Melting Behavior [76–84]
The melting of polymers is, in principle, a first order transition. Nevertheless, it is not possible to describe all the experimental observations, which have been made for polymer melts, in terms of equilibrium thermodynamics. Due to the limited mobility of the long polymer chains, they do not reach their equilibrium conformation within a finite time. Thus, in order to completely describe the state of a system, not only the usual variables of state but also inner ordering parameters, which reflect the thermal history of the system, are required.
KeywordsGibbs Free Energy Natural Rubber Melting Behavior Usual Variable Entropy Effect
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