This standard specifies the method for determining the apparent density of rubber antioxidants and vulcanization accelerators using a cylinder and piston device. This standard is applicable to the determination of the apparent density of solid samples of rubber antioxidants and vulcanization accelerators. GB/T 11409.6-2003 Determination of the apparent density of rubber antioxidants and vulcanization accelerators GB/T11409.6-2003 Standard download decompression password: www.bzxz.net

GB/T11409.6—2003
This standard is equivalent to 6.8\Apparent density" in the Japanese Industrial Standard JISK6220:1995 "Test Methods for Rubber Compounds", and is revised from the national standard GB/T11409.6--1989 "Determination of Apparent Density of Rubber Antioxidants and Vulcanization Accelerators". There is no technical difference between this standard and JISK6220-1995. The main technical differences between this standard and GB/T11409.6-1989 are: the name of the test device is changed from "cylinder" to "cylinder"; the calculation formula is improved and the explanation of the formula is modified in accordance with the Japanese Industrial Standard ; Editorial revisions have been made to the description of the determination steps. This standard replaces GB/T11409.6--1989 from the date of implementation. This standard was proposed by the former State Bureau of Petroleum and Chemical Industry. This standard is under the jurisdiction of the Chemical Additives Sub-Technical Committee of the National Technical Committee for Standardization of Rubber and Rubber Products. The main drafting unit of this standard: Shanxi Chemical Research Institute. The main drafter of this standard: Bai Runling.
This standard was first issued on March 27, 1989. 97
National Standard of the People's Republic of China
Rubber Antiaging Agents, Vulcanizing Accelerators
Determination of Apparent Density
Test method of apparent density for rubberantiagers and yulcanizing acceleratorsGB/T 11409. 6—2003
Replaces GB/T11409.6-·-1989
Warning: Personnel using this standard should be familiar with formal laboratory operating procedures. This standard does not intend to involve all safety issues that may arise from the use of this standard. It is the responsibility of the user to formulate appropriate safety and health systems and ensure compliance with national regulations. 1 Scope
This standard specifies the method for determining the apparent density of rubber antioxidants and vulcanization accelerators using a cylinder and piston device. This standard applies to solid rubber antioxidants and vulcanization accelerators. Determination of the apparent density of the sample. 2 Principle
Under constant pressure, the volume of the sample is measured, and the apparent density is calculated based on the ratio of mass to volume. 3 Instrument
3.1 Piston [as shown in Figure 1 (a)]: a hollow cylinder with an outer diameter of (21.80±0.05) mm, a length of 115 mm, and a mass of 190 g, made of general steel.
3.2 Cylinder [as shown in Figure 1 (b)]: an inner diameter of (22.00±0.05) mm, an inner depth of 100 mm, made of general steel. p21. 80
(a) Piston
3.3 Vernier caliper.
Figure 1 Apparatus for measuring apparent density
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 2003-01-1098
(b) Cylinder
Implemented on 2003-07-01
4 Determination steps
GB/T11409.6—2003
Align the piston with the cylinder and let it fall naturally. Use a vernier caliper to measure the size Hi exposed at the top, accurate to 0.01cm. Then pull out the piston, accurately weigh 1g5g of the sample (weighing to 0.1g) and slowly pour it into the cylinder, gently shake the cylinder or knock on the outer wall of the cylinder to make the sample adhering to the inner side of the cylinder fall to the bottom of the cylinder, so that the sample in the cylinder remains horizontal, and then slowly put the piston in, so that the piston slowly falls with the help of fingers. In principle, the time for the piston to fall and contact the surface of the sample is 5$. At this time, you must feel that the piston contacts the surface of the sample, gently rotate the piston 1 circle, or gently knock on the outer wall with a wooden board, and then measure the size H2 exposed at the top of the piston, accurate to 0.01cm. Expression of analysis results
The apparent density G of the sample is calculated according to formula (1): G=
(H, - H,) X 0.785 4D2
Wherein: G--apparent density, g/cm2;
m--mass of the sample, g;
H, exposed dimension of the piston when the sample is present, cm2; Hi--exposed dimension of the piston when blank, cm2; D--cylinder inner diameter, cm2. wwW.bzxz.Net
Take the arithmetic mean of 3 to 5 measured values ​​as the measurement result. (1)
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