HG 3101-1985 Test method for effective elasticity and hysteresis loss of vulcanized rubber during extension HG3101-1985 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB 1686-85
Replaces GB1686-7
Adjusted to: 3101-1985
Test method for effective elasticity
and hysteresis loss in tension of vulcanized rubber
Rubber, usieantzod-Method o.
the-rolattva hytereots
fwt oeestoity
1985-05-24
National Standard
1986 -02-01 Implementation
National Standard of the People's Republic of China
Test method for effective elasticity and hysteresis loss of vulcanized rubber during stretching Rubber,uwtoanizid-Method,oftasttharelattue.hysteresis
fuebastieity.byielongation.
1. Test principle
0B 168685
Replaces 168679
The effective elasticity of vulcanized rubber during stretching is the ratio of the work recovered when the sample is stretched to a certain length (or a certain load is applied) to the work consumed during stretching. The hysteresis loss of vulcanized rubber during contraction is the ratio of the work recovered when the sample is stretched to a certain length (or a certain load is applied) to the work consumed during stretching. The ratio of the work lost during contraction to the work consumed during extension
2 Sample
2:2. Strip sample, length is 215.0±5.0 micron #, width is 10:0±0.5 and thickness is 8.0±.
2. The working part of the sample is 60±1.0 plus, and the mark is printed with a special load. 2:3 Sample preparation is carried out according to GB52783 "General requirements for physical test methods of vulcanized rubber" 3. The test instrumentbZxz.net
allows the test to be carried out on a tensile testing machine, and the error is not allowed to exceed 1.% 3.1
8.2 Elongation recording ratio--using 1:3.5
32: The elongation and contraction diagrams are measured with a planimeter, and the scale value is accurate to ±0.1 standard m24.. Test steps
4. Adjust the speed of the clamp under the test machine to 600±50m. 1. Put the drawing device on the testing machine. Put the paper and fix the clamps well. The transmission line of the device should be tightened and fixed. Select the appropriate range, install the corresponding weight, and adjust the slide bar of the test machine so that the load pointer 42
indicates zero
National Bureau of Standards 1985-062.4 Issued
19860201 Implementation
168685
4, 3. Install the sample on the upper and lower clamps of the testing machine so that the edge of the clamp accurately coincides with the working gauge length, and the long axis of the sample is in a straight line with the tensile direction. The specimen should not come out of the holder during the stretching process. 4. Start the test machine and stretch the specimen at a speed of 500±5.0 mm/s. When the specimen is stretched to a certain elongation or a specified load (the results of these two methods cannot be compared with each other), stop the machine and change the direction of the motor so that the lower holder runs in the reverse direction (when changing the direction of the motor, wait for the motor to stop and then run in the reverse direction immediately). At this time, the specimen also shrinks as the load gradually decreases until the load disappears completely. 4. 5. Draw the load-extension curves A, B, and C when the specimen is stretched, and draw the load-contraction curves D and E when the lower holder runs in the reverse direction as shown in the figure). 4. 6. Shape AB. The area of ​​CFE is proportional to the work consumed by the tensile specimen, and the area of ​​graph E.DCF.E is proportional to the work recovered when the specimen shrinks. 4.7 According to #, the 4 tests are repeated three times, and the fourth tensile graph is recorded. When conducting the first, second and third tensile tests, the drawing will be mounted on the scale. During the test, the starting position should be determined as the drawing reference seat. 8 After the elongation and contraction curves are drawn, the integrator is used to measure the product of the elongation and contraction curves and the horizontal axis respectively.
4.. When elongation is performed, the following elongations can be corresponded: 100%, 200%, 800.%, 500%; at this time, the corresponding distances between the two clamps are 120, 180, 240, 360mm, (use a vernier caliper to measure the distance corresponding to the elongation on the ruler, then stretch to the required distance, and obtain the graph curve). B. Test results
1686-85
51 The effective elasticity of the thinned rubber during elongation is calculated according to nk.
wherein: n
. Effective elasticity, %:
The work consumed when the specimen is stretched, expressed by the area cm2 of the graph ABCEE; E——The work recovered when the specimen is contracted, expressed by the area em2 of the graph EDCE5; Tian-footnote 8 indicating the specified elongation value or force
The hysteresis loss of vulcanized rubber shrinkage is calculated according to the following formula: 2
Wu Zhong H
Hysteresis loss, %;
-The work consumed when the specimen is stretched, expressed by the area cm of the graph ABCE; ---The work recovered when the specimen is contracted, expressed by the area m2 of the graph EDCE; K—footnote indicating the specified elongation value or force
Each group of specimens should not be less than three, and the difference between each specimen and the average value should not be greater than ±15. The total weight should not be less than 60% of the original number of specimens
6. Test report
6.1 Formula code:
Specimen type;
Specified force or extension value;
Scale range of dynamometer;
Elongation recording ratio;
Gripper running speed;
Number of stretching times;
? ． ? , load-extension curve
Additional instructions,
1686-85
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China and was managed by the Beijing Rubber Industry Research and Design Institute. This standard was drafted by the Beijing Rubber Industry Research and Design Institute. The main drafter of this standard was Chen Zhan
This standard was first issued in October 1997
This standard refers to the Soviet Union standard 0 C T252-75. "Determination method of relative hysteresis and effective elasticity of general rubber",
78-989199
el-ois yor
G81686-&
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