Crystal crystallite competition

Glass formation or the absence of crystallite nucleation and growth is also dependent on the confusion principle . This is an empirical observation which suggests that, in a multicomponent melt, several crystalline forms are in competition in the crystallization process the confused situation that results acts as a barrier to microcrystal growth and enhances the formation of the vitreous state. 

Crystallization is the competition between two processes nucleation and crystal growth. Nucleation is the formation of small sites (nuclei) from which crystallites can grow. Primary nucleation creates the initial nuclei. Crystallites develop aroimd these nuclei. Then in secondary nucleation, the surfaces of the crystallites are nucleated. More polymer chains diffuse to the crystallite surfaces and growth continues. 

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