Optical properties and optimized conditions for polymer dispersed liquid crystal containing UV curable polymer and nematic liquid crystal
Optical properties and optimized conditions for polymer dispersed liquid crystal containing UV curable polymer and nematic liquid crystal
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DOI：
10.1016/j.cap.2014.12.027
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发表时间：
2015-03-01
影响因子：
2.4
通讯作者：
Seo, Yongho
中科院分区：
文献类型：
--
作者：
Kim, Yura;Jung, Dayeon;Seo, Yongho
通过将紫外光固化聚合物与液晶相结合，合成了聚合物分散液晶。当液晶与聚合物的浓度比为7：3，紫外光固化时间为18 min，膜厚小于25 mm时，聚合物的光学性能最佳。在高浓度（>= 70%）的样品中，液晶在聚合过程中的偏析量足以形成球形液滴，阈值驱动电压降低。开启过程的响应时间几乎与浓度无关，而关闭过程几乎与浓度成正比。从微观图像和紫外-可见光谱分析，解释了液晶液滴形态与光学性能的关系。(C)2014爱思唯尔有限公司版权所有。
Polymer dispersed liquid crystal was synthesized by combining a UV curable polymer and a nematic liquid crystal. Optimized conditions for the optical properties of the PDLC were found to be the concentration ratio of LC and polymer at 7:3, UV curing time of 18 min, and the thickness less than 25 mm. In the case of the high LC concentration (>= 70%) sample, the amount of liquid crystal segregated in the polymerization process was enough to form a spherical shape of droplet, and the threshold driving voltage was reduced. The response time for the turn-on process was nearly independent of the concentration, while the turn-off process was almost proportional to the concentration. From microscopic image and UV-visible spectrum analysis, the relation between LC droplet morphology and optical properties were explained. (C) 2014 Elsevier B.V. All rights reserved.