Size control of phase-separated liquid crystal droplets in a polymer matrix based on the phase diagram
Size control of phase-separated liquid crystal droplets in a polymer matrix based on the phase diagram
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DOI：
10.1002/polb.23071
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
S. Ohta;S. Inasawa;Y. Yamaguchi
中科院分区：
文献类型：
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作者：
S. Ohta;S. Inasawa;Y. Yamaguchi
当液晶（LC）和光反应性单体的混合物被UV光照射时，发生聚合并且LC液滴通过相分离形成，产生聚合物分散的LC（PDLC）。虽然LC液滴的尺寸控制和PDLC膜中LC的减少量在应用中是重要的，但在低LC分数下LC液滴的精确尺寸控制尚未实现。在本研究中，使用聚合过程中LC/初始单体和LC/聚合物的相图来控制不同LC分数下的LC液滴尺寸。无论是在初始相图中的样品的相对位置和在聚合过程中的相分离线的移位被证明是重要的，在确定的LC液滴的大小。我们的研究结果有望提供一种新的策略，特别是在低LC分数范围内精确控制LC液滴的尺寸，这将是一个很大的帮助PDLC应用。© 2012 Wiley Periodicals，Inc.聚合物科学杂志B部分：聚合物物理学，2012年
When a mixture of liquid crystal (LC) and photo reactive monomer is irradiated by UV light, polymerization occurs and LC droplets form through phase separation, producing polymer dispersed LCs (PDLCs). Although size control of LC droplets and reduced amounts of LC in PDLC films are important in applications, precise size control of LC droplets at a low LC fraction has not yet been accomplished. In this study, the phase diagrams of the LC/initial monomer and the LC/polymer during polymerization were used to control LC droplet size at various LC fractions. Both the relative position of the sample in the initial phase diagram and the shift of the phase separation line during polymerization were shown to be important in determining the size of LC droplets. Our results are expected to provide a new strategy for precise size control of LC droplets especially at a low LC fraction range, which would be a great help for PDLC applications. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012