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Liquid-Crystalline copolymers and polymer blends containing electron donor and acceptor groups: Effects of mesogenic structures on the smectic phase and the miscibility by Yozo Kosaka; Toshiyuki Uryu is a Materials Science article available to read on EtoBox.

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## Abstract Side‐chain liquid‐crystalline copolymers and polymer blends containing an electron‐donating (carbazolylmethylene)aniline group and electron‐accepting nitrophenyl groups with various central linking groups between aromatic groups in the mesogenic units, i.e., NCH, CHCH, NN, and COO, were prepared to examine effects of the mesogenic structure on thermal behaviours. The most remarkable effects of the central linking group on the thermal properties and the miscibility were observed for the polymer blends. The 1:1 miscible polymer blends were prepared from the electron‐donating polymer containing (carbazolylmethylene)aniline group (PM6C~z~) and the electron‐accepting polymers with similar central linking groups, i.e., NCH, CHCH, and NN. For example, the 1: 1 polymer blend of PM6C~z~ and the electron‐accepting polymer containing the nitrostilbene group induced a smectic phase from 73 to 207°C. This isotropic temperature was 46°C higher than the calculated value (161°C) based on the composition without the electron donor‐acceptor interaction. On the other hand, the 1: 1 polymer blend of PM6C~z~ and the electron‐accepting polymer containing the nitrophenylbenzoate group s

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Author

Yozo Kosaka; Toshiyuki Uryu

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

1995

Language

EN

Field

Materials Science (Physical Sciences)