Optical Microscopic Observation of Morphology in Liquid Crystal/Polymer Composites and Their Electro-Optical Properties
Optical Microscopic Observation of Morphology in Liquid Crystal/Polymer Composites and Their Electro-Optical Properties
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DOI：
10.1080/15421406.2013.778116
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发表时间：
2013-07
影响因子：
0.7
通讯作者：
S. Niiyama;H. Kikuchi
中科院分区：
文献类型：
--
作者：
S. Niiyama;H. Kikuchi
我们已经发现，双环己基适合于从液晶/聚合物复合材料中提取液晶，所述复合材料由连续相的双相液晶和三维聚合物网络组成。在光学显微镜观察复合材料的形态时，证实了在比液晶的向列型-各向同性转变点更高的温度下，通过二环己基从复合材料中提取液晶后观察到的聚合物结构与通过非破坏性方法观察到的结构完全一致。通过非破坏性方法评价的复合材料中的聚合物结构与由光聚合引起的相分离的条件之间的关系从相图和由UV光的照射强度控制的相分离的速度的方面被密切地研究。发现液晶/聚合物复合单元的电光特性强烈地受聚合物结构的影响，特别是三维网络的孔径，其对UV光的强度特别敏感。
We have discovered that bicyclohexyl is suitable for extracting liquid crystals from liquid crystal/polymer composites consisting of a continuous phase of nematic liquid crystal and a three-dimensional polymer network. It was confirmed in optical microscopic observation for the morphology of composites that a polymer structure, observed after extraction of liquid crystals from composites by bicyclohexyl, accorded well with the structure observed by a non-destructive method at a higher temperature than the nematic–isotropic transition point of the liquid crystal. The relationship between the polymer structure in the composite which was evaluated by the non-destructive method and the condition of phase separation induced by photo-polymerization was closely investigated from an aspect of a phase diagram and the speed of phase separation controlled by the intensity of irradiation by UV light. The electro-optical characteristics of the liquid crystal/polymer composite cells were found to be strongly affected by the polymer structure, especially the pore size of the three-dimensional network, which was especially sensitive to the intensity of UV light.