Negative dielectric anisotropy liquid crystal medium containing cyclopropyl and application of liquid crystal medium
A dielectric anisotropy and liquid crystal medium technology, applied in liquid crystal materials, nonlinear optics, optics, etc., can solve the problems of poor mutual solubility of negative liquid crystal compounds, and achieve increased mutual solubility, large dielectric anisotropy, Improve the effect of black state
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[0058] Below in conjunction with embodiment the present invention is described in further detail:
[0059] The parts involved in the following examples are all percentages by weight, and the unit of temperature is ° C. The specific meanings and test conditions of other symbols are as follows:
[0060] S-N represents the melting point (°C) from the crystalline state of the liquid crystal to the nematic phase;
[0061] c.p. indicates the clearing point of the liquid crystal (°C), the test instrument: Mettler-Toledo-FP System Microthermal Analyzer;
[0062] γ1 is the rotational viscosity (mPa·s), and the test conditions are: 25°C, INSTEC: ALCT-IR1, 18 micron vertical box;
[0063] K 11 is the torsional elastic constant, K 33 is the stretch elastic constant, and the test conditions are: 25°C, INSTEC: ALCT-IR1, 18 micron vertical box;
[0064] △ε means dielectric anisotropy, △ε=ε ∥ -ε ⊥ , where ε ∥ is the dielectric constant parallel to the molecular axis, ε ⊥ is the dielec...
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