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Hot Embossing by Matthias Worgull

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3.9.1. Thermal Material Data

3.9.1.1. Density

The temperature-dependent density of a polymer can be calculated from the data of the p-v-T diagram as the inverse of the specific volume,

(3.40) where is the density at reference temperature T0 and α is the linear coefficient of thermal expansion.

The equation is only valid for the linear part of the p-v-T curves. This equation is therefore valid only for amorphous polymers in the solid state up to the glass-transition temperature and also above the glass-transition temperature. For semicrystalline ...

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