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Chemical Industry Standard of the People's Republic of China
HG/T2363-92
Test method for kinematic viscosity of silicone oil
Published on October 7, 1992
Ministry of Chemical Industry of the People's Republic of China
Implementation on May 1, 1993
Chemical Industry Standard of the People's Republic of China
Test method for kinematic viscosity of silicone oil
Subject content and scope of application
This standard specifies the test method for determining the kinematic viscosity of silicone oil using a Pinnacle glass capillary viscometer. This standard applies to the determination of the kinematic viscosity of silicone oil not greater than 10°mm/s 2 Reference standards
Technical conditions for glass capillary viscometer
SY3607
JJG155 Verification procedures for working capillary viscometer Method summary
HG/T236392
At a constant temperature of 25°C, measure the time it takes for a certain volume of liquid to flow through a calibrated glass capillary viscometer under gravity. The product of the capillary constant of the viscometer and the flow time is the kinematic viscosity of the liquid measured at this temperature. 4 Reagents
4.195% ethanol (GB679);
4.2 Toluene (GB684);
4.3 Chromic acid cleaning solution: Dissolve 70g of potassium dichromate (GB1609) in 1000mL of concentrated sulfuric acid (GB625). 5 Instruments and Materials
5.1 Ping's Viscometer
The inner diameters of the capillary tubes are 0.4, 0.6, 0.8, 1.0, 1.2, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 5.0, and 6.0 mm, respectively. They shall conform to the requirements of SY3607 and be calibrated and constants shall be determined according to JG155. For detailed specifications, see Figures 1 and 2. The Ministry of Chemical Industry of the People's Republic of China approved the standard on October 7, 1992. The standard is available on the eeo website. Various standards and industry materials are charged and implemented on May 1, 1993
@40±2
@18±1
@18±1
Figure 1 Capillary Viscometer
(Capillary Tube inner diameter is 0.4~4.0mm)
4 capillary; 2, 3, 5-expansion part; HG/T2363-92
1, 6-tube body; 7-branch; α, b-marking line 5.2 Constant temperature bath
Outer 09±1
Outer 09±
Figure 2 Capillary viscometer
(capillary inner diameter is 5.0~6.0mm)
4-capillary; 2, 3, 5-expansion part; 1, 6-tube body; 7-branch: a, b-marking line 08
Constant temperature bath with transparent wall or observation hole, height not less than 180mm, volume not less than 2L, and equipped with automatic stirring device and electric heating device for adjusting temperature. The temperature control accuracy shall not exceed ±0.IC. 5.3 Thermometer
Use a calibrated and corrected mercury thermometer or other temperature measuring instrument with a graduation value of no more than 0.1C. 5.4 Timer
Use a stopwatch or other timing instrument with a graduation value of no more than 0.1s, and its accuracy shall be within ±0.07%. 5.5 Others
Electric oven or hair dryer, ear bulb or other pressure reducing device, viscometer clamp, plumb line or other vertical adjustment device, latex tube, etc. 6 Test steps
6.1 Sample treatment
Samples containing mechanical impurities should be filtered in advance. 6.2 Selection of viscometer
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When measuring the kinematic viscosity of the sample, the appropriate viscometer should be selected according to the approximate range of the sample viscosity, so that the flow time of the sample is not less than 200s, and the flow time of the viscometer with a capillary inner diameter of 0.4mm shall not be less than 350s. 6.3 Cleaning and drying of viscometer
For newly purchased, long-term unused or dirty viscometers, soak them in chromic acid cleaning solution for more than 2 hours, and then wash them with tap water and distilled water in turn. After each measurement, the viscometer can be soaked in toluene or other appropriate solvents for several hours, and then rinsed with tap water. Then, wash with 95% ethanol and distilled water in turn until there is no water droplets on the inner wall. The cleaned viscometer is placed in an oven, dried at 105 ± 2°C, cooled to room temperature, and the tube mouth is wrapped with filter paper and stored for use. 6.4 Loading of sample
Load the sample into a clean and dry capillary viscometer whose inner diameter meets the requirements of Article 5.1. As shown in the figure, before loading the sample, first put the latex tube on the branch pipe mouth 7, and block the mouth of the tube body 6 with your finger. At the same time, turn the viscometer upside down, and then insert the tube body 1 into the container containing the sample. At this time, use an ear bulb or other decompression device to suck the liquid to the mark b. At the same time, be careful not to create bubbles in the liquid in the tube body 1 and the expansion parts 2 and 3. When the liquid level reaches the mark b, lift the viscometer from the container and quickly return to normal state. At the same time, wipe off the excess sample on the outer wall of the tube end of the tube body 1, and remove the latex tube from the branch pipe 7 and put it on the tube body 1. 6.5 Installation of the instrument
