NEW THEORETICAL APPROACH OF THE SECONDARY NUCLEATION AT HIGH SUPERCOOLING

A new model for lamellar crystallization is presented. It ensures a finite crystal thickness at every supercooling. The result comes from a detailed description of the buildup of a secondary nucleus in which the segmental nature of the linear macromolecules is explicitly considered. The potentialities of the new model are illustrated by detailed calculations of the dependence of the lamellar thickness on the crystallization temperature and by considering the dependence of the crystal thickness of polyamides on the length of their repeating unit. © 1979, American Chemical Society. All rights reserved.