Journal of Thermal Analysis and Calorimetry

http://link.springer.com/journal/10973

List of Papers (Total 566)

Spectroscopic (IR, Raman) and thermogravimetric studies of 3d-metal cinchomeronates and dinicotinates

In this work, the thermal and spectroscopic properties of 3d-metal (Co, Cu, Zn, Mn, Ni, Fe) and sodium salts with cinchomeronic acid (3,4-pyridinedicarboxylic acid) (3,4pda) and dinicotinic acid (3,5-pyridinedicarboxylic acid) (3,5pda) were studied. The IR and Raman spectra were registered and analyzed in the range of 400–4000 cm−1. The thermogravimetric study of synthesized ...

Calorimetric study of Eu2O3–ZrO2 feedstock powders and sintered materials

The synthesis of ceramic materials based on europia–zirconia system and obtained by solid-state reaction in high-temperature vacuum press was investigated. Firstly, phase composition and calorimetric behavior of feedstock powders was investigated. The second part of the paper concerns the synthesis process of non-stoichiometric mixtures of feedstock powders prepared by four ...

Influence of initial assumptions on the kinetic models of CO2 gasification of chars and cokes in solid phase

Kinetic studies of CO2 gasification of different materials were carried out using the Geneva method in an apparatus for determining the reactivity of cokes. The main purpose of these studies was parallel analysis of the Boudouard–Bell (B–B) reaction progress on the basis of both solid-phase and gaseous products combined with the mass balance of the process. The kinetic equations ...

Effect of properties of the N,N-dimethylformamide + methanol and N,N-dimethylformamide + water mixtures on the solution enthalpy of cyclic ethers in these mixtures at 298.15 K

The enthalpies of solution of cyclic ethers [1,4-dioxane, 12-crown-4 (12C4), 15-crown-5 (15C5) and 18-crown-6 (18C6)] in N,N-dimethylformamide + methanol (DMF + MeOH) mixtures have been measured at 298.15 K. On the basis of the obtained data, the effect of the acid–base and structure–energetic properties of the DMF + MeOH mixtures on the enthalpy of solution of cyclic ethers in ...

Thermal properties of TRIM–GMA copolymers with pendant amine groups

The porous copolymers of glycidyl methacrylate crosslinked with trimethylolpropane trimethacrylate were prepared in the form of regular microspheres by suspension–emulsion polymerization. In order to obtain adsorbents bearing functional groups, the porous methacrylate network was modified by subsequent reaction with diethylenetriamine. The thermal behavior of the obtained material ...

Influence of thermal treatment conditions on efficiency of PFA/MCM-48 composite and CMK-1 carbon replica in adsorption of volatile organic compounds

The mechanism of thermal degradation of poly(furfuryl alcohol) (PFA) deposited on the MCM-48 mesoporous silica was studied. The behaviour of the thin PFA film homogeneously dispersed on the silica surface (the material with the real PFA/MCM-48 mass ratio of 0.06) was compared to that of the 3D structure of PFA completely filling the MCM-48 channels (the material with the real ...

The influence of substituents position on products of dinitrotoluene isomers initial thermal decomposition

Thermal decomposition of dinitrotoluene (DNT) isomers and formed products were studied. Initial stage of thermal decomposition was the field of interests because decomposition of even a few percent of a substance may cause hazard. The generation of impurities at the initial stage of decomposition was examined on the basis of the decrease of the original substance melting enthalpy ...

Synthesis, structure and properties of poly(ether-urethane)s synthesized using a tri-functional oxypropylated glycerol as a polyol

The main aim of this work was to obtain poly(ether-urethane)s using tri-functional polyoxyalkylene polyol (Rokopol G1000), which introducing the chemical cross-links into the structure of polyurethanes. Poly(ether-urethane)s were prepared using two-step method, called prepolymer method, which involves in the first step the reaction of 4,4′-diphenylmethane diisocyanate (MDI) and ...

Thermal dissociation in terms of the second law of chemical thermodynamics

Starting from the relationship between Gibbs free energy and equilibrium constant of a chemical reaction (ECCR) and taking into account its temperature dependence according to Kirchhoff, Eq. (12), we arrive at the three-parametric Eq. (26). In going this way, we employ the relationship between the ECCR and the degree of conversion of the solid phase using Eqs. (20) and (21). We ...

The influence of ilmenite mud waste on the hydration process of Portland cement

The paper presents the results of research on the influence of ilmenite mud waste coming from the production of titanium dioxide on the process of cement hydration by isothermal microcalorimetry. Quantitative analysis of the waste impact on hydration heat and kinetics has been conducted. The mud shows pozzolanic properties from the early hours after contacting the waste and cement ...

Thermal behavior, decomposition mechanism and some physicochemical properties of starch-g-poly(benzyl acrylate) copolymers

TG/FTIR/QMS-coupled method to study the thermal behavior along with the evolution of volatile decomposition products and thus the decomposition mechanism under inert conditions of some starch-g-poly(benzyl acrylate) copolymers was applied. Starch-g-poly(benzyl acrylate) copolymers under K2S2O8-initiated copolymerization process of benzyl acrylate monomer with gelatinized potato ...

