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Proceedings Paper

Series of binary mixtures
Author(s): YanQing Tian; Yingying Zhao; Xinyi Tang; Xinmin Huang
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Paper Abstract

A series of liquid crystalline binary polymer blends consisting of P1 with a dimethylamino group as an electron donor and P2 with a nitro group as an electron acceptor was prepared and investigated by using DSC, optical polarized microscopy and x-ray diffraction. The binary mixtures of their model compounds 4-hexyloxy-4'-nitro-azobenzene (MA) and 4-hexyloxybenzylidene-4'-(N,N-dimethylamino)-aniline (MD) were also prepared and investigated. The results show that these binary mixtures have good miscibility and exhibit broader mesophase ranges than that of the individual acceptor and donor, which are considered to be caused by the interactions between the electron donor and acceptor groups. For example, the isotropic temperature of the 1:1 polymer blends is 441.5K, which is 48K higher than the calculated value based on the composition without any interaction, while its melting point is 28K lower than the calculated value. And for the 1:1 mixture of MA and MD, the isotropic temperature was 20 degrees C higher than the calculated value and the melting point was 19 degrees C lower than the calculated value.

Paper Details

Date Published: 1 January 1998
PDF: 4 pages
Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); doi: 10.1117/12.301298
Show Author Affiliations
YanQing Tian, Jilin Univ. (China) and Changchun Institute of Physics (China)
Yingying Zhao, Jilin Univ. (China)
Xinyi Tang, Jilin Univ. (China)
Xinmin Huang, Changchun Institute of Physics (China)

Published in SPIE Proceedings Vol. 3319:
Liquid Crystals: Chemistry and Structure
Marzena Tykarska; Roman S. Dabrowski; Jerzy Zielinski, Editor(s)

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