Thread texture (including tight and coase thread)

Schlieren texture

marble texture and so on

which were similar to those of small molecular nematic liquid crystallines

were all obtained from one aromatic copolyester B-N.Because the distribution of molecular director was not affected by lamellar decorating after quench

chemical etching and SEM technique were used to reveal disclination and director patterns. The results of electron and optical microscopy complemented each other

showing different trajectory of director between tight and coase th-read texture which were regarded as two completeoly different types of texture. The coasening process starred from the second melting peak temperature Some evidences of S= +/-- 1/2 and S= +1 disclinations and Neel domain wall were found in these nematic textures.