EFFECTS OF AZO POLYMER STRUCTURES AND SURFACE-RELIEF GRATING PARAMETERS ON LIQUID CRYSTAL ALIGNMENT BEHAVIOR

Miao-cai Guo; Ya-ning He; Xiao-gong Wang

doi:10.3724/SP.J.1105.2013.13115

您当前的位置：

首页 >

文章列表页 >

EFFECTS OF AZO POLYMER STRUCTURES AND SURFACE-RELIEF GRATING PARAMETERS ON LIQUID CRYSTAL ALIGNMENT BEHAVIOR

Research Article | 更新时间：2021-03-19

- EFFECTS OF AZO POLYMER STRUCTURES AND SURFACE-RELIEF GRATING PARAMETERS ON LIQUID CRYSTAL ALIGNMENT BEHAVIOR
- Acta Polymerica Sinica Issue 12, Pages: 1501-1507(2013)
- 作者机构：
  
  1. 清华大学教育部先进材料重点实验室化工系高分子研究所,北京,100084
  2. 中航复合材料有限责任公司中航复合材料技术中心北京航空材料研究院先进复合材料重点实验室,北京,100095
- 作者简介：
- 基金信息：
- DOI：10.3724/SP.J.1105.2013.13115
  CLC：
- Published：20 December 2013，
扫描看全文
Miao-cai Guo, Ya-ning He, Xiao-gong Wang. EFFECTS OF AZO POLYMER STRUCTURES AND SURFACE-RELIEF GRATING PARAMETERS ON LIQUID CRYSTAL ALIGNMENT BEHAVIOR. [J]. Acta Polymerica Sinica (12):1501-1507(2013)
DOI：

Miao-cai Guo, Ya-ning He, Xiao-gong Wang. EFFECTS OF AZO POLYMER STRUCTURES AND SURFACE-RELIEF GRATING PARAMETERS ON LIQUID CRYSTAL ALIGNMENT BEHAVIOR. [J]. Acta Polymerica Sinica (12):1501-1507(2013) DOI： 10.3724/SP.J.1105.2013.13115.

摘要

利用几种含不同生色团和具有不同生色团密度的偶氮聚合物刻写了表面起伏光栅（SRGs），研究了偶氮聚合物结构、不同起伏深度、周期和写入偏振态的表面起伏光栅对液晶取向性能的影响.对线偏振p+p干涉激光在BP-AZ-CN膜上刻写的表面起伏光栅，随着表面起伏深度增加，对5CB液晶的取向能力逐渐增强.在BP-AZ-CA和PA-AZ-CA薄膜上刻写的周期为800 和1200 nm的光栅，在光栅深度从16~100 nm都能诱导液晶均一取向排列.对起伏深度接近的BP-AZ-CA膜SRGs，周期为800 nm的SRGs诱导液晶的取向的能力明显优于周期1200 nm的SRGs.对周期同样为1200 nm，PA-AZ-CA表面光栅比BP-AZ-CA光栅具有更好的液晶取向能力.对于用圆偏振RCP+LCP干涉激光在PA-AZ-CA膜上刻录的SRGs，则观察不到液晶在SRGs表面的单轴取向.基于上述结果，对不同偶氮聚合物的分子结构及其SRGs的表面沟槽和膜内分子取向等因素对液晶取向的影响进行了讨论.

Abstract

The liquid-crystal (LC) alignment properties of surface relief gratings (SRGs) of different azo polymers and their correlations with grating parameters and polarizations of writing beams were studied.Three azo polymers with different kinds of azo chromophores and different chromophore densities were used in this study.The contrasts (Tmax/Tmin) and optical photographs of different liquid crystal cells were compared to determine the alignment properties.For the gratings with a period of 800 nm recorded by p+p interfering Ar+ laser beams on the epoxy based azo polymer containing 4-cyanoazobenzene chromophores (BP-AZ-CN) films

the ability for aligning liquid crystal increased with the increase of grating depths.For gratings of the epoxy based azo polymer containing 4-carboxylazobenzene chromophores (BP-AZ-CA) with a period of 800 nm and the gratings of the polyacrylate based azo polymer containing 4-carboxylazobenzene chromophores (PA-AZ-CA) with a period of 1200 nm

the liquid crystal showed uniform alignment when the grating depth was in a range from 16 to 100 nm.For the BP-AZ-CA gratings with a similar depth

the liquid crystal showed better alignment on the gratings with a period of 800 nm than gratings with a period of 1200 nm.Compared with BP-AZ-CA and PA-AZ-CA gratings with a period of 1200 nm

liquid crystal shows a better alignment on the PA-AZ-CA gratings.For the PA-AZ-CA gratings inscribed by RCP+LCP interfering Ar+ laser beams

no unidirectional alignment was observed even for the gratings depths over 100 nm.Above results can offer a better understanding of the effect of polymer structures and grating parameters on the liquid crystal alignment performance.

关键词

偶氮聚合物液晶取向表面起伏光栅结构

Keywords

Azo polymerLiquid crystalAlignmentSurface relief gratingsStructures

references

更多指标>

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

RECENT DEVELOPMENTS IN LIQUID CRYSTALLINE AZO BLOCK COPOLYMERS:SELF-ASSEMBLY AND PHOTORESPONSIVE PROPERTIES

Ionic Conductive Elastomers Based on Soft and Hard Segment Crosslinked Copolymers

Self-assembly Behavior of Amino Modified Cellulose Nanocrystals

Hierarchical Structures of Self-assembled Liquid Crystals and Their Applications

Synthesis of Main-chain Azobenzene Liquid Crystalline Copolyester with Side Hydroxyl Group and Its Photoresponsive Behavior

Related Author

No data

Related Institution

Department of Chemical Engineering, Laboratory of Advanced Materials, Tsinghua University

Institute of Advanced Materials/College of Chemistry and Chemical Engineering, Southeast University

Department of Chemistry, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University

Institute of Advanced Materials, Key Laboratory for Organic Electronics and Information Displays, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications

College of Engineering and Applied Sciences, Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University

Postal code：100190
Tel：010-62588927 Email：gfzxb@iccas.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备05002797号-8 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