Kim Ju-Yong, Choi Suk-Won
Department of Advanced Materials Engineering for Information & Electronics, and Integrated Education, Institute for Frontier Science & Technology (BK21 Four), Kyung Hee University, Yongin 17104, Gyeonggi-do, Korea.
Polymers (Basel). 2021 Dec 16;13(24):4421. doi: 10.3390/polym13244421.
Micro-sized segregated liquid crystals (MSLCs) surrounded by a polymer medium can be used for haze film applications. When incident light passes through the MSLC film, the microsized particles act as light scattering centers. In this study, the results of the addition of a multi-functional acrylate to a commercial thiol-ene prepolymer system, as well as the morphology of (LC) droplets, fractal dimension (), and the optical haze performance of the micro-sized segregated LCs formed by UV-initiated photopolymerization, are reported. With increasing fraction of the multi-functional acrylate within the host polymer matrix, the small scattering centers (LC droplets) also increase, giving rise to a large optical haze in the prepared film. The optical haze can be characterized by the of the associated LC droplet morphology in the films. The optical haze and exhibit a strong correlation; thus, a qualitative prediction of the optical haze is possible via geometric fractal analysis.
被聚合物介质包围的微米级分离液晶（MSLCs）可用于制备雾度薄膜。当入射光穿过MSLC薄膜时，微米级颗粒充当光散射中心。在本研究中，报道了向商用硫醇-烯预聚物体系中添加多功能丙烯酸酯的结果，以及紫外光引发光聚合形成的微米级分离液晶（LC）液滴的形态、分形维数（）和光学雾度性能。随着主体聚合物基质中多功能丙烯酸酯含量的增加，小散射中心（LC液滴）也增加，使得制备的薄膜具有较大的光学雾度。光学雾度可以通过薄膜中相关LC液滴形态的来表征。光学雾度和呈现出很强的相关性；因此，通过几何分形分析对光学雾度进行定性预测是可能的。
