Water-Soluble Top Coats for Orientation Control of Liquid Crystal-Containing Block Copolymer Films
Water-Soluble Top Coats for Orientation Control of Liquid Crystal-Containing Block Copolymer Films
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用于含液晶嵌段共聚物薄膜取向控制的水溶性面漆
DOI：
10.1002/polb.24420
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Paul F Nealey
中科院分区：
文献类型：
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作者：
He-Lou Xie;Xiao Li;Hyo Seon Suh;JiaXing Ren;LingShu Wan;Gordon S W Craig;Christopher G Arges;Paul F Nealey
聚乙烯吡咯烷酮（PVP）是一种易于去除的水溶性表面涂层，用于控制液晶嵌段共聚物（LC BCP，聚环氧乙烷-嵌段-聚（甲基丙烯酸6-（4-甲氧基-偶氮苯-4 ′-丁基）己酯））中微区的取向。还研究了相应的LC均聚物以进行比较。原子力显微镜用于确定LC BCP的圆柱形微区的取向。使用紫外-可见光谱和掠入射广角X射线散射来确定LC均聚物和在有和没有顶涂层的情况下退火的LC BCP膜中的LC介晶的取向。一旦LC BCP形态自组装，PVP顶涂层可以很容易地用水或酒精去除。表面涂层的容易去除改善了BCP在技术应用中的可加工性，并使得能够在科学研究中直接研究BCP的形态。© 2017 Wiley Periodicals，Inc. J.波利姆科学，部分B：聚合物物理2017，55，1569-1574
An easily removable, water‐soluble top coat of polyvinylpyrrolidone (PVP) is used to control the orientation of microdomains in a liquid crystalline block copolymer (LC BCP, poly(ethylene oxide)‐block‐poly(6‐(4‐methoxy‐azobenzene‐4′‐butyl) hexyl methacrylate)). The corresponding LC homopolymer is also investigated for comparison. Atomic force microscopy is used to determine the orientation of the cylindrical microdomains of the LC BCP. UV–vis spectroscopy and grazing incidence wide‐angle X‐ray scattering are used to determine the orientation of the LC mesogens in the LC homopolymer and the LC BCP films annealed both with and without a top coat. Once the LC BCP morphology is self‐assembled, the PVP top coat layer can be easily removed with water or alcohol. The facile removal of the top coat improves the processability of BCPs in technological applications, and enables direct investigation of the BCP morphology in scientific studies. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys.2017,55, 1569–1574