Method of Measuring Nematic LC Rotational Viscosity

GUI Li-hong; FENG Jing-yi; SHI Zi-qian; LIU Hong-gai; QIAO Yun-xia

doi:10.3788/YJYXS20132804.0527

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Method of Measuring Nematic LC Rotational Viscosity

Material Physics & Chemistry | 更新时间：2020-08-12

- Method of Measuring Nematic LC Rotational Viscosity
- Chinese Journal of Liquid Crystals and Displays Vol. 28, Issue 4, Pages: 527-533(2013)
- 作者机构：
  
  1. 石家庄诚志永华显示材料有限公司,河北石家庄,050091
  2. 河北省平板显示材料工程技术研究中心,河北石家庄,050091
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20132804.0527
  CLC： TH836
- Received：13 December 2012，
  
  Revised：07 February 2013，
  
  Published：15 August 2013
- 稿件说明：
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贵丽红, 丰景义, 史子谦, 刘宏改, 乔云霞. 向列相液晶旋转黏度测试方法的研究[J]. 液晶与显示, 2013,28(4): 527-533

GUI Li-hong, FENG Jing-yi, SHI Zi-qian, LIU Hong-gai, QIAO Yun-xia. Method of Measuring Nematic LC Rotational Viscosity[J]. , 2013,28(4): 527-533
贵丽红, 丰景义, 史子谦, 刘宏改, 乔云霞. 向列相液晶旋转黏度测试方法的研究[J]. 液晶与显示, 2013,28(4): 527-533 DOI： 10.3788/YJYXS20132804.0527.

GUI Li-hong, FENG Jing-yi, SHI Zi-qian, LIU Hong-gai, QIAO Yun-xia. Method of Measuring Nematic LC Rotational Viscosity[J]. , 2013,28(4): 527-533 DOI： 10.3788/YJYXS20132804.0527.

摘要

文章总结了液晶旋转黏度的几种测试方法

分析了其各自的优缺点。根据瞬态电流法得到了混合液晶的旋转黏度值

通过对目前正性液晶材料的

测试方法进行改良和优化得到了准确的混合液晶旋转黏度值。提出了单体液晶分子旋转黏度的拟合方法。测试了液晶的旋转黏度和介电常数随温度变化的趋势。总结了不同结构单体液晶旋转黏度和介电常数的关系。

Abstract

This paper introduced several methods of measuring rotational viscosity of nematic liquid crystal

and analyzed the characteristic of each. According to the method of transient current

the rotational viscosity of nematic LC mixture has been gotten. Through improving the method of measuring dielectric constant

of liquid crystal

rotational viscosity of LC mixture can be measured exactly.The changing line between

and rotational viscosity have been measured. A method for calculating the rotational viscosity of LC monomer was supplied.The relations of rotational viscosity and dielectric constant of liquid crystal monomer with different structures were summarized.

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references

芦水军,曹召良,曲艳玲,等.液晶波前校正器动态位相应特性研究 [J]. 液晶与显示, 2012,27(6):730-735.[2] Demus D,Goodbye J W, Gray G W,et al.Handbook of Liquid Crystals [M].Germany:Wiley-VCH,1998.[3] 杨傅子.近期液晶研究中的几个新方向液晶非显示应用基础研究中的进展 [J]. 物理学进展, 2008,28(2);107-129.[4] 周建伟,梁静秋,梁中翥,等.液晶调制光子晶体微腔光衰减器 [J]. 发光学报,2013,34(2):245-250.[5] Wu S T,Wu C S. Experimental confirmation of the opsitov-terentjev theory on the viscosity of nematic liquid crystals [J].Liq. Cryst.,1990,33(42):2219-2227.[6] Dark M L,Moore M H,Shenoy D K,et al.Rotational viscosity and molecular structure of nematic liquid crystals [J].Liq. Cryst.,1990,33(1):67-73.[7] Prost J, Gasparoux H.Determination of twist viscosity coefficient in the nematic mesophases [J]. Phys. Lett.,1971, 36(3):245-246.[8] Kneppe H,Schneider F.Determination of the rotational viscosity coefficient of r1 nematic liquid crystals [J]. J. Phys. E,1983,16(6):512-515.[9] Leenhouts F.Determination of the rotational viscosity from the director pattern relaxation in twisted nematic cells [J].J. Appl. Phys,1985,58(6):2180-2183.[10] Gerber P R.Measurement of the rotational viscosity of nematic liquid crystals [J]. Appl. Phys. A,1981,26(3):139-142.[11] Dietich D.Physical Properties of Liquid Crystals [M]. Germany:Wiley-VCH. 1999:387-400.

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