CJCU

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (2): 299.

• Articles • Previous Articles     Next Articles

Synthesis and Liquid Crystalline Behavior of Polyazomethineethers Containing Pendant Groups of Methoxy

ZHANG Qi-Zhenl1, LI Xiao-Fang1, YANG Zhao-He2   

  1. 1. Department of Chemistry, Shandong University, Jinan, 250100;
    2. Institute of Crystal Materials, Shandong University
  • Received:1993-03-21 Revised:1993-09-07 Online:1994-02-24 Published:1994-02-24

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Abstract: In this paper,seven main chain thermotropic polyazomethineethers (SAn, n=3～8 are 10synthesized from bis-(3-methoxy-4-hydroxybenzylidene)-4,4'-diimdophenyl.(BISPHENOL)and α,ω-dibromoalkane by phase-transfer-catalysis polyetherification reaction.Their structures and liquid crystalline properties have been characterized by 1H NMR, IR, UV,elementary analysis, polarized microscopy with a hot stage, DSC and X-ray diffractions.Their melting temperature and clearing temperature are affected by the number of methylene groups in the flexible spacer and the usual odd-even effect is observed.

Key words: Phase-transfer-catalysis, Liquid crystalline polymers, Polyazomethineethers, Bis-(3-methoxy-4-hydroxybenzylidene)-4,4'-diimidobenzene

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