Showing papers in "Thermochimica Acta in 2021"

TL;DR: In this article, a back propagation neural network (BPNN) was proposed to simulate coal spontaneous combustion under six factors, including activation energy, void fraction, moisture content, air flow rate, stacking time and location of measuring point.

TL;DR: Based on the physical and chemical properties of municipal sewage sludge (SS) and coal slime (CS), the combustion behaviors of SS, CS and their blends were investigated by the thermogravimetric analyzer as mentioned in this paper.

TL;DR: In this article, a FeCu-montmorillonite (FeCu-MMT) is synthesized to boost the fire safety of epoxy resin (EP) at lower loading, which is modified by hexadecyl trimethyl ammonium bromide (CTAB) and Fe polycations for preparing multiply modified FeCuMMT.

TL;DR: In this paper, the authors compared five different kinetic analysis methods and found that the Kissinger-Akahira-Sunose (KAS) method is more accurate and is highly recommended.

TL;DR: In this paper, three kinds of n-alkanes were doped into a base asphalt binder and modulated differential scanning calorimetry (MDSC) analysis was performed on a series of binders containing increasing wax contents.

TL;DR: In this paper, a generic two-step mechanism for the hydration of K2CO3 was proposed, consisting of adsorption of water vapour and dissolution of ions from the initial phase (a wetting film) and formation of the hydrate crystal.

TL;DR: In this paper, microcrystalline cellulose (MCC) was extracted from Arundo donax L. (AD), using acid hydrolysis method, and successfully functionalized with amine groups.

TL;DR: In this article, the co-pyrolysis of municipal solid waste (MSW) and paper sludge (PS) with and without MgO was investigated, and the activation energy of the blends in the first step (

TL;DR: In this paper, isoconversional kinetic parameters were used to simulate the reaction progress under different isothermal and nonisothermal conditions, and it was shown that accurate simulations can be performed in a model-free way, i.e. without knowledge of the reaction mechanism.

TL;DR: In this paper, a semi-quantitative approach based on thermogravimetric analysis (TGA) and mass spectrometry (MS) coupled measurements was proposed for studying pyrolysis behavior of three kinds of biomass waste materials (spent coffee grounds, beech sawdust and wheat straw).

TL;DR: In this article, the formation enthalpies of CsPbX3 perovskites were investigated and it was shown that they are only barely stable from a thermodynamic perspective, consistent with the variation of Goldschmidt tolerance factor.

TL;DR: In this article, the authors demonstrated the fast transition of the initially stable solution to the region of unstable states above the liquid-liquid spinodal using the method of controlled pulse heating with microsecond time resolution.

TL;DR: In this paper, the authors studied the thermal decomposition of TATB (1,3,5-triamino-2,4,6-trinitrobenzene) and its formulation LX-17 at pressures from 0.1 to 7 MPa for both isothermal heating at 340 K and ramped heating at 1 to 6 K min−1.

TL;DR: In this paper, the effect of fillers on the crystallization and molecular mobility of polylactide (PLA) composites was investigated using both calorimetric and dielectric spectroscopy.

TL;DR: In this article, the authors investigated the inhibiting effect of two ionic liquids (ILs) on coal spontaneous combustion (CSC), coal samples were treated for various durations, and thermogravimetry-differential scanning calorimetry (TG-DSC) experiments were conducted at multiple heating rates.

TL;DR: In this article, a series of novel promising pyrazolyltetrazoles were studied using a number of complementary experimental (thermogravimetry, differential scanning calorimetry and manometry) and theoretical (quantum chemical calculations) techniques.

TL;DR: In this paper, the authors analyzed coal pyrolysis in low-oxygen conditions by thermogravimetric analysis and online FTIR and found that the pyrolation of candle coal occurs simultaneously at 3 %∼5 % oxygen concentration, while the intensity of oxidation reaction can still promote the coal self-heating.

TL;DR: In this article, the hydration heat of composite binder containing up to 70 % blast furnace ferronickel slag (BFFS) was determined at 25°C, 45°C and 60°C.

TL;DR: In this article, the effects of red phosphorus (RP), chitosan/lignosulfonate composite (CH/LS) and microencapsulated red phosphorus(MRP) on the flame retardance performance of epoxy resin were investigated in detail.

TL;DR: In this article, non-isothermal thermogravimetric studies have been carried out on several paracetamol formulations with the aim to predict their shelf-lives under variable storage conditions.

TL;DR: In this paper, the authors investigated the curing kinetics of four ductile epoxy/DAPE systems, including tetraglycidyl-4,4′-diaminodiphenyl methane (TGDDM)/DAPE, diglycIDyl 4,5-epoxycyclohexane-1,2-dicarboxylate (TDE-85)/TGPAP, and hydantoin epoxy resin (HER) systems, according to the Malek method, the four epoxy systems suit the Sest

TL;DR: In this article, Tetra-functional epoxy was reinforced with graphene oxide and p-Phenylenediamine functionalized graphene oxide (fGO) and FTIR and XPS analysis of fGO confirmed the attachment of amine groups on its surface.

TL;DR: In this article, the authors proposed six configurations for the shape of the heat sink and found that the semi-triangular-shaped heat sink was the best shape for reducing the highest temperature of a cylindrical heat generating body.

TL;DR: In this article, a general relation of the heating rate and sample mass dependence of the onset temperature is derived based on a conventional heat transfer model of a DSC, which can be used to correct the onset temperatures in the case of nonlinear behavior, which may occur in conventional DSC and Fast DSC (using chip sensors).

TL;DR: In this article, a computational tool of predicting nonisothermal kinetics is presented directly derived from an advanced isoconversional analysis, which assumes that a non-isothermal program can be decomposed in a series of infinitesimal isothermal steps.

TL;DR: In this article, a bio-based toughener for bisphenol A epoxy resin (DGEBA) is presented, where a dimer acid diglycidyl ester (DAGE) was synthesized from the dimers acid via a two-step method and applied as a biobased toughener for BGEBA.

TL;DR: In this article, spherical boron nitride (BN) nano particles were mixed and exfoliated to form hydrogen bonds between the particles, fluids, and polymer solutions containing glycerol, water, krytox oil, polyurethane solutions, and other similar substances.

TL;DR: In this paper, the influence of fly ash (FA) and slag (SL) on the nucleation and growth of cement hydrates at early-stage was investigated by analyses of instantaneous activation energy and microtopography.

TL;DR: In this paper, the effect of naphthalene superplasticizer (FDN) and polycarboxylate super-plasticizers (PCE) on hydration kinetics of ultrafine sulfoaluminate cement-based grouting material (USCBGM) was studied.

TL;DR: In this paper, the effects of FG on the combustion and agglomeration of nano-aluminum powder were studied, and the results showed that an appropriate amount of FG has a positive effect on the ignition delay time and flame propagation velocity.