The existence of stable fl form crystallites in poly(butylene terephthalate) has been investigated. Wide angle X-ray measurements suggest that such crystallites are only stable provided that they are of comparatively small dimensions and that they are then poorly connected to the bulk polymer. A simple theoretical model is presented to explain the stability of the crystals in terms of the contributions to the free energy from both the crystallites and the surrounding amorphous material.
Посилання на статтю:
The existence of a stable # form in oriented poly ( butylene terephthalate) / J. Roebuck*, R. Jakeways and I. M. Wardt // Polymer. – 1992. – Vol 33. – P. 227-232.