Mechanical property prediction method for non-isothermal vulcanization of rubber material

A rubber material and performance prediction technology, which is used in the analysis of materials, testing the strength of materials with stable torsion, and testing the strength of materials with stable tension/pressure. Simple, avoid systematic errors, reduce the effect of errors

Pending Publication Date: 2022-01-14
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to certain errors in the temperature rise curve prediction model, this method also has certain errors in various steps such as vulcanization and sample preparation, and the steps are more complicated and time-consuming.

Method used

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  • Mechanical property prediction method for non-isothermal vulcanization of rubber material
  • Mechanical property prediction method for non-isothermal vulcanization of rubber material
  • Mechanical property prediction method for non-isothermal vulcanization of rubber material

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preparation example Construction

[0059] In the present invention, the preparation method of the rubber material preferably includes:

[0060] The components in the rubber material are mixed according to the proportion by weight.

[0061] The present invention has no special limitation on the mixing method, and those skilled in the art can perform mixing with a suitable process according to different rubber materials.

[0062] In the present invention, the rubber material is preferably a cylindrical sample cut according to the test standard (RPA test); the quality of the rubber material is preferably 5.5-6.5g, more preferably 5.8-6.2g, most preferably 6g.

[0063] In the present invention, the reappearance method of the non-isothermal vulcanization process preferably includes:

[0064] During the vulcanization process of the rubber material, the temperature change curve is obtained by means of temperature measurement;

[0065] Select data points on the variable temperature curve to connect to form a recurre...

Embodiment 1

[0096] During the trial production process of an aviation tire (vulcanization stage), the temperature change curve is obtained by measuring the temperature with a thermocouple, and a data point is taken every 5 minutes, and connected into a recurrence curve, such as figure 1 shown.

[0097] Take 6g of the tire carcass rubber compound sample to make the RPA sample, according to figure 1 The recurrence curve shown is vulcanized in RPA; after the vulcanization is completed, the temperature is kept at 70°C for 10 minutes, and the strain is scanned at 70°C and 100cpm in the strain range of 5% to 70% to obtain the torque-strain curve, as shown in figure 2 shown.

[0098] According to the above formula, the torque is substituted into the calculation to obtain the stress-strain curve, which is compared with the stress-strain curve obtained by the tensile test according to the test standard GB / T 528, such as image 3 shown.

[0099] The results show that the prediction result of th...

Embodiment 2

[0101] In the trial production process of an aviation tire (vulcanization stage), the temperature change curve is obtained by measuring the temperature with a thermocouple; a data point is taken every 5 minutes, and connected into a recurrence curve, such as Figure 4 shown.

[0102] Take 6g of the tire carcass rubber compound sample to make the RPA sample, according to Figure 4 The recurrence curve shown is vulcanized in RPA; after the vulcanization is completed, the temperature is kept at 70°C for 10 minutes, and the strain is scanned at 70°C and 100cpm in the strain range of 5% to 70% to obtain the torque-strain curve, as shown in Figure 5 shown.

[0103] According to the above formula, the torque is substituted into the calculation to obtain the stress-strain curve, which is compared with the stress-strain curve obtained by the tensile test according to the test standard GB / T 528, as shown in Figure 6 shown.

[0104] The result shows that the prediction result of the...

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Abstract

The invention provides a mechanical property prediction method for non-isothermal vulcanization of a carcasscompoundmaterial. The method mainly comprises a method for reproducing a non-isothermal vulcanization process through RPA and a method for predicting the stress at definite elongation of a vulcanized rubber through RPA strain scanning, wherein the vulcanized rubber stress at definite elongation is obtained from a temperature rise curve in a vulcanization process at a time in a mode of establishing a numerical relationship model of RPA test torque and stress at definite elongation. The method provided by the invention is simple to operate, high in experimental efficiency, good in repeatability and extremely high in prediction accuracy, and is suitable for reproduction and analysis of non-isothermal vulcanization and rapid detection of the tensile property of vulcanized rubber.

Description

technical field [0001] The invention belongs to the technical field of rubber industry, and in particular relates to a method for predicting the mechanical properties of non-isothermal vulcanization of rubber materials, in particular to a method for predicting the mechanical properties of non-isothermal vulcanization of aviation tire carcass rubber materials. Background technique [0002] Vulcanization is the last process in which rubber materials are finally formed into rubber products, which has an important impact on the performance and service life of products. In order to meet the characteristic requirements of the part rubber, it is necessary to determine and control the vulcanization process of the rubber product. During the vulcanization process of thick rubber products such as tires, due to the poor conductor properties of the rubber, the temperature at different positions inside it is different, and the temperature changes are different, which is a typical non-isot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/22G01N3/08G01N3/02G01N1/28
CPCG01N3/22G01N3/08G01N3/02G01N1/28
Inventor 杨小牛张欣宇王晓建郇彦孙洪国
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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