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Rubber thermo-oxidative aging dynamic testing device and method for testing thermo-oxidation absorption curve

A technology of thermo-oxidative aging and testing equipment, which is applied in the direction of measuring equipment, scientific instruments, instruments, etc., can solve the problems such as the lack of uniform rubber thermal oxidation resistance, improve the efficiency of the test and the accuracy of the test results, improve the accuracy and objectivity effect

Active Publication Date: 2015-06-17
EVE RUBBER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the prior art that there is no standard quantitative testing device for thermo-oxidative aging and ozone aging of rubber, and there is no unified index to characterize the thermal oxidation resistance of rubber, the present invention innovatively invented a rubber thermo-oxidative aging kinetics The test device and test method, the device can simulate the actual use environment, produce a constant temperature environment and a fixed oxygen pressure, and can measure the oxidation reaction induction period and oxidation reaction speed of rubber samples with different formulations, so as to compare the rubber oxidation reaction The degree, and then judge the performance of the rubber

Method used

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  • Rubber thermo-oxidative aging dynamic testing device and method for testing thermo-oxidation absorption curve

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Effect test

Embodiment 1

[0032] Rubber thermo-oxidative aging kinetics test device, including test bench 1, vacuum oxygen supply system 7, temperature control system 8, oxygen supply system 9, automatic recording system 10, wherein the test bench 1 is an integrated structure, the inside of the test bench The test chamber 2 is symmetrically arranged, the center and edge of the test bench 1 are respectively provided with a central temperature measuring sensor 6 and an edge temperature measuring sensor 6', and the periphery of the test bench 1 is provided with a heating belt 3 and an insulation layer 5 in sequence; the sealing end of the test chamber 2 is set The pressure sensor, the test chamber 2 are respectively connected with the evacuated oxygen supply system 7 and the oxygen supply system 9 , the heating belt 3 is connected with the temperature control system 8 , and the oxygen supply system 9 is connected with the automatic recording system 10 . Six test cavities are arranged symmetrically on the t...

Embodiment 2

[0034] Start the temperature control system, heat the test chamber, and stop heating when it reaches 150°C; put the samples to be tested into the test chamber after numbering, and close the test chamber; start the vacuum pumping and oxygen supply system, and first vacuum the test chambers respectively , when the pressure in the test chamber is lower than 10pa, stop vacuuming, open the gas control valve and fill the test chamber with 1 bar of oxygen; the oxygen supply system will automatically supplement oxygen to the test chamber according to the pressure value of the pressure sensor; the automatic recording system will record in time Supplement the amount of oxygen, and output the thermal oxidation curve after the test.

Embodiment 3

[0036] Start the temperature control system, heat the test chamber, and stop heating when it reaches 200°C; put the samples to be tested into the test chamber after numbering, and close the test chamber; start the vacuum pumping and oxygen supply system, and first vacuum the test chambers respectively , when the pressure in the test chamber is lower than 10pa, stop vacuuming, and then open the gas control valve to fill the test chamber with 1bar oxygen; the oxygen supply system will automatically supplement oxygen to the test chamber according to the pressure value of the pressure sensor; the automatic recording system will timely Record the amount of supplemental oxygen, and output the thermal oxidation curve after the test.

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Abstract

The invention relates to a rubber thermo-oxidative aging dynamic testing device and a method for testing a thermo-oxidation absorption curve. The testing device comprises a testing board, a vacuum-pumping oxygen-supply system, a temperature control system, an oxygenating system, and an automatic recording system, wherein the testing board is in an integrated structure, the testing chambers are symmetrically arranged in the testing board, a center temperature measurement sensor and an edge temperature measurement sensor are respectively arranged at testing board center and edge position, a heating zone and a heat-insulation layer are arranged at peripheral part of the testing board in order; a pressure sensor is arranged on a sealing end of the testing chamber, the testing chamber and the vacuum-pumping oxygen-supply system are respectively communicated, the heating zone and the temperature control system are connected, and the oxygenating system and the automatic recording system are connected. The device is capable of accurately and rapidly testing the thermo-oxidizing performance of the rubber with batches.

Description

technical field [0001] The invention relates to a high-temperature thermal oxygen absorption test device and method, in particular to a rubber thermal oxygen aging kinetic test device and method for measuring organic solid materials such as rubber and high molecular polymers. Background technique [0002] The phenomenon of aging of rubber or rubber products due to the action of heat and oxygen in the air during storage or use is called thermo-oxidative aging. Thermo-oxidative aging is the aging of various rubber and its products all the time, and it is the main cause of rubber damage. The thermo-oxidative aging of rubber is a free radical chain autocatalytic oxidation reaction. During this reaction, the structure of rubber will change, and its performance will also change accordingly. Thermal oxygen aging of rubber occurs below 200°C. Oxygen is the main factor causing aging, and heat only plays the role of activating oxidation and accelerating the oxidation rate. However, ...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N33/44
CPCG01N17/00G01N33/44
Inventor 王正戴德盈吴鹏章李柯颖
Owner EVE RUBBER RES INST
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