一种新型的聚合物网络胆甾液晶显示器

在胆甾液晶材料中掺入少量的聚丙烯类单体材料制作了一种新型的聚合物网络胆的液晶显示器。相对于传统的ＰＤＬＣ器件，这种新型显示器可以进行反模式显示，零电场时呈透明态，加电场呈散射态．而且还具有非常宽阔的视角特性。文中报道了器件的制作方法以及聚合物网络对器件电光特性的影响，并且对该器件的应用前景作了简要介绍。     

电场对负性介电常数各向异性的小分子胆甾相液晶的作用

介绍和总结了边界条件影响很大的受限胆甾相和聚合物分散小分子胆甾相液晶（PDCLC）两种情况下，外电场对负性介电常数各向异性的小分子胆甾相液晶的作用。前者的研究通过在不变螺距p情况下改变液晶盒鹌鹑d与外电场电压值E，发现了规律性变化的液晶相的相态结构。而对PDCLC的研究中，通过平行和垂直于电场方向的观察，得到了胆甾相变化与外加电压的具体关系，以及在彩色液晶显示上应用。     

乙基氰乙基纤维素溶致液晶的缺陷结构观察

乙基氰乙基纤维素在许多溶剂中都可以形成胆甾型液晶溶液。在液晶溶液中出现多种向错结构。本文利用偏光显微镜和电子显徽镜对液晶溶液中出现的向错结构进行了全面的观察。观察到了λ,τ和x向错线以及各种由具有相反符号的λ和τ向错线组成的向错对,其结构特征与小分子胆甾型液晶相结构特征相似。     

新型滤色器

介绍了一种新方法制造的彩色滤色器，该滤色器制造方法简单，仅含有一次涂覆和两次曝光。滤色器有好的色纯度和高的显示对比度。     

Controlling the Color of Cholesteric Liquid‐Crystalline Films by Photoirradiation of a Chiroptical Molecular Switch Used as Dopant

Using thin films of a cholesteric mixture of acrylates 2 and 3 doped with the chiroptical molecular switch (M)‐trans‐ 1 , photocontrol of the reflection color between red and green is possible. This doped liquid‐crystal (LC) film can be used for photoinduced writing, color reading, and photoinduced locking (via polymerization) of chiral, optically written information.     

The cholesteric nature of cellulose triacetate solutions

Solutions of cellulose triacetate (CTA) in trifluoroacetic acid (TFA) become liquid crystalline above a certain critical concentration. Using the techniques of spectrophotometry, wide-angle light scattering and circular dichroism we have shown that the mesophase formed is cholesteric. We have measured its pitch, which depends on polymer concentration, and shown that the cholesteric structure is right-handed. Measurements of optical activity and the optical effects of shear and magnetic fields are also described and discussed.     

胆甾液晶高分子的研究及信息领域的潜在应用

胆甾液晶高分子兼具胆甾相液晶的独特光学性质及高分子的特点从而具有广泛的应用前景。本文在介绍胆甾相液晶独特的螺旋状分子结构和光学性能的基础上,概括了热致侧链胆甾高分子(ChSLCP)的结构及其对性能的影响,并介绍其在光信息记录方面的研究进展。     

Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals

We have studied the lasing characteristics of a dye-doped nematic layer sandwiched by two polymeric cholesteric liquid crystal (CLC) films as photonic band gap (PBG) materials. The nematic layer acts as a defect layer, the anisotropy of which brings about the following remarkable optical characteristics: (1) reflectance in the PBG region exceeds 50% due to the retardation effect, being unpredictable from a single CLC film; (2) efficient lasing occurs either at the defect mode wavelength or at the photonic band edge; and (3) the lasing emission due to both the defect mode and the photonic band edge mode contains both right- and left-circular polarizations, while the lasing emission from a dye-doped single CLC layer with a left-handed helix is left-circularly polarized.     

用原子转移自由基聚合方法合成胆甾侧链液晶聚合物

以胆固醇氯甲酸酯和丙烯酸羟乙酯为原料。合成了丙烯酸羟乙酯基胆甾醇碳酸酯(简称GMCC),作为一种含液晶基元的单体,使之在苯甲醚溶液中在Ebib／CuBr／MA3-DETA催化系统下进行原子转移自由基聚合(ATRP)．动力学分析表明。转化率随着反应时间呈线性增加,Ln[M]0／[M]与反应时间呈良好线性关系。反应产物的分子量分布较窄(1．3左右)．所得产物可作为大引发剂引发丙烯酸甲(丁)酯通过同样的催化体系．进一步聚合成嵌段共聚物．胆甾侧链液晶聚合物的相转变温度和织构偏光显微镜观察表明,这种聚合物具有良好的液晶性能．