Applications of Dilatometry

A typical length measurement by thermomechanical analysis, TMA (see Sect. 4.5), is shown in Fig. 4.17 on the change in dimensions of a printed circuit board made of an epoxy-laminated paper. Measurements of this type are important for matching the expansivities of the electronic components to be fused to the board, so that strain and 

Changes of Length with Temperature of an Epoxy Printed-circuit Board 

Example traces from the Perkin-Elmer Applications Laboratory 

The dilatometry at different pressures leads to a full p-V-T phase diagram. Linear macromolecules in the liquid state can reach equilibrium and have then been successfully described by a single p-V-T diagram. The semicrystalline and glassy 

High molecular mass, crystallized at high pressure. Very slow measurement to avoid superheating. 1.30 

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Pannetier and Souchay have reported the data below as an example of the application of dilatometry to kinetics studies. 

Thermomechanical analysis thus permits a quick comparison of different materials. As long as instrumental and measuring parameters are kept constant, quantitative comparisons are possible. In Sect. 6.5, some more detailed applications of dilatometry and thermomechanical analysis to melting and crystallization are collected, as well as a discussion of the analysis of materials under tension. 

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