Polymer crystallization, nucleation temperature dependence, lamellar

The first exponential term represents the transport of molecules to the growing nucleus with U the activation energy for this process and (T - To) the temperature difference between the crystallization temperature T and the temperature at which backbone motions substantially cease. For most polymers To is about 50°C below the glass transition temperature. The second exponential term represents the work required to form a critical nucleus where TS, is the melting point of an infinitely thick lamellar crystal, AT is the supercooling and AH the heat of fusion. The term C contains various interfacial energy terms and depends upon the precise mechanism of the nucleation process. For homogeneous nucleation... 

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