The phase behaviour and optical properties of a nematic/chiral dopant liquid crystalline mixture system
The phase behaviour and optical properties of a nematic/chiral dopant liquid crystalline mixture system
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DOI：
10.1080/02678290412331304113
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发表时间：
2004-11-01
期刊：
影响因子：
2.2
通讯作者：
Hwang, JC
中科院分区：
文献类型：
--
作者：
Chen, WR;Hwang, JC
研究了向列液晶和手性掺杂二元混合物的相行为和聚集态。向列相液晶E7与手性掺杂剂S811在整个浓度范围内均可混相。当S811含量在20%以下时，E7/S811二元混合物形成N*相；当S811含量在40% ~ 90%时，形成SmA*相。在冷却过程中发现BP和TGBA*受挫相，S811含量在25% ~ 35%之间。随着手性掺杂剂含量的增加，二元混合物的螺旋节距减小。XRD分析表明，随着手性掺杂物含量的增加，二元复合材料的取向有序度提高。
The phase behaviour and aggregation states of a binary mixture of a nematic liquid crystal and a chiral dopant have been investigated. The nematic liquid crystal E7 was miscible with the chiral dopant S811 over their entire concentration range. Binary E7/S811 mixtures formed the N* phase for S811 contents under 20%, and the SmA* phase for S811 contents between 40% and 90%. BP and TGBA* frustrated phases were found during cooling, for S811 contents between 25% and 35%. The helical pitches of the binary mixtures decreased with increasing chiral dopant content. From XRD profiles, the orientational ordering of the binary composites was found to increase with increasing chiral dopant content.