Development of the Rigid Amorphous Phase RAP as Revealed by SWD

1 Aromatic Polyesters Poly(ethylene terephthalate), Poly(butylene isophtheilate) 

SWD for other polymer, namely poly (butylene isophthalate)(PBI) [49], and the corresponding (Z e) orm data are also included in Fig. 21.13 for comparison. One may propose the idea that in the second regime, which we can associate with the secondary crystallization, crystalUzation takes place essentially in the inter lamellar stacks amorphous phase. These secondary crystals should be arranged either as independent lamellae or as very defective stacks. This mechanism should not produce significant amounts of RAP because, as previously discussed, the RAP can be assigned to an intra lamellar stacks amorphous phase. Additional support for this model on the basis of structural experiments has been discussed extensively for PBI [49]. A similar view has been recently proposed to explain secondary crystalUzation in poly(ethylene isophthalate-co-terephtalate) copolymers crystallized from the melt [50]. 

We would like to express our gratitude to our colleagues C. Alvarez, Z. Denchev, D.R. Rueda, S.S. Funari, M. Jimenez-Ruiz and F.J. Balta-Calleja 

Atomistic Simulation of Polymer Melt Crystallization by Molecular Dynamics 

The kinetics of polymer crystallization and the structure of a forming crystal are very sensitive to molecular level details. For this reason, different 

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