The results showed that M1 and M2 present the enantiotropic nematic phase,M3 presents the nematic phase with SA,SC and SB smectic phases and M4 presents the nematic phase with SA,SC and SB monotropic phases.
研究表明,单体M1和M2呈现互变向列相,M3呈现向列相和近晶A(SA)相、近晶C(SC)相和近晶B(SB)相,M4呈现向列相和单变SA相、SC相和SB相;聚合物P1和P2呈现向列相,P3和P4呈现SA相和向列相。
In this paper, the advantages of these compounds are summarized, showing that naphthalene derivative is useful for preparing a liquid crystal composition with a wide temperature range of nematic phase, very large dielectric anisotropy and a small birefringence, thereby being driven at a low voltage, and suitable for high performance STN.
大量文献数据表明其可加宽混合液晶的向列相温度范围;增大介电各向异性;降低阈值电压以及调节适宜的双折射率,适用于超扭曲向列型(STN型),薄膜晶体管型(TFT型)等高性能液晶材料。
Typical textures of S_C, S_B, S_A and nematic phase were observed.
在液晶态可观察到部分单体的近晶C相(SC)、近晶B相(SB)、近晶A相(SA)和所有单体向列相的典型织构。
The chemical structure,thermal properties and liquid crystalline character of liquid crystalline ionomers were analyzed with FT-IR,POM,DSC and WAXD,the result shows the ionomers have the same structures——nematic texture——with the previous polymers before ion monomer was added.
结果表明:各离聚物与原没有加入离子单体的聚合物具有相同的织构,均为向列型液晶。
The thermotropic liquid crystals were determined to be nematic using a polarizing.
所得聚合物用偏光显微镜 ,示差扫描量热分析 ,广角、小角 X射线衍射等方法进行表征 ,确定了其液晶织构属于向列
The results show that they are crystalline polymers and form nematic mesophase.
结果表明这种结构的聚酯酰胺为结晶性聚合物，熔体呈向列型液晶态；聚合物的熔点主要取决于聚合物的结构，即酯、酰肢健的位置、芳环取代方式和脂肪链的长短。
The nematic liquid crystal 5CB doped with 1 % (mass fraction) methyl-red was employed and the two-wave coupling method was used to measure the first order diffraction efficiency.
制备了掺杂甲基红(质量分数1%)向列液晶薄膜样品,测量了Ar+激光的透过率与样品厚度之间的关系,发现激光的偏振方向与液晶指向矢方向垂直时,透射率最大。
According to electrooptical properties of nematic liquid crystal, two types of liquid crystal are used as scattering materials to carry out the experimental study of the partial coherence light source designed for EFISI.
利用向列液晶的电光特性 ,选用两种液晶盒作为散射体 ,完成了液晶散射法产生部分相干源的原理性实验 ,得出液晶散射光能量透过率、均匀性及相干性与外加电场的关系。
A scattering polarizer is prepared by using polymer networks formed from an amorphous monomer, nematic liquid crystals and polyimide coated ITO glass substrates.
它是由非晶态单体形成的聚合物网络、向列液晶和涂有聚酰亚胺的 ITO玻璃基板组成。
The Technology and Progress of Super Twisted Nematic Liquid Crystal Display;
超扭曲向列相液晶显示技术及其进展
Experimental study of electric-termo-optic effect of nematic liquid crystal;
向列相液晶电热光效应的实验研究
The result shows that molecules with non-alkyloxy substituent are nematogenic and short alkyloxy chains (n= 1～3 ) in the homologue lead to nematic phase with odd-even effect, the molecules with longer alkyloxy chains (n=4～1.
当Y为非烷氧基时,呈向列相液晶;当Y为较短的烷氧基时(n=1～3),液晶化合物具有向列相(N);Y为较长烷氧基时(n=4～16),液晶化合物只有近晶B相(SB)和近晶A相(SA);SA-I相变的熵变随烷氧链原子数而奇-偶变化,但与N-I相变的“奇-偶效应”相反。