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Liquid Crystalline Aromatic Heterocyclic Polymers

Since Robinson [1] discovered cholesteric liquid-crystal phases in concentrated a-helical polypeptide solutions, lyotropic liquid crystallinity has been reported for such polymers as aromatic polyamides, heterocyclic polymers, DNA, cellulose and its derivatives, and some helical polysaccharides. These polymers have a structural feature in common, which is elongated (or asymmetric) shape or chain stiffness characterized by a relatively large persistence length. The minimum persistence length required for lyotropic liquid crystallinity is several nanometers1. [Pg.90]

See other pages where Liquid Crystalline Aromatic Heterocyclic Polymers is mentioned: [Pg.254]    [Pg.254]    [Pg.298]    [Pg.345]    [Pg.255]    [Pg.415]    [Pg.415]    [Pg.416]    [Pg.56]    [Pg.773]    [Pg.263]    [Pg.273]    [Pg.355]    [Pg.186]    [Pg.287]    [Pg.3]    [Pg.9]    [Pg.773]    [Pg.355]    [Pg.7172]    [Pg.2065]    [Pg.273]    [Pg.24]   


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Aromatic liquids

Aromatic-heterocyclic polymers

Aromaticity aromatic heterocycles

Aromaticity heterocyclics

Heterocycles aromatic

Heterocycles aromatization

Heterocyclic aromatics

Liquid crystalline polymers

Polymer heterocyclic

Polymers liquid crystallinity

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