Immerse the viscometer with the sample in the prepared constant temperature bath and fix the viscometer on the bracket. The bath temperature is maintained at 25±0.1°C and the constant temperature is maintained for at least 15 minutes. Note that when fixing the viscometer, the expansion part 2 of the viscometer must be immersed at least half, and the thermometer must be fixed with another clamp. Make sure the position of the mercury ball is close to the center point of the capillary. 6.6 Determination of the sample
6.6.1 Adjust the viscometer to a vertical state and use a plumb line to observe the verticality of the capillary from two perpendicular directions. 6.6.2 Use the latex tube covered by the capillary viscometer tube body 1 to suck the sample into the expansion part 2 so that the sample liquid level is slightly higher than the mark &, and be careful not to allow bubbles to form in the liquid in the capillary and the expansion part. 6.6.3 Allow the sample to flow freely and observe the flow of the sample in the tube. When the liquid level just reaches the mark α, start the stopwatch and start timing; when the liquid level just reaches the mark b, stop timing. 6.6.4 Use a stopwatch to measure the flow time. This should be repeated at least four times. The difference between the flow time measured each time and its arithmetic mean should not exceed ±0.5% of the arithmetic mean.
Then, take the arithmetic mean of the flow time of not less than three times as the average flow time of the sample. Result calculation
At a temperature of 25C, the kinematic viscosity 2s of the sample is calculated according to the following formula: V2s =C· 25
Where: v25————the kinematic viscosity of the sample at 25℃, mm2/s; C-viscometer constant, mm2/s;
t2s—the average flow time of the sample, S.
Example: The viscometer constant is 0.8148mm2/s, and the flow time of the sample at 25℃ is 263.6, 263.4, 263.6, 261.4s. Therefore, the arithmetic mean of the flow time (s) is 2
The flow time (s) of each time is equal to the average The allowable difference of the average flow time is equal to: 263.0×0.51.4
Standard loss network baboea.comHG/T2363-92
Because the difference between 261.4 and the average flow time exceeds 1.4s, this reading should be discarded. Only the readings of 263.6, 263.4, and 263.6s are used to calculate the average flow time. The difference between them and the arithmetic mean does not exceed 1.4s, so the average flow time (s) is:
263.6+263.4+263.6
The result of kinematic viscosity (mm2/s) of the sample is: 263.5
2s=C.t2s=0.8148×263.5-214.78Precision
The following data are used to judge the reliability of the measurement results (95% confidence level)8.1 Repeatability
The difference between the results of two parallel measurements of the same sample by the same operator in the same laboratory shall not be greater than 1% of the arithmetic mean .0%.
8.2 ReproducibilitybzxZ.net
Different operators, in different laboratories, use different viscometers of the same model to measure the same sample. The difference in the results shall not exceed 2.0% of the arithmetic mean.
9 Report
9.1 The viscosity measurement result data shall be taken to four significant figures. 9.2 The arithmetic mean of the results of two parallel measurements shall be taken as the kinematic viscosity of the sample. Additional remarks:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Plastic Resin Products Branch of the National Plastic Standardization Technical Committee (TC15/SC4). This standard is drafted by the Chengdu Organic Silicon Application Research Center of the Ministry of Chemical Industry. The main drafters of this standard are Ma Susu and Li Chenggang. This standard refers to the American Society for Testing and Materials standard ASTMD4283-83 "Standard Test Method for Viscosity of Silicone Oil" standard.b2soeo.com All kinds of standard industry data are free to download. People's Republic of China
Chemical Industry Standard
Test method of kinematic viscosity of silicone oil
HG/T2363-92
Chemical Industry Standard Editorial Department
(Chemical Industry Standardization Research Institute)
Postal code: 100013
Chemical Industry Standardization Research Institute
Copyright reserved. No printing allowed
Format 880×12301/16
Number of sheets 8000
First edition in May 1993
First printing in May 1993
Number of prints 1500
Standard Exchange Network·wwbsoes.cm
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