Journal of Thermal Analysis and Calorimetry

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

List of Papers (Total 567)

Hydrotalcite-derived Co-containing mixed metal oxide catalysts for methanol incineration

The Co–Mg–Al mixed metal oxides were prepared by calcination of co-precipitated hydrotalcite-like precursors at various temperatures (600–800 °C), characterised with respect to chemical (AAS) and phase (XRD) composition, textural parameters (BET), form and aggregation of cobalt species (UV–vis-DRS) and their redox properties (H2-TPR, cyclic voltammetry). Moreover, the process of ...

Analysis of flammability and smoke emission of rigid polyurethane foams modified with nanoparticles and halogen-free fire retardants

Using one-step method, rigid polyurethane foams were made, modified with developed fire retardant systems containing halogen-free flame retardants and nanofillers in the form of multi-walled carbon nanotubes or nanoscale titanium dioxide. The materials were subjected to a test using a cone calorimeter and smoke-generating chamber, and selected samples were further analyzed via ...

New thermoplastic polyurethane elastomers based on aliphatic diisocyanate

New segmented polyurethanes (SPURs) were synthesized by one-step melt polyaddition from a poly(oxytetramethylene)diol of \(\overline{M}_{\text n}\) = 1000 g mol−1 (PTMO) or a poly(hexamethylene carbonate)diol of \(\overline{M}_{\text n}\) = 860 g mol−1 (PHCD) as soft segments, 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane (IPDI), and ...

Thermal and mechanical properties of chitosan nanocomposites with cellulose modified in ionic liquids

In this paper, ionic liquid treatment was applied to produce nanometric cellulose particles of two polymorphic forms. A complex characterization of nanofillers including wide-angle X-ray scattering, Fourier transform infrared spectroscopy, and particle size determination was performed. The evaluated ionic liquid treatment was effective in terms of nanocrystalline cellulose ...

A thermogravimetric study of thermal dehydration of copper hexacyanoferrate by means of model-free kinetic analysis

The kinetics of thermal dehydration of K2x/3Cu[Fe(CN)6]2/3·nH2O was studied using thermogravimetry for x = 0.0 and 1.0. Data from both non-isothermal and isothermal measurements were used for model-free kinetic analysis by the Friedman and KAS methods. The water content was determined to be n = 2.9–3.9, plus an additional ~10% of water, likely surface adsorbed, that leaves very ...

Thermal methods implementation in analysis of fine-grained rocks containing organic matter

The thermal methods, including TG and DSC techniques, were implemented to determine the composition of the fine-grained rocks with dispersed organic matter. The analyses were carried out in inert and oxidising atmosphere. The analysed samples represented Palaeozoic siltstones, shales, claystones and mudstones from Baltic Basin, Lublin Basin and Upper Silesian Coal Basin (Poland). ...

Investigation of hydration products of fly ash–slag pastes

The paper presents the results of the research identifying the hydration products present in hardened fly ash–slag pastes considered as alternative non-clinker binder. Thermal analysis (TG/DTG), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used as complementary methods. The pastes contained the binder made of two components: fly ash from circular ...

Identification of polymers by means of DSC, TG, STA and computer-assisted database search

This work is about the identification of polymers by means of differential scanning calorimetry (DSC), thermogravimetry (TG) and simultaneous thermal analysis (STA) involving computer-assisted database search. One general limitation depicted is the possibility of multiple interpretations of a single measurement signal which sometimes makes definite identification difficult. It is ...

Al2O3/Ni functionally graded materials (FGM) obtained by centrifugal-slip casting method

The fabrication and the characterization of Al2O3/Ni composites with a gradient distribution of the Ni particles are reported. The composites have been obtained by centrifugal-slip casting and subsequent sintering and had the shape of a hollow cylinder. TG/DTA analysis was done for the nickel powder with the addition of the dispersant used in centrifugal-slip casting as well as for ...

Thermo-derivative analysis of Al–Si–Cu alloy used for surface treatment

The only effective way to design, produce, analyse and optimise new and existing industrial thermal processes and also laser-based processes is to develop a quantitative knowledge and understanding of the dependence between temperature and time, which allow the desired forming of properties of the final products. The purpose of this paper was the performance of thermo-derivative ...

Effect of sisal fiber filler on thermal properties of bio-based polyurethane composites

This work is mainly focused on study of thermal and thermomechanical properties of obtained bio-based polyurethane (coded as bio-PU) composites via using different types of bio-components (bio-glycol, modified soybean oil and sisal fiber) in the procedure. The chemical structure, morphology and mechanical properties were also investigated and described in this manuscript in order ...

Thermal properties of group components of the pitch–PET compositions

The study results of thermal properties of group components insoluble in quinoline and toluene of pitch–polymer compositions by differential scanning calorimetry, physicochemical and thermal properties, and structure of pitch–polymer compositions were presented. For pitch–polymer compositions containing 10–50 mass% waste polymer, softening point, coking value, content of components ...

