Thermal Analysis and Differential Scanning Calorimetry

Differential Thermal Analysis and Differential Scanning Calorimetry 

It is the link with thermal energy which is responsible for the wide 

The present chapter concentrates on the basic features of the techniques and the use of commercial equipment to make various measurements. Theoretical considerations have been limited to setting out the essential ideas. In contrast experimental procedures are discussed at some length. It is not possible to derive explicit working equations which permit the interpretation of experimental data by anything approaching first principles. However, calibration may be used to circumvent limitations in the theory and forms the basis of all quantitative measurements. In this context it is important to remember that no determination can be more precise than the calibration and this remains true even with the use 

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P. J. Haines, M. Reading, F. W. Wilburn. Differential Thermal Analysis and Differential Scanning Calorimetry. InHandbookofThermal Analysis and Calorimetry, vol 1 Principles and Practice M. E. Brown, Ed. Elsevier Amsterdam, 1998 chapter 5. 

DIFFERENTIAL THERMAL ANALYSIS AND DIFFERENTIAL SCANNING CALORIMETRY... 

Thermal methods of analysis, including differential thermal analysis and differential scanning calorimetry (DSC)... 

Differential Thermal Analysis and Differential Scanning Calorimetry 809... 

Laye, P.G. 2002. Differential thermal analysis and differential scanning calorimetry. In, Principles of Thermal Analysis and Calorimetry (P. J. Haines, ed.), pp. 55-93, Royal Society of Chemistry, Cambridge. 

Many relatively slow or static methods have been used to measure Tg. These include techniques for determining the density or specific volume of the polymer as a function of temperature (cf. Fig. 11-1) as well as measurements of refractive index, elastic modulus, and other properties. Differential thermal analysis and differential scanning calorimetry are widely used for this purpose at present, with simple extrapolative eorrections for the effects of heating or cording rates on the observed values of Tg. These two methods reflect the changes in specific heat of the polymer at the glass-to-rubber transition. Dynamic mechanical measurements, which are described in Section 11.5, are also widely employed for locating Tg. 

Brown, M.E., Ed., Differential thermal analysis and differential scanning calorimetry, in Handbook of Thermal Analysis and Calorimetry Principles and Practice, Vol. 1, Haines, P.J., Reading, M., and Wilburn, F.W., Elsevier, Amsterdam, 1998, chap. 5. 

Simatos, D., Faure, M., Bonjour, E., and Couach, M. 1975. Differential thermal analysis and differential scanning calorimetry in the study of water in foods. In Water Relations of Foods, ed. R.B. Duckworth, pp. 193-209. New York Academic Press. 

Although the principal thermal analysis techniques are thermogravimetry, differential thermal analysis, and differential scanning calorimetry (see Chapter 1), there are a number of other thermal techniques, besides those discussed elsewhere in this book, that are useful for solving chemical and technological problems. Some of these methods are of recent development and hence little used at the present time, but they possess the potential for wider use in the future. Many of these techniques are employed to supplement or complement the three principal techniques of TG. DTA. and DSC, either in the simultaneous (single sample) or concurrent multiple samples) modes. 

Differential thermal analysis and differential scanning calorimetry... 

Differential Thermal Analysis and Differential Scanning Calorimetry can lead to an extreme distortion in the shape of the exotherm. 

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