GB/T 3781.9: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 3781.9-2025 | English | RFQ |
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Acetylene black - Part 9: Determination of resistivity
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GB/T 3781.9-2025
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| GB/T 3781.9-2019 | English | 119 |
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Acetylene black -- Part 9: Determination of resistivity
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GB/T 3781.9-2019
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| GB/T 3781.9-2006 | English | 239 |
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Acetylene black -- Part 9: Determination of resistivity
| Obsolete |
GB/T 3781.9-2006
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| GB/T 3781.9-1993 | English | 279 |
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Acetylene black. Determination of resistivity
| Obsolete |
GB/T 3781.9-1993
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Basic data | Standard ID | GB/T 3781.9-2025 (GB/T3781.9-2025) | | Description (Translated English) | Acetylene black - Part 9: Determination of resistivity | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 3781.9-2019 | GB/T 3781.9-2019: Acetylene black -- Part 9: Determination of resistivity---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Acetylene black - Part 9. Determination of resistivity
ICS 83.040.20
G49
National Standards of People's Republic of China
Replace GB/T 3781.9-2006
Acetylene black - Part 9. Determination of resistivity
Published on.2019-08-30
2020-07-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
GB/T 3781 "acetylene black" is divided into the following parts.
---Part 5. Determination of coarse fractions;
---Part 6. Determination of apparent specific volume;
---Part 8. Determination of the amount of hydrochloric acid absorbed;
--- Part 9. Determination of resistivity.
This part is the ninth part of GB/T 3781.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 3781.9-2006 "acetylene black black part 9. determination of electrical resistivity", and GB/T 3781.9-2006
The main technical changes are as follows.
---Modified normative references (see Chapter 2);
--- Removed the "Note" of 5.1;
--- Change the drying temperature of the sample from (105 ± 2) °C to (125 ± 2) °C (see 5.2, 7.2);
--- Modified "slowly add 50cm3 dibutyl phthalate" as "using a cylinder to measure 50cm3 dibutyl phthalate slowly
Join" (see 7.4);
--- Added "other speeds can be used if the parties agree," to apply to more needs (see 7.7);
--- Added "End of test, wash the cell with ethanol, stand by" (see 7.9).
This part was proposed by the China Petroleum and Chemical Industry Federation.
This part is under the jurisdiction of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35).
This section drafted by. Shandong Nster Carbon Black Co., Ltd., Zhonghao Heiyuan Chemical Research and Design Institute Co., Ltd., Qingdao Black Cat Charcoal
Technology limited liability company.
The main drafters of this section. Zhang Jianmin, Liu Jian, Wang Hong, Nie Suqing.
The previous versions of the standards replaced by this section are.
--- GB/T 3781.9-1983, GB/T 3781.9-1993, GB/T 3781.9-2006.
Acetylene black - Part 9. Determination of resistivity
Cautions - Personnel using this section should have hands-on experience in formal laboratory work. This section does not point out all possible security questions.
question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set by the relevant national regulations.
1 Scope
This part of GB/T 3781 specifies the method for determining the electrical resistivity of acetylene black.
This section applies to acetylene black.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 3780.8 Carbon black - Part 8. Determination of heat loss
GB/T 3782 acetylene black
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 12804 laboratory glass instrument cylinder
GB/T 12827 standard reference acetylene black and identification method
3 Principle
The sample is placed in a basic insulating dibutyl phthalate, which is dispersed uniformly and formed into a stable shape by the action of a power agitator.
The fixed suspension measures the resistivity of the suspension to characterize the strength of the conductivity.
4 reagents and materials
4.1 Dibutyl phthalate, analytically pure.
4.2 Ethanol, 95% by volume, chemically pure.
4.3 Standard reference acetylene black, SRAB1, GB/T 12827.
5 instruments
5.1 Resistivity meter, accurate to 0.01 Ω·m. The cell specifications are shown in Figure 1.
5.2 Oven, gravity convection type, temperature can be controlled at (125 ± 1) °C, temperature uniformity ≤ ± 5 °C.
5.3 Vacuum dryer with an effective desiccant.
5.4 Analytical balance with a resolution of 0.1 mg.
5.5 Measuring cylinder, capacity 50cm3, accuracy 1cm3, in line with GB/T 12804A.
5.6 beaker, 150cm3, inner diameter 55mm.
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