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. Infrared spectra and XRD data recorded for the same paint specimens confirm the presence of the main components determined using thermal methods. This study has demonstrated the potential of thermal methods for the characterisation of ochre paints

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Abstract  

The use of thermal methods in the study of flammability and fire retardant action is discussed and compared with the standard test methods. This paper provides an overview with examples drawn from continuing studies on polyester resins, especially those containing halogenated monomers. Thermal analysis and cone calorimetry results are complemented byanalysis of the gaseous and solid products using a wide range of analytical methods.

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The aim of this paper is to review current applications for thermal methods within the pharmaceutical industry as well as to present some early work on potential applications for two new thermal methods: Hi-Resolution Thermogravimetric Analysis and Modulated Differential Scanning Calorimetry.

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Journal of Thermal Analysis and Calorimetry
Authors: Katalin Szécsényi, I. Esztelecki, and G. Pokol

Abstract  

In order to increase the nutrition value of bread, one of the most commonly used foodstuff all over the world, different additives are used in bread processing. In this paper we describe the thermal changes in bread and that of with 0.5% crude soybean lecithin additive. Their thermal stability has been investigated by TG, DSC and EGD methods. The thermal changes were also followed of soy products, lecithin and lysine, ingredients used as bread additives in order to check if they may suffer any thermal degradation during the baking process. The data obtained can be of use only for qualitative conclusions. According to the obtained data at the usual bread baking temperature only the additives in crust may partly decompose while in the crumb, at lower temperatures the additives, due to baking, are not damaged. The thermal methods give a possibility for rapid estimation of processes induced by heat effects in additives during the baking, and they are suitable to detect the changes during the bread-making procedure. However, they are neither suitable to provide any quantitative data on these changes nor facts affecting the nutrition value and of the bread.

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Abstract  

The SHS route is based on the well-known thermite reaction, in which a strongly exothermic reaction can sustain itself and propagate in the form of a combustion wave until the reactants have been completely consumed. The successful application of the method to the synthesis of superconducting ceramics of stoichiometry RBa2Cu3Oy (R=Y, Er, Yb) is reported. The 123 phase was obtained when pellets of R2O3, BaO2 and Cu metal in the correct proportions were dropped into a heater held at 800°C in an oxygen atmosphere and left there for only 10 minutes. Thermal methods (DSC and DTA) are excellent techniques with which to investigate the dependence of the reaction on heating rate, atmosphere and starting composition.

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The synthesis of new ordered mesoporous adsorbents, specifically of the MCM-41 type, involves a step of thermal elimination of the template (a surfactant) where CRTA is shown to provide a 'soft chemistry' route. Once the mesoporous (i.e. 2 to 50 nm pore width) material is obtained, the pore size is determined by thermoporometry, a convenient application for low temperature DSC. Finally, the hydrophobic - hydrophilic properties of the pore walls are explored by immersion microcalorimetry in water.

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Abstract  

Thermoplastic masterbatches are a complex blend of the base thermoplastic resin, a pigment and a range of additive materials. End use applications of masterbatches include agricultural film, packaging film, injection moulding of small and large bottles, boxes and crates and extrusion of pipe and sheet. Thermal analysis is a very useful tool for the characterisation of the physical properties of both masterbatches and finished product. This report will show the use of differential scanning calorimetry (DSC) to identify the melt profiles of masterbatches and to determine oxidative stability. Thermogravimetric analysis (TG) is very useful for the determination of the composition of masterbatches, for the study of batch to batch variability and for a comparison of a material with competitive products. The use of High Resolution TGA (Hi-Res TGA) will be shown to give greater resolution between overlapping weight loss steps leading to better quantification of components within the masterbatch when compared to conventional TG.

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