SH/T 0566-1993 Determination of Thickening Ability of Lubricant Viscosity Index Improvers

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Card type: Test method

1. Method number / full name / English name / replacement relationship

• Method number: SH/T 0566-93
• Full name: Determination of Thickening Ability of Lubricant Viscosity Index Improvers
• English name: not provided in the available source
• Replacement relationship: not provided in the available source (the source notes "(confirmed in 2004)")
• Approval/implementation: approved by China Petrochemical Corporation in 1993-08-19, implemented in 1994-05-01

2. Applicable scope and non-applicability

• Applicable: various types of high-molecular-polymer viscosity index improvers.
• Not applicable: not provided in the available source.

3. Method principle

According to method SH/T 0034, separate the active components in the sample, dry and constant-weight them, weigh a certain amount of the sample active components, dissolve them in 150SN neutral oil, respectively determine the 100℃ kinematic viscosity of the 150SN neutral oil before and after adding the sample active components, and obtain the kinematic viscosity increase value by calculation.

4. Reagents and materials (purity / preparation)

• Base oil: 150SN neutral oil produced from paraffinic Daqing crude oil (5.2).
• Other reagents: not provided in the available source.

5. Instruments and equipment

• Beaker: 100 mL (5.1.1, the source writes "IOOML").
• Analytical balance: sensitivity 0.1 mg (5.1.2, the source writes "0.1 Mg").
• Kinematic viscosity tester: meets the requirements of GB/T 265 (5.1.3).
• Rubber membrane sleeve permeation apparatus: meets the requirements of SH/T 0034 (5.1.4).
• Electric furnace and voltage regulator (5.1.5).

6. Recommended operating conditions

• Dissolution heating temperature: 120℃ ± 50℃ (the source writes "120`1C t 50C", requires confirmation against the source standard (source-text extraction)).
• Dissolution method: stir and heat on an electric furnace to fully dissolve, mix evenly and set aside; the reserved test oil must not be filtered (7.1).
• Viscosity measurement temperature: 100℃ (7.2).

7. Sampling and sample preparation

• Treatment of the rubber membrane sleeve: carry out according to the relevant content in SH/T 0034 (6.1).
• Sample treatment: carry out according to the relevant content in SH/T 0034 (6.2).
• Separation of sample active components: weigh sample 10 g ± 0.1 g (the source writes "log * 0.1 g", requires confirmation against the source standard (source-text extraction)), carry out membrane dialysis separation of the sample according to the requirements of SH/T 0034, and collect the active components in the sample for later use (6.3).

8. Analytical procedure

• 7.1 In a 100 mL beaker, weigh the separated active components 0.10 g (weigh accurately to 0.0004 g), add 9.90 g (weigh accurately to 0.0004 g) of filtered 150SN neutral oil, stir and heat on an electric furnace, control the temperature at 120℃ ± 50℃ (requires confirmation against the source standard (source-text extraction)), to fully dissolve, mix evenly and set aside; the reserved test oil must not be filtered.
• 7.2 According to the provisions of GB/T 265, determine the 100℃ kinematic viscosity of the reserved test oil in clause 7.1, and at the same time determine the 100℃ kinematic viscosity of the 150SN neutral oil to which no sample active components have been added.

9. Qualitative and quantitative determination and calculation formula

The thickening ability X of the sample (mm²/s) is calculated according to the following formula:

X = v − v₀

Where:

• v₀ —— the 100℃ kinematic viscosity of the 150SN neutral oil used, mm²/s;
• v —— the 100℃ kinematic viscosity of the 150SN neutral oil containing 1% (m/m) sample active components, mm²/s.

Note: In the formula area of the source, source-text extraction is written as "X = v [unreadable sign]1 / 10", which is inconsistent with the symbol explanation below, requires confirmation against the source standard (source-text extraction).

10. Precision

Judge the reliability of the test results according to the following provisions (95% confidence level):

• 9.1 Repeatability: the difference between two results obtained by the same operator in repeated determinations shall not be greater than 0.150 mm²/s (the source writes "0.150.Z/so", requires confirmation against the source standard (source-text extraction)).
• 9.2 Reproducibility: the difference between two test results respectively submitted by two laboratories shall not be greater than 0.265 mm²/s (the source writes "0. 265.2/r.", requires confirmation against the source standard (source-text extraction)).

11. Report

Take the arithmetic mean of two repeated determination results as the determination result, and report the result to four significant figures.

12. Referenced documents

• GB/T 265 Petroleum products — Determination of kinematic viscosity and calculation of dynamic viscosity
• SH/T 0034 Right x in additives O 4p[garbled title fragment] (the source title source-text extraction is severely distorted, requires confirmation against the source standard (source-text extraction))

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick reference Q&A