRPM) was proposed to analyze the combustion behavior of coal, biomass, and coal blends with two rate peaks.

TL;DR: In this article, the authors measured the hydration heat evolution rate and quantity of composite binder and fly ash binder at 25, 45, and 60°C by isothermal calorimetry.

TL;DR: In this article, the thermal conductivity of boron nitride (BN) with polyvinyl alcohol (PVA) and/or Polyvinyl butyral (PVB) was investigated as a function of the degree of BN orientation, the number of hydroxyl groups in the polymer matrices and the amphiphilic agents used.

TL;DR: In this article, a new DSC measurement method was proposed to determine the ending melting temperature of phase change material (PCM) in order to find the starting melting temperature at which PCM starts melting.

TL;DR: Graphene oxide (GO) and graphene oxide modified with dodekylamine (org-GO) were combined with poly(l-lactic acid) (PLLA) to prepare new nanocomposites.

TL;DR: In this paper, nano-Si3N4 was employed to enhance thermal performance of phase change materials (PCMs), and a new formula was proposed to explain the relationship between the thermal conductivity and the latent heat.

TL;DR: In this paper, the thermal properties of oil-based nanofluids were investigated by measuring the effective thermal conductivity up to a maximum temperature of 210°C using the transient hot wire method.

TL;DR: In this article, low temperature properties of castor oil methyl esters were investigated using ASTM and differential scanning calorimetry (DSC) techniques and compared with WCOME.

TL;DR: In this article, a more realistic model is proposed where graphite oxide-like layers are also randomly interstratified in the graphite flakes, which explains the high oxygen to sulfur atomic ratios found in both elemental analysis of the neat materials and in the gas generated during the main exfoliation event.

TL;DR: In this paper, the impact of application methods of microcapsules containing n-octadecane as phase change materials (M-PCM) on the thermal properties and air permeability of modified textile fabric was analyzed.

TL;DR: In this paper, the critical temperatures of eight deep eutectic solvents (DES) were calculated based on the Eotvos empirical equation using the experimental data of the density and surface tension at various temperatures.

TL;DR: In this paper, a quantitative evaluation has been tried on the thermal lags of a fast-scan (≤104 K−s−1) microchip differential scanning nanocalorimeter (DSC).

TL;DR: In this paper, strategies to control thermally induced shrinkage in fly ash based geopolymers are investigated using low (100MPa) MPa and Wollastonite addition.

TL;DR: In this article, a shape-stabilized phase change material composite was prepared by impregnating the mixture of hydrated salts into porous silica matrix obtained by sol-gel process and further coated with polyvinylpyrrolidone to improve the thermal cycling performance.

TL;DR: In this paper, APPH has been synthesized and utilized to catalyze the curing of resorcinol-based phthalonitrile monomer, 1,3-bis(3,4-dicyanophenoxy) benzene (BDB), and bisphenol-A-A based phTHNitrile (BPH) monomer.

TL;DR: In this article, the thermal behavior of cork and cork chemical components was studied with coupled differential scanning calorimetry-thermogravimetric analysis (DSC-TGA) in order to gain insight into the role of the chemical components on the thermal degradation of Cork.

TL;DR: In this paper, deoxyribose nucleic acids (DNA) and caseins have been exposed to different heat fluxes under a cone calorimeter source and to the direct application of a propane flame.

TL;DR: In this paper, a novel ILA was synthesized using potassium carbonate as a salt with either glycerol or ethylene glycol as hydrogen bond donors (HBD), which exhibited similar physico-chemical properties to other solvents reported in literature.

TL;DR: In this paper, the influence of 10% of different functional mineral fillers viz. calcium carbonate (CaCO3), talc and wollastonite on the nonisothermal crystallization kinetis of poly(butylene terephthalate) (PBT) has been investigated by differential scanning calorimetry.

TL;DR: In this article, the thermal conductivity of magnetic nanofluids (MNFs) containing MFe2O4 (M = Fe and Co) nanoparticles suspended in deionized water are investigated in the absence and the presence of uniform magnetic field.

TL;DR: In this paper, a recycling process of iron from red mud by magnetic separation is proposed, in which iron oxide (Fe 2 O 3 ) in red mud transforms to magnetite (Fe 3 O 4 ) by anaerobic co-roasting with pyrite.