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Synthesis and characterization of liquid crystalline polyesters containing crown ether units in the mesogens

✍ Scribed by H. Fischer; F. E. Karasz

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
378 KB
Volume
45
Category
Article
ISSN
0323-7648

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✦ Synopsis

Liquid crystalline polyetheresters with crown ethers in the mesogenic unit have been synthesized using the DB-[ 181-C-6 crown. This compound was then transferred to the diacetyl-, dicarboxy-and dicarboxydichloride derivatives. After incorporation of the crown ether moiety into the mesogens of main chain polymers, the liquid crystalline phase ofthe polymers obtained was observed.The appearance ofan unordered smectic phase (smectic A or smectic C) was proved by combining optical investigations, X-ray diffraction and DSC measurements.

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