Citation: HUANG Yong. BAND-LIKE TEXTURE OF ETHYLCYANOETHYL CELLULOSE MESOPHASE*[J]. Chinese Journal of Polymer Science, ;1991, 9(1): 86-93. shu

BAND-LIKE TEXTURE OF ETHYLCYANOETHYL CELLULOSE MESOPHASE*

HUANG Yong

Received Date: 1 March 1990

In the ethyl-cyanoethylcellulose ((E-CE)C)/dichloroacetic acid (DCA) cholesteric liquid crystalline solution, the hand-like texture is formed when the mesophase aggregates with the disk-like texture grow to big enough and merge with each other with increasing concentration. The band-like texture is composed of parallel equidistant bright and dark alternative strips which are about 0.2-2.0 μm in width. In the band-like texture, the layers of ordered polymer chains are perpendicular to the solution film and the axes of helicoids are parallel to it.The width of the strips is different in different in different zones.Under the effect of an external magnetic field,the strips in the band-like texture first become wider and then narrower gradually.Moreover,the axes of helicoids in the (E-CE)C/DCA mesomorphic solution change from the direction normal to the magnetic field to the agreement with the magnetic field direction.
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