Thermal evolution of ladder-like silsesquioxanes during formation of black glasses

Pyrolysis of ladder-like silsesquioxanes in oxygen-free atmosphere leads to the formation of silicon oxycarbides (black glasses). Black glasses are materials of amorphous silica structure where some amount of O2− ions were replaced by C4− ions. This exchange leads to local increase in bonds density and therefore improvement in mechanical, thermal, and chemical properties. Thanks to ...

Effect of modified graphene and carbon nanotubes on the thermal properties and flammability of elastomeric materials

The paper presents the test results of the effect of modified graphene and multi-wall carbon nanotubes on the thermal and mechanical properties and flammability of acrylic rubber and styrene-butadiene rubber. The rubbers were cross-linked with the use of organic peroxide. Based on the test results obtained by optic and AFM methods, a relationship between the surface morphology of ...

Synthesis, thermal study and some properties of N2O4—donor Schiff base and its Mn(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes

The new hexadentate N2O4 Schiff base ligand from condensation of 2,4-hydroxybenzophenone and 1,3-propanediamine has been prepared in methanol and ethanol solutions. The Schiff base synthesized from EtOH contains half molecule of amine per one molecule of ligand in its structure. The complexes were synthesized from the direct reaction of this ligand and Mn(II), Co(II), Ni(II), ...

TG/DSC/FTIR/QMS studies on the oxidative decomposition of terpene acrylate homopolymers

The oxidative thermal stability along with the identification of the volatile decomposition products under heating of terpene acrylate homopolymers by using TG/DSC/FTIR/QMS-coupled method was presented. It was found that the decomposition of poly(geranyl acrylate) and poly(neryl acrylate) had quite different course as compared to the decomposition process of poly(citronellyl ...

Copolymerization and thermal study of the new methacrylate derivative of 2,4,6-trichlorophenol

In this study, 2,4,6-trichlorophenyl methacrylate (TClPhMA) was synthesized by the reaction of methacryloyl chloride with 2,4,6-trichlorophenol in the ice bath condition. The obtained monomer was extracted by chloroform and purified on a chromatography column. In order to confirm the chemical structure of the new compound, spectroscopic studies (ATR-FTIR, 1H NMR, 13C NMR and GC–MS) ...

Thermal analysis, phase transitions and molecular reorientations in [Fe(OS(CH3)2)6](ClO4)2

Thermogravimetric analysis connected with quadruple mass spectroscopy (TG/MS) for an identification of [Fe(OS(CH3)2)6](ClO4)2 decomposition products, carried out to determine its thermal stability, has indicated that the title compound does not change its mass till ca. 385 K. Above this temperature, it starts slowly to lose a part of (CH3)2SO ligands, which begins to form a liquid ...

Swelling effects in cross-linked polymers by thermogravimetry

The present study focuses on the mechanism of swelling and evaluates interactions between solvents of different chemical characters (polar—ethanol, nonpolar—n-heptane) and commercially available porous Amberlite polymers (XAD4, XAD16, XAD7HP) by temperature-programmed desorption (TPD). The first two polymers are the product of copolymerization of styrene and divinylbenzene. Despite ...

Viscosity and thermal conductivity of MgO–EG nanofluids

Nanofluids are a group of novel engineering materials that are increasingly being used, particularly in the processes of heat exchange. One of the most promising materials in this group is magnesium oxide–ethylene glycol (MgO–EG) nanofluid. The literature informs that this material is characterized by an significant increase in thermal conductivity with low dynamic viscosity ...

The effect of starch-g-copolymers structure on the oxidative behavior studied by the TG/DSC/FTIR-coupled method

The effect of starch-g-copolymers structure on the thermal decomposition course under oxidative conditions by using the simultaneous TG/DSC/FTIR technique has been investigated. To those studies, two types of starch-g-copolymers obtained under the graft copolymerization process of aromatic acrylate monomers such as phenyl acrylate and benzyl acrylate onto starch have been chosen. ...

Application of differential scanning calorimetry to study porous structure of hydrothermally modified silicas

The paper presents the studies on determination of physicochemical and structural properties of hydrothermally treated (HTT) silica gel Si-60, using the differential scanning calorimetry (DSC) and N2 adsorption methods. Modification was performed in overheated water vapours or under the liquid water layer using various sources of thermal energy (in the classical autoclave or in the ...

Thermal behaviour of antiproliferative active 3-(2-furanyl)-8-aryl-7,8-dihydroimidazo[2,1-c][1,2,4]triazin-4(6H)-ones

Thermal analysis is commonly used in the pharmaceutical field because it is an important tool in the solution of problems involving development, production and quality control of medicines. This paper presents the thermal behaviour of six anticancer active derivatives of 3-(2-furanyl)-8-aryl-7,8-dihydroimidazo[2,1-c][1,2,4]triazin-4(6H)-one. The samples were characterized by the ...

How to use thermal imaging in venous insufficiency?

This paper is intended to provide studies performed on usefulness of thermal imaging for the insufficiency of superficial veins in the lower limbs. The results are a continuation of the previous research and show a new way of analysis and better correlation between standard methods of parameters like duplex ultrasonography and parameters derived from thermal imaging. In particular ...