Heat capacity and other thermodynamic properties of linear macromolecules. IV. Polypropylene

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Abstract
The heat capacity of polypropylene from 0 K to 600 K is reviewed on the basis of measurements on 20 samples reported in the literature. The crystallinity dependence is critically evaluated and a set of recommended data for completely crystalline and amorphous polypropylene are derived. The effect of tacticity on the heat capacity is also evaluated. Entropy, enthalpy, and Gibbs energy functions are calculated. This paper is the fourth in a series of publications which will ultimately cover all heat capacity measurements on linear macromolecules.