Microthermal analysis, methods

Apart from combined TA techniques (on-line or not) the actual trends in thermal analysis are the introduction of modulated and high-resolution techniques, hyphenated thermal analysis methods e.g. TG-FTIR, TG-MS, DSC-XRD, etc.), alternative heating modes, microthermal analysis methods, industrial standardisation and quality control. Modulation means a periodic perturbation of a temperature program. Temperature modulation finds application in DSC, TG, DETA, TMA and uTA. Temperature-modulated techniques, such as Modulated DSC (MDSC ) and Modulated TGA (MTGATM), broaden the insight into the material properties. The use of modulated temperature programs in thermal methods has been reviewed [37,37a]. 

In microwave thermal analysis (MWTA) microwaves heat the sample by direct interaction (rather than by conduction of heat as in conventional thermal analysis) and can penetrate up to about 2 cm [38]. This reduces temperature gradients in masses up to 0.5 g. The method allows the study of thermal and dielectric properties of materials. Microthermal analysis methods allow to reduce the amount of material observed and considerably increase the range of problems that can be tackled cfr. Chp.2.1.6.1). 

Microthermal analysis methods overcome some of the problems of ordinary thermal methods, namely long experimental time, sampling (especially for samples which are too small, embedded or difficult to extract), and lack of spatial resolution. Microthermal analysis thus provides ... 

By using microthermic analysis it has been shown to be possible to conduct specific examination of changes in adhesive/metal joining parts on real systems [19]. Consequently, there is a method available that can use non-destructive means to characterise a glue joint by thermo-analysis. 

The methods discussed in this book are differential photocalorimetry, differential scanning calorimetry, dielectric thermal analysis, differential thermal analysis, dynamic mechanical analysis, evcrived gas analysis, gas chromatography, gas chromatography (oml)ined with mass spectrometry, mass spectrometry, microthermal analysis, thermal volalilisalion, Ihermogravimetric analysis and thermomechanical analysis. 

Source From Microthermal field-flow fractionation New highperformance method for particle size distribution analysis, in J. Coll. Interf. Sci. ... 

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