GB/T 3401-1999 Determination of viscosity of polyvinyl chloride resin dilute solution
Some standard content:
ICS 83.0BC.20
National Standard of the People's Republic of China
GB/T 3401—1999
eqv Is0 1628-2:1988
Determination of viscosity number of polyvinyl chloride resin dilute solution
Determination of viscosity number of polyvinyl chloride resin dilute solution1999-09-16
Implementation on 2000-06-01
Issued by the State Administration of Quality and Technical Supervision
GB/T 3401--1599
This standard is used for 801282:100 Plastics Determination of Limiting Viscosity Part 2: Recording of 3, the main differences are as follows: The diameter of the viscometer tube is different. IS stipulates that the tube diameter can be 0.58mm or 0.73mm, this standard stipulates that the tube diameter is 0.77am, and the sample weight is different. S0 stipulates 0.25C. This standard stipulates "225: The actual monitoring error is different, 1 door does not require a sample, This standard is a revision of B/T 3401-1982 (Determination of the performance of polyolefin resin liquids). Compared with the previous version, the main differences are: the kinematic viscosity of the liquid at 25°C varies between (2.05~2.3)×10-\m*/a. The previous version is chemically modified. This version has revised requirements for the content of volatile matter in the product. From the date of implementation of this standard, it will replace GB/3401-1982. The appendix of this standard is revised. A is the appendix of the standard, B is the appendix of the standard: This standard is issued by the former Ministry of Chemical Industry of the People's Republic of China. This standard is issued by the Technical Committee for Standardization of Plastics (TC16/SC7): Jinxi Chemical Research Institute, Tianjiang Chemical Industry, Shihai Alkali Chemical Co., Ltd. The main contributors of this standard are: Ma Zhanguo, Ben Caisa, Qu Yunfang, Li Gongmo, Zhi Zai. This standard was first issued in December 2012.
G/T34011 999
ISO
ISO (International Organization for Standardization) is a joint organization of national standards institutes (ISO member bodies). The work of ISO is carried out by technical committees. Members interested in items for which technical committees have been established have the right to register for membership in such technical committees. International organizations, both governmental and non-governmental, in contact with TS may also participate in the work. TS) collaborates closely with the International Electrotechnical Commission (IEC) in all aspects of electrotechnical standardization. Before the draft international standard submitted by the technical committee is approved as an international standard by the ISO test committee, it is first circulated to the member groups for voting opinions: it is required that the member groups pay for the final approval before it can be published as an international standard. International Standard TS)12-2 is determined by the /TC1 Plastics Technical Committee. All international standards will be revised over time. Users can explore the possibility of using the new version of the international standard referenced in this standard. Unless otherwise specified, ISO128 includes the following parts, which together constitute A series of standard plastics - Determination of viscosity and limiting viscosity: Part 1: General conditions
Part 2, Ethylene glycol
Part 3, Ethylene glycol and polypropylene
Part 4: Reading and folding plastics - Part 5: Dialkyl phthalates - Part 6, Composition of butyl phthalates in isocyanate, Scope
National Standard of the People's Republic of China
Dilute solutions of polyoxyethylene resins
Determinnation ofylscositynumberofPvCresls in dilule solutionCB/T34G1—1999
eq1so1628-2:1988
GH/3401—1682
This standard is applicable to the determination of cyclohexane homophiles and co-products with olefins as the main analyte 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard by being cited in this standard. After the publication of this standard, the versions shown are valid. All standards will be subscribed by the relevant departments. All parties using this standard should report the applicability of the next version of the standard. GB/T 1632-1993 Determination of viscosity and characteristics of polymer sieve liquids (IDT [51$28-1:1964] GH/18170-1987 Grid value matching rules
3 Definition
Viscosity number (VN, also known as specific viscosity)
The ratio of viscosity to the concentration of polymers in the liquid: VN
Its unit is:
In the national unit system, its unit is n\/kgTX
In actual use, one thousandth of it (10-m*/g) is often used, that is, mL/g principle
Place the sample on the test! , the root refers to the time the reagent is calculated in the capillary viscometer, in the standard household, if the change in kinetic energy can be ignored, the flow rate ratio can be used. The solvent ratio has been proved to be: at 25 °C, the kinematic viscosity is between (2.6--2.33)×10-5m*/3, and the solvent is stored in a dark bottle and slightly changed. If the reagent does not meet the requirements, it can be heated under pressure and separated between (155~155). 6 Instrument
6. 1 Any of the following
) method,
) method with a sensor set, the first practical titration, m mountain. Guohao Quality and Technical Supervision Point 1999-0916 approved 2001-06-01 implementation
CB/T 3401:1999
6.2 or cut sand core leak; 2# potential effect glass (can also use stainless steel screen with a larger diameter). 6.3 Wood custom change: need to maintain (25±0.5)°C. 6.4 Keep the 25ml volumetric flask and its contents (or 1uml shaped flask and its contents) at (80~65>°C in a constant temperature bath 6.5 Viscometer, Ubbelohde viscometer, capillary activity is (J.\-0.(1S)TI. For other processing specifications, see Figure 1 in GH/T1632 Ubbelohde viscometer, as shown below.
EF-test line center.H—liquid scale:R —Vertical: 0.7F=,051mm_—Capacity: .2
6.6Full bottle: 1000m.I.
6.7Minutes and a half: 0.0001~6.8sPrecision run 0.1:.
7Sampling
For the sample to be tested, the design should be representative. There should be enough parallel samples for testing. In addition, for the volatile matter (including water), the sample must be condensed and treated under combustion. 8 8.1 Preparation of solution for determination of the amount of cyclohexanone 8.1.1 Method 1 Weigh 125 ± 21% of the total amount of cyclohexanone in a 35 ml volumetric flask, add about 1% cyclohexanone, gently stir to avoid the formation of a condensate, and keep the solution in a constant temperature for 1 hour. Then cool to room temperature. Place the solution in a water bath at a constant temperature of 1 cm (55°C) and dilute to the mark with the selected cyclohexanone. 8.1. 2 Method 2
Weigh (C.125±0.035) g1 and mix well! Add C.C2 to the viscometer accurately, and add the amount of C.C2 to the viscometer, or GB/T34011999
U.005/mL of reduction (see Appendix A): At the same time, gently stir by hand to avoid caking, and keep it at (885) °C at a temperature of 1 h. After the temperature is completely cooled, take out the chain flow chamber and set it aside. 8 2 Determination of flow time
Connect the latex tube to the viscometer tube M and N, and place the viscometer vertically at (25±0. U5) (in a constant temperature water bath, make the water surface 20m above the D ball. Use a No. 2 glass core funnel to put about 15mL of cyclohexane into the viscometer. Keep the temperature constant for 10min. Tighten the latex tube on the tube M. Slowly draw the liquid through the gas chamber on the tube. When the liquid rises to the D ball, stop pumping. Remove the suction tube and then release the latex tube to stop the liquid from flowing freely. Measure the time required from one crescent line to another. Measure the flow time three times. The range is within 0.25 to get the liquid flow time. If the difference in the set value exceeds 0.2, it is necessary to re-determine with a new solution. If the effect is still not cured, the viscometer must be cleaned and re-tested. 8.3. Determination of flow time of liquid
Use the above-mentioned deep-drying agent to absorb into the viscosity meter.
Approximately 101L of liquid should be passed through the sand core of the viscosity meter - let the narrow chain pass through the three layers, and then push the selected liquid through the centrifugal bucket into the viscosity meter, the temperature is 1)in, and then measure the flow time of the liquid according to the above steps, and the difference between two consecutive fixed values must be less than 0.25%. Note: In addition to the manual selection method mentioned above, the automatic receiver can also be used for determination. The principle is to use the light bar and the calculation rule to automatically read the flow time and directly calculate the special effect, which is less prone to human error. The results are shown in the following table: Viscosity number, tL/g 1.- The arithmetic mean of the flow time of the liquid falling 3.- The arithmetic mean of the three flow times of the liquid falling, the liquid level of the liquid falling, 0.005g/mL, tt|| When the relative deviation between the single measured value and the average value of the parallel samples is greater than .7, it must be repeated. The viscosity number result is the arithmetic mean of the parallel test results, but it is rounded to an integer according to G/T&170. 10 Test report The test report should include the following contents: a) Information on the standard used: b) Description of the test materials: c) Characteristics of the viscometer (specifications); e) Test conditions, such as time, duration of the drop and number of drops; e) Any errors that may have affected the results; f) Test date GH/T3401—1999 Appendix A (Appendix to the standard) Preparation method: 005 8/m1. Note: When cyclohexanone is prepared by the dosing method using a flask, C.003 g/mL of fluoroethylene-terminated cyclohexanone, the volume of cyclohexanone added can be calculated as follows: Va C.005 XD
Wherein: V
The amount of cyclohexanone required to be added at room temperature. m
The amount of vinyl chloride resin actually weighed
The total density at the same temperature as the twisted end water bath test temperature/D.
The density of cyclohexanone at room temperature R/cm2,
Ethylene density g/rn.
The test temperature of this standard is 25±0.5), when the temperature is (0.120~.130g), the formula (1) can be simplified as follows: V= 18. 3 ×
- 5. 09
The density at different temperatures is
, the parent
B1 Ubbelohde viscometer calibration
Cyclohexanone density + Rfem
, 0. 950 7
(Appendix of Suggestions)
Determination of the kinematic viscosity of solvent cyclohexanonebzxz.net
In (2±0.05)℃ constant temperature water, use 4~~(1.58m/m) Ubbelohde viscometer to measure the flow time t of No. 2 standard viscosity poise. Calculate the coefficient of Ubbelohde viscometer by the following formula: t
In the formula: c
is the velocity of the viscometer, m\/8:
--the kinematic velocity of No. 2 standard viscosity, m\/8; the flow time of No. 2 standard viscosity, s, 2Determination of the kinematic viscosity of solvent cyclohexanone
In (25=0.5)℃ constant temperature water, use 4~).53m/m Hall viscometer to measure the flow time 1 of solvent cyclohexanone, and calculate the kinematic viscosity of solvent cyclohexanone by the following formula: t
Where:
GB/T 3401-1999
--The kinematic viscosity of cyclohexane +m*/; the flow time of the cyclohexane is:
--Ubwell viscosity coefficient, m*/g.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.