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Chemical Research in Chinese Universities ›› 1997, Vol. 13 ›› Issue (2): 163-168.

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Mesomorphic Characteristics of Induced Chiral Nematic Phase of [Smectic LCP, PS(4BC/DM) /Nematic LC, E7/Chiral Dopant, CB-15]-Ternary Composite System

YANG Huai1,2, Hirotsugu Kikuchi2, CHENG Xin-Fang1, Tisato Kajiyama2   

  1. 1. Institute of Materials Science, Jilin University, Changchun 130023;
    2. Department of Chemical Science and Technology, Faculty of Engineering, Kyushu University 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812, Japan
  • Received:1997-03-26 Online:1997-04-24 Published:2011-08-17
  • Supported by:

    Supported by the National Natural Science Foundation of China.

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Abstract: The phase transition behavior and aggregating states of [smectic LCP, PS(4BC/DM)/nematic LC, E7/chiral dopant, CB-15] ternary composite system were investigated on the basis of differential scanning calorimetry (DSC) measurement, polarizing optical microscopy (POM) observation and wide angle X-ray diffraction (WAXD) patterns. It was demonstrated that if the weight ratio of the chiral dopant was fixed as 4.8wt%, an induced chiral nematic (N*) phase existed in the ternary system when PS(4BC/DM) ratio was below 47.6 wt%. Moreover, smectic like long-range ordering appeared in the induced N* phase in a certain temperature range just above the smectic A(SA) N* phase transition when PS(4BC/DM) ratio was between 19.1wt% and 47.6wt%.

Key words: Mesomorphic, Induced chiral nematic phase, Dopant