A method for characterizing the dry grip of silica-filled rubber compositions using RSA-G2.

Abstract

This invention relates to the field of tire rubber composition design technology, and more particularly to a method for characterizing the dry grip of silica-filled rubber compositions using RSA-G2. The method includes the following steps: 1) preparing test samples and reference samples; 2) performing temperature, frequency, and strain scans on the test samples and reference samples using an RSA-G2 solids analyzer to obtain RSA-G2 graphs of the test samples and reference samples; 3) performing mathematical analysis on the output results of the RSA-G2, subtracting the X-axis and Y-axis values ​​corresponding to the maximum and minimum values ​​of the curves respectively, and outputting ΔE' and Δε accordingly. By comparing the rate of change of the storage modulus ΔE' under unit deformation Δε, and by comparing the relationship between K, K1, and K2, the relationship between the reference sample and the test sample is compared. A larger K value indicates better dry grip performance. This method uses an RSA-G2 solids analyzer to characterize the dry grip of silica-filled rubber compositions, providing a simple and rapid method for characterizing the dry grip performance of rubber compositions.

Description

Technical Field

[0001] This invention relates to the field of tire rubber composition design technology, and more particularly to a dry grip test method for characterizing silica-filled rubber compositions using RSA-G2. Background Technology

[0002] As public awareness of low-carbon emissions increases, more and more users are paying attention to fuel consumption and carbon emissions of their vehicles. Tires, as the only component of a car in contact with the road surface, have a significant impact on safe driving due to their grip performance.

[0003] Silica can better balance the dry grip and rolling resistance of tires, and therefore, it has been widely used by major tire companies in recent years. However, the dry grip performance of tires can generally only be accurately determined through real-vehicle tire testing. Summary of the Invention

[0004] To address the challenge of rapidly characterizing the dry grip performance of tires, this invention develops a dry grip test method using RSA-G2 to characterize silica-filled rubber compositions. This method can quickly identify the difference in dry grip performance between unknown and known rubber compositions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for characterizing the dry grip of silica-filled rubber compositions using RSA-G2, the method comprising the following steps:

[0007] 1) Preparation of test samples and reference samples

[0008] 2) Temperature, frequency, and strain scans were performed on the test sample and the reference sample using an RSA-G2 solid analyzer to obtain RSA-G2 images of the test sample and the reference sample;

[0009] 3) Perform mathematical analysis on the output of RSA-G2, subtracting the X and Y axes corresponding to the maximum and minimum values ​​of the curves respectively, outputting ΔE' and Δε respectively. By comparing the rate of change of the storage modulus ΔE' under unit deformation Δε, i.e.

[0010]

[0011]

[0012]

[0013] By comparing the magnitudes of K, K1, and K2, and comparing the relationship between the reference sample and the test sample, the larger the K value, the better its dry grip performance.

[0014] Preferably, in step 1), the test sample and the reference sample are circular in size with a diameter of 2 cm and a thickness of 1 cm.

[0015] Preferably, in step 2), the temperature scan range is 0-30℃, the frequency scan range is 1-10Hz, and the strain scan range is 0.01-42%.

[0016] As a further preferred option, in step 2), the temperature scan is performed at 0°C and 30°C respectively, the frequency scan is performed at 1°C and 10°C respectively, and the strain scan range is selected from 0.01-10%.

[0017] Preferably, the rubber composition filled with silica in the test sample and the reference sample is selected from a rubber composition containing 60-160 phr silica.

[0018] Furthermore, the present invention also discloses the application of the method in screening silica formulations in tire rubber compositions