Application of the Lauritzen and Hoffman Theory to PLLA

According to LH theory, the crystal growth rate (G) of linear flexible chains 

The first term represents the diffusion of chains to the growth front while the second is related to the secondary nucleation barrier. Go represents a preexponential factor, U is the activation energy for chain mobility, R is the gas constant, Tc is the isothermal crystallization temperature and Ar=T — TV is the supercooling (T is the equilibrium melting temperature). Too is the temperature where viscous flow ceases (AT —30A) and/is a temperature correction factor defined as 2TV / (T -)- TV), while Kg is the nucleation constant (which is proportional to the energy barrier for secondary nucleation) given by  

Regardless of the molecular weight, the transition temperature from Re- 

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