液晶中黏度变化检测方案(粘度计)

京都電子工業株式会社KYOTO ELECTRONICSAPVS-0110enMANUFACTURING CO.，LTD. 6.Procedure Application Note Temperature dependence of viscosity of liquid crystal IndustryElectricity & electronicsInstrumentViscometerMeasurement method ：Electro Magnetically Spinning MethodStandards 1. Scope Liquid crystal is a substance has a property as a solid as well as a liquid. Also， because itchanges properties by heat and electric field， it is widely used as a liquid crystal display asapplied equipment. An example of measuring the temperature dependence of the dynamic viscosity of liquid crystalusing an EMS viscometer that can be measured by sealing， sterilization and non-contact wasshown below. 2. Precautions When performing measurement below the ambient temperature， make sure to introduce dry airto the instrument before starting measurement in order to prevent dew condensation. 3.Post-measurement procedure The sample container and the sample are discarded appropriately. 4.Apparatus EMS Viscometer Control Laptop PC Dry Air Unit Compressor 5. Reagents Sample ：5CB(4-cyano-4'-pentylbiphenyl)， Toluene (dilution solvent) 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市徐汇区宜山路333号1201室电话：021-54488867 电邮： kemu-kem@163.com 网址： http：//www.kem-china.com 1) Enter the following conditions in measurement condition of the sequence mode of controlsoftware. ◇ M e a s u r e m e n t m o d e ：Sequence mode 5CB(96.8%) 10-45℃※ 5CB(93.8%) 0-35℃※ ◇ Motor rotation speed ：1，000 rpm ◇ Measurement time ：I (1second)◇Repeat count ：20 times◇Measurement interval ：5 seconds Waiting time for temperature stability ：5 minutes 2) Place an aluminum spherical probe of p 2 mm and a sample of 300 pL in a container， coverwith a cap and packing， set the sample container in the EMS Viscometer， and click themeasurement button. 3) After the measurement is completed， return the temperature of the sample to room temperature，remove the cap， add 10 uL of toluene to the sample， lip and set the sample container into theEMS Viscometer again， and click the measurement button (5 CB (96.8%). 4) After the measurement is completed， return the temperature of the sample to room temperature，remove the cap， add 10 pL of toluene to the sample， lip and set the sample container into theEMS Viscometer again， and click the measurement button (5 CB (93.8%). ※measurement during raising the temperature 7. Example The viscous behavior near the phase transition temperature of the sample at each concentrationcan be obtained. The measurement results are shown in Figure 1 and 2. And mean， standarddeviation， and RSD of 20 times measurement results at each temperature are shown in Table1-3. The viscosity rises gradually along with a rise of the temperature at the phase transition. Themomentary temperature of the phase transition can be confirmed by changing the temperature indetail. Figure 2 shows that the sample of the lower 5CB concentration has the low temperatureof phase transition. Figure 1. Measurement result about the temperature dependence of 5CB Figure 2. Measurement result about the temperature dependence of viscosity of5CB diluted with toluene at each concentration 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市徐汇区宜山路333号1201室电话：021-54488867 电邮： kemu-kem@163.com 网址： http：//www.kem-china.com Table 1. Result of temperature dependence of 5CB Table 2. Result of temperature dependence of 5CB diluted with toluene (concentration 96.8%) Temperature℃ MeanmPa·s Standard deviation mPa's RSD% 24.7 30.8 0.1 0.3 24.8 31.0 0.1 0.2 24.9 30.6 0.0 0.1 25 30.6 0.0 0.1 25.1 30.8 0.1 0.2 25.2 31.0 0.0 0.2 25.3 31.1 0.0 0.0 25.4 30.9 0.1 0.2 25.5 30.6 0.0 0.0 26 29.8 0.0 0.0 27 28.5 0.0 0.1 28 27.1 0.1 0.2 29 25.7 0.2 0.7 30 24.5 0.0 0.0 31 23.4 0.0 0.2 32 22.4 0.0 0.0 33 21.4 0.0 0.0 34 20.5 0.0 0.0 35 19.8 0.0 0.0 36 19.0 0.0 0.0 37 18.1 0.1 0.3 38 17.4 0.0 0.0 39 16.7 0.0 0.0 40 15.9 0.0 0.0 41 15.3 0.0 0.0 42 14.7 0.0 0.0 43 14.2 0.0 0.3 44 13.6 0.0 0.0 45 13.1 0.0 0.0 京都电子工业株式会社-可睦电子(上海)商贸有限公司电话： 021-54488867 电邮： kemu-kem@163.com Table 3. Result of temperature dependence of 5CB diluted with toluene (concentration 93.8%) 14.3 39.8 0.1 0.2 8.Summarv It is possible to add dilution solvent to an undiluted solution and measure the viscosity of thesample， because the sample volume does not affect the viscosity value even if is more thanminimum required amount 300puL. A rare sample (expensive sample) can be evaluated by smallamount of sample. Moreover， as shown in Figure 1， it is possible to be observed the color change in the solutionwith built-in CMOS camera. 京都电子工业株式会社-可睦电子(上海)商贸有限公司电话： 电邮： kemu-kem@com/京都電子工業株式会社KYOTO ELECTRONICSMANUFACTURING CO.，LTD. 液晶在不同温度下黏度变化的研究 应用资料(英文版)液晶是一种既有液体属性又有固体属性的物质。此外，因为它通过热和电场改变性质，所以它作为应用设备被广泛用作液晶显示器。使用EMS粘度计测量液晶在不同温度下的动态粘度例子，该粘度计可以通过密封、灭菌和非接触来测量。