Thermo-conductive and morphological considerations have led to the conclusion that ribbon-like crystals developed in the presence of thermal gradients behave in the same manner of macroscopic cantilevers, whose deformation in a non uniform temperature field is a deeply examined issue in the continuum mechanics. Therefore, the well known concepts and principles of this science have been applied to a lower scale to explain the origin of lamellar twisting during the growth of optically banded spherulites in polymer samples squashed between glass surfaces.The developed model considers that the torsional motion of the lamellae is caused by the presence of thermal gradients across the thickness of the samples and accounts for both morphological and optical characteristics of polymer spherulites.
A thermo-conductive approach to explain the origin of lamellar twisting in banded spherulites
M Raimo
2007
Abstract
Thermo-conductive and morphological considerations have led to the conclusion that ribbon-like crystals developed in the presence of thermal gradients behave in the same manner of macroscopic cantilevers, whose deformation in a non uniform temperature field is a deeply examined issue in the continuum mechanics. Therefore, the well known concepts and principles of this science have been applied to a lower scale to explain the origin of lamellar twisting during the growth of optically banded spherulites in polymer samples squashed between glass surfaces.The developed model considers that the torsional motion of the lamellae is caused by the presence of thermal gradients across the thickness of the samples and accounts for both morphological and optical characteristics of polymer spherulites.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