Thermodynamic analysis of indexes of operation of the engine with direct fuel injection for idle speed and acceleration

Contemporary requirements for combustion engines are aimed mainly at obtaining significant parameter values of their operation at simultaneously low fuel consumption and reduced exhaust emission. Despite the fact that combustion engines utilize diverse load conditions, the idle speed share in the whole range of their operation is significant. The percentage of combustion engines ...

Mesophases of non-conventional liquid crystalline molecules

Two homologous series of triblock molecules of the H(CH2)n(CF2)6(CH2)nH and F(CF2)n(CH2)6(CF2)nF general formulas with n = 6, 8, 10, and 12 have been synthesized and investigated using two complementary methods: differential scanning calorimetry and polarized optical microscopy in order to investigate their thermal behavior, establish phase diagram, and calculate thermodynamic ...

Study on crystallization phenomenon and thermal stability of binary Ni–Nb amorphous alloy

In this paper, a ribbon of binary Ni–Nb amorphous alloy was prepared by the melt spinning technique. Glass transition and crystallization phenomenon of the alloy were investigated by differential scanning calorimetry. Thermal properties of the ribbon of binary Ni–Nb upon heating and cooling were analysed by DTA at a heating/cooling rate of 0.5 K s−1 under the purified argon ...

Yttria-stabilized zirconia–alumina composite sintering temperature effect on thermal diffusivity

Yttria-stabilized zirconia (YSZ) is one of the most common materials used for a ceramic top coat in the thermal barrier coating (TBC). The high operating temperature used in the gas turbine engines causes the stress between the top coat and the bond coat. The stress relaxation can be assured by modifications of YSZ. Hence, studies on how to modify the chemical and phase composition ...

Thermal diffusivity characterization of bond-coat materials used for thermal barrier coatings

Thermal barrier coatings (TBC) are the system build from ceramic insulation top-coat with internal bond-coat as an interlayer between ceramic and Ni-based superalloys substrate materials. The basic role of bond-coat is reduction of thermal strain between ceramic top-coat and metallic substrates. The second role is related to improving the oxidation resistance of metallic substrate. ...

Kinetics of melamine phosphate thermal decomposition in DSC studies

This paper presents the results of study of the kinetics of two-stage condensation of melamine orthophosphate to melamine pyrophosphate and subsequently to melamine polyphosphate. The investigations were conducted under non-isothermal conditions and at constant rate of sample heating. Five different heating rates were applied: 40, 20, 10, 5, 2 K min−1. The activation energy of the ...

Wood biomass characterization by DSC or FT-IR spectroscopy

The wood biomass obtained from four tree species: spruce, beech, willow and alder was studied. Sawdust obtained by sawing of wood was dried in a convective dryer at 80 °C, without drying-agent flow. The measurements taken with oven-drying method covered determination of initial moisture and its detailed changes during entire drying process. Both DSC curves and spectral data from ...

DSC and electrophoretic studies on protein denaturation of Anodonta woodiana (Lea, 1834)

The aim of this study was to examine the thermal denaturation properties of proteins from fresh and frozen pond mussels Anodonta woodiana by differential scanning calorimetry (DSC). The A. woodiana (Lea, 1834) mussels were collected from the bottom of a lake located in West Poland. Three parts of the mussel: adductor muscle (AM), foot muscle (FO) and part of internal organs (IO), ...

Thermal, spectroscopic (IR, Raman, NMR) and theoretical (DFT) studies of alkali metal complexes with pyrazinecarboxylate and 2,3-pyrazinedicarboxylate ligands

Pyrazinecarboxylic acid and its derivatives show biological properties (inter alia antimicrobial and antifungal). In the frame of this work, the salts of 2-pyrazinecarboxylic and 2,3-pyrazinedicarboxylic acids with alkali metal cations were synthesized as well as the spectroscopic (IR, Raman, NMR), theoretical [density functional theory (DFT)] and thermogravimetric studies of ...

Aggregation behavior of Triton X-114 and Tween 80 at various temperatures and concentrations studied by density and viscosity measurements

Measurements of density and viscosity for the aqueous solutions of the nonionic surfactants, Triton X-114 and Tween 80, have been taken in the temperature range T = 293–318 K at an interval of 5 K. On the basis of the obtained results, various parameters have been calculated and analyzed including concentration of surfactants in the bulk phase and temperature, for example volume ...

Oxidative stability of camelina (Camelina sativa L.) oil using pressure differential scanning calorimetry and Rancimat method

The camelina oil, registered in EU as Traditional Speciality Guaranteed, is an excellent edible oil rich in ω3 fatty acids, as well as a great raw material for biodiesel production. However, both variable seed quality and technological difficulties (cold pressing, no chemical refining procedure) exert an unfavorable impact on a final oil quality and its oxidative stability. ...