Mesoscale molecular simulations, based on parameters obtained through atomistic molecular dynamics and Monte Carlo calculations, havebeen used for modeling and predicting the behavior of PET/PEN blends. Different simulations have been performed in order to study and comparepure homopolymer blends with blends characterized by the presence of PET/PEN block copolymers acting as compatibilizer. A many-scalemolecular modeling strategy was devised to evaluate PET/PEN blend characteristics, simulate phase segregation in pure PET/PEN blends, anddemonstrate the improvement of miscibility due to the presence of the transesterification reaction products. The behavior of distribution densitiesand order parameters of the compatibilized blends demonstrates that mixing properties improve significantly, in agreement with experimentalevidences. Barrier properties such as oxygen diffusivity and permeability have also been evaluated by finite element simulations. Accordingly,many-scale modeling seems to be a successful way to estimate PET/PEN blend properties and behavior upon different concentrations andprocessing conditions.
|Numero di pagine||11|
|Stato di pubblicazione||Published - 2006|
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