SHEAR-INDUCED CRYSTALLIZATION IN A LIQUID-CRYSTALLINE RANDOM COPOLYESTER

[摘要] X-ray observations have been made during high temperature shear of a liquid crystalline copolyester. Whilst being sheared above the polymer melting point, a sharp crystallite diffraction peak develops. This peak grows in intensity as the shear rate increases and disappears on cessation of shear. It is associated with the shear stabilization of crystallites, presumably of the non-periodic-layer type.

[关键词] LIQUID CRYSTAL POLYMER;SHEAR;CRYSTALLIZATION;X-RAY DIFFRACTION