当前位置: X-MOL 学术Fluid Phase Equilibr. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fast-response halogenated 4-alkyl-4′′-cyano-p-terphenyls as dual frequency addressing nematics
Fluid Phase Equilibria ( IF 2.6 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.fluid.2020.112770
Dorota Węgłowska , Michał Czerwiński , Przemysław Kula , Mateusz Mrukiewicz , Rafał Mazur , Jakub Herman

Abstract Twenty-two compounds belonging to halogenated 4-alkyl-4′′-cyano-p-terphenyls have been synthesized and mesomorphic properties using polarizing optical microscope and differential scanning calorimetry have been determined. The birefringence of the compounds using prism coupling technique was determinated. The multicomponent eutectic mixture consisted of synthesised compounds was prepared and investigated. The prepared mixture exhibits very broad nematic phase range, over 140 °C, with the melting point below 0 °C. Dielectric studies revealed that prepared mixture is very useful for dual frequency adressing system, because it posses large positive dielectric anisotropy (above 22) and becomes negative above the relatively low cross-over frequency (14 kHz). The total response time of the prepared mixture measured at room temperature at low operating voltage (24 V) is short (6.5 ms) which is suitable for fast switching optical applications.

中文翻译:

快速响应卤化 4-烷基-4''-氰基-对三联苯作为双频寻址向列剂

摘要 合成了22种属于卤代4-烷基-4''-氰基-对三联苯的化合物,并利用偏光显微镜和差示扫描量热法测定了介晶性质。使用棱镜耦合技术测定化合物的双折射。制备并研究了由合成化合物组成的多组分共晶混合物。制备的混合物表现出非常广泛的向列相范围,超过 140 °C,熔点低于 0 °C。介电研究表明,制备的混合物对于双频修整系统非常有用,因为它具有较大的正介电各向异性(大于 22),并且在相对较低的交叉频率(14 kHz)以上变为负值。
更新日期:2020-11-01
down
wechat
bug