Liquid crystal composition and display unit containing the same
A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of low birefringence and viscosity, and achieve good refractive anisotropy, high clearing point temperature, and good dielectric properties anisotropic effect
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Embodiment 1
[0071] The liquid crystal compositions of Example 1, Example 2 and Comparative Example 1 were mixed at 25° C. according to the compound composition and content shown in Table 2 below to obtain liquid crystal compositions. The liquid crystal compositions of Example 1, Example 2 and Comparative Example 1 were tested according to the following test methods, and the results obtained are summarized in Table 2 below.
[0072] [testing method]
[0073] 1. Clarification point temperature (T ni , °C): Using a differential scanning calorimeter (DSC) system, the liquid crystal composition is placed on an aluminum plate and weighed precisely 0.5 to 10 mg. The endothermic and exothermic peaks of the liquid crystal composition due to the phase change The starting point is used to determine the phase change temperature. The expression of the phase change is: the crystalline phase is labeled C, the smectic phase is labeled S, the nematic phase is labeled N, and the liquid is labeled I. Among th...
Embodiment 3
[0083] The liquid crystal compositions of Example 3 and Comparative Example 2 were mixed at 25° C. according to the compound composition and content of Table 3 below to obtain liquid crystal compositions. The liquid crystal compositions of Example 3 and Comparative Example 2 were tested according to the aforementioned test methods, and the results obtained are summarized in Table 3 below.
[0084] table 3
[0085]
[0086] From the results in Table 3, it can be seen that the liquid crystal composition of Example 3 can have a higher T because it contains the compound shown in Chemical Formula 2. ni , Better Δε, Δn and K 11 , And good low-temperature storage.
Embodiment 4、5
[0087] [Examples 4 and 5 and Comparative Examples 3 and 4]
[0088] The liquid crystal compositions of Examples 4 and 5 and Comparative Examples 3 and 4 were mixed at 25° C. to obtain liquid crystal compositions according to the compound composition and content of Table 4 below. The liquid crystal compositions of Examples 4 and 5 and Comparative Examples 3 and 4 were tested according to the aforementioned test methods, and the obtained results are summarized in Table 4 below.
[0089] Table 4
[0090]
[0091] Comparing the results of Example 4, Example 5 and Comparative Example 3, it can be found that the liquid crystal composition of Comparative Example 3 has lower Δn and does not have low-temperature storage properties, which proves that when the liquid crystal composition is not added to the chemical formula 2 When it is a compound, it will not have low temperature storage.
[0092] Comparing the results of Example 4, Example 5 and Comparative Example 4, it can be found that the ...
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