Journal of Thermal Analysis and Calorimetry

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

List of Papers (Total 568)

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 ...

Reinvestigation of the DyCl3–LiCl binary system phase diagram

The phase equilibria in the DyCl3–LiCl binary system were established on the basis of differential scanning calorimetry (DSC) measurements. One compound, namely Li3DyCl6, is formed in this system. It melts congruently at 768 K with enthalpy of 51.6 kJ mol−1. DSC curves for eutectic composition and for compositions close to eutectic (on the left and right side of eutectic) are ...

Study of PET fibres modified with phosphorus–silicon retardants

In this study, flame-retardant poly(ethylene terephthalate) (PET) fibres were produced using a high-temperature bath method similar to dyeing fibres with disperse dyes. A mixture of aqueous solutions of silicon and phosphorus compounds was used as the flame retardant. Samples of the modified fibres were examined by thermogravimetric analysis. The residue left after limited oxygen ...

Selected quality properties of lipid fraction and oxidative stability of dry dog foods under typical storage conditions

Selected quality and oxidative stability parameters of the lipid fraction were analyzed in four complete dry dog foods with different main animal-derived ingredients. The measurements were taken at the time of bag opening and repeated after 7 months of continuous storage in normal room conditions. Fatty acid (FA) content and acid value (AV) were determined, followed by subsequent ...

Application of microemulsion method for development of methanol steam reforming Pd/ZnO catalysts

Thermal decomposition of palladium acetylacetonate adsorbed on zinc oxide (ZnO), and the formation of palladium oxide (PdO) and palladium zinc alloy (PdZn) phases were studied. Two types of ZnO supports were prepared by the microemulsion method using different surfactants, i.e. hexadecyltrimethylammonium bromide (CTAB) and (Bis(2-ethylhexyl) sulfosuccinate sodium salt, AOT). The ...

Thermal and spectroscopic (IR, XPS) properties of lanthanide(III) benzene-1,3,5-triacetate complexes

The metal–organic frameworks of the formula Ln(bta)·nH2O where n = 3, 4, 5 or 6; bta = benzene-1,3,5-triacetate ion: [C9H9(COO)3]3−; Ln = La(III), Nd(III), Eu(III), Tb(III), Ho(III), Tm(III), Lu(III) were synthesized by the reaction of LnCl3·xH2O with ammonium salt of H3bta acid in water solution. Insoluble water compounds crystallize in the monoclinic or triclinic crystal system, ...

Application of thermal analysis techniques to study the oxidation/reduction phenomena during sintering of steels containing oxygen-sensitive alloying elements

For the consolidation of steel parts manufactured by powder metallurgy (PM) techniques, removal of the surface oxides covering metallic powder particles is a necessary prerequisite. In PM steels with conventional compositions, reduction of the oxides is easily achieved in traditional sintering furnaces. However, processing steels containing alloying elements with a high oxygen ...

Insight on thermal behaviour of new complexes of Ni(II), Cu(II) and Zn(II) with a bismacrocyclic ligand developed as biologically active species

A multi-component reaction involving metal ion, amines and formaldehyde has been used for a series of decaaza bismacrocyclic complexes M2L(CH3COO)4·nH2O [(1) M: Ni, n = 2.5; (2) M:Cu, n = 1; (3) M:Zn, n = 10; L:1,3-bis(N,N-1,3,6,9,12-pentaazacyclotridecane)-benzene] preparation. Elemental analyses, ESI-MS, IR, UV–Vis–NIR, NMR and EPR spectra, magnetic susceptibility at room ...

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 ...

Thermal analysis of the by-products of waste combustion

Every year, vast amounts of wastes are produced in households and in industrial facilities. Therefore, waste thermal treatment has become one of the most effective and popular methods of waste disposal and waste management. However, it inevitably leads to the creation of solid by-products, as ash and slag often containing substances which are toxic and harmful for environment. ...

Study of thermal properties of polyethylene and polypropylene nanocomposites with long alkyl chain-substituted POSS fillers

The effect of incorporation of octakis({alkyl}dimethylsiloxy)octasilsesquioxanes molecules with n-octyl, n-octadecyl and 4-methyl-hexyl substituents on thermal properties of polypropylene (PP), low-density polyethylene (LDPE) and high-density polyethylene (HDPE) was investigated. Thermal properties of those composite materials were evaluated by means of the differential scanning ...

Synthesis, structure, and thermal stability of new scheelite-type Pb1−3x□xPr2x(MoO4)1−3x(WO4)3x ceramic materials

Monophasic polycrystalline samples of Pb1−3x□xPr2x(MoO4)1−3x(WO4)3x solid solution with limited homogeneity (0 < x ≤ 0.2222) and cationic vacancies (□) have been prepared by high-temperature annealing of PbMoO4/Pr2(WO4)3 mixtures composed of 40.00 mol% and less of praseodymium tungstate. Initial reactants and obtained ceramic materials were characterized by XRD, simultaneous ...

An isothermal titration calorimetry study of phytate binding to lysozyme

Isothermal titration calorimetry (ITC) was used to detect phytate binding to the protein lysozyme. This binding interaction was driven by electrostatic interaction between the positively charged protein and negatively charged phytate. When two phytate molecules bind to the protein, the charge on the protein is neutralised and no further binding occurs. The stoichiometry of binding ...

Influence of cytotoxic butyltin complexes with 2-sulfobenzoic acid on the thermotropic phase behavior of lipid model membranes

In the previous study, we showed that butyltin complexes with 2-sulfobenzoic acid (commonly referred to as BTsbz) exhibit a very wide biological activity. The BTsbz in vitro are very active cytotoxic agents against tumor cells—more effective than cisplatin and carboplatin (traditional anticancer drugs). These complexes are antibacterial agents against gram-positive and ...

Impact of adsorption of poly(aspartic acid) and its copolymers with polyethylene glycol on thermal characteristic of Cr2O3

The polymer structure impact on the adsorption layer conformation formed on the chromium (III) oxide surface was investigated. As adsorbates, three macromolecular compounds were tested: poly(l-aspartic acid) homopolymer and two block copolymers containing the poly(amino acid) segments as well as the poly(ethylene glycol) ones in the chain structure. Due to the ionic nature of the ...

Thermal properties of TEX decomposition or sublimation

TEX is a thermostable compound and less sensitive to external stimuli. It sublimates and decomposes at high temperature. The influence of DSC and TG measurement conditions and substance mass on the thermal decomposition of TEX was determined. It was observed that substance mass, pan type and fulfillment degree of pan influence the thermal decomposition and kinetic parameters of TEX ...

Effect of alkali and alkaline earth metals addition on Ni/ZrO2 catalyst activity in cellulose conversion

This work is devoted to the investigation of the effect of alkali and alkaline earth metals addition on Ni/ZrO2 catalyst activity in high-temperature cellulose conversion. The catalysts containing 20 % of Ni and 1 % of Ca, Mg, Na and K (calculated per amount of oxide) introduced on ZrO2 surface by impregnation method were prepared. The surface properties of the investigated samples ...

Effect of addition of BaO on sintering of glass–ceramic materials from SiO2–Al2O2–Na2O–K2O–CaO/MgO system

Glass–ceramic materials due to the various physical and chemical parameters have a more and more wide application in various areas of engineering. This paper presents a glass–ceramic material originating from the Al2O2–SiO2–Na2O–K2O–CaO/MgO modified by the addition of barium oxide. For the oxide composition which the molar ratio of SiO2/Al2O3 is constant and equal to 6.42, and ...

Does local cryotherapy improve thermal diagnosis similar to whole-body cryotherapy in spinal diseases?

Thermal imaging has been used for patients with spinal diseases who were qualified by their physicians for whole-body treatment or local cryotherapy. The experimental groups of patients consisted of 20 males aged 51.6 ± 9.0 (12 treated by whole-body cryotherapy and 8 by local cryotherapy). The distribution of the skin surface temperature was monitored by using a Thermovision Camera ...

Thermal analysis in foundry technology

TG–DSC thermal analysis involved two new BioCo foundry binders in the form of a composition with poly(acrylic acid) and modified polysaccharides (dextrin, sodium salt of carboxymethyl starch). Thermal analysis was conducted to determine the effect of the thermal decomposition conditions and polymer structure on the progress of degradation in terms of processes occurring in the ...

Kinetics of isothermal dehydration of equilibrium swollen PAAG hydrogel under the microwave heating conditions

The isothermal dehydration kinetics under microwave heating (MWH) of the equilibrium swollen poly(acrylic acid)-g-gelatin hydrogel (PAAG) was investigated. Dehydration kinetics curves have been measured for this recently synthesized and structurally defined hydrogel using a microwave thermogravimetric analyzer, within the temperature range from 323 to 353 K. It was found that the ...