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Solvent composition dependence of band morphology in sheared lyotropic ethylcellulose liquid crystals
Author(s) -
Zhao Chuntian,
Zhang Guangli,
Cai Baolian,
Xu Mao
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19980801)199:8<1485::aid-macp1485>3.0.co;2-o
Subject(s) - lyotropic , dichloroacetic acid , solvent , lyotropic liquid crystal , chemistry , morphology (biology) , acetic acid , polymer chemistry , crystallography , chemical engineering , liquid crystalline , organic chemistry , polymer , geology , paleontology , engineering , phase (matter)
The width, regularity, and relaxation behaviour of the banded texture varies with the solvent of lyotropic ethylcellulose liquid crystals. The bands in dichloroacetic acid are wider, more stable and more regular than those in glacial acetic acid or acrylic acid. The band width decreases with increasing concentration of the liquid crystalline solutions. The phenomena are tentatively explained with a contraction mechanism. The extended chain conformation favours relatively wide, regular, and stable bands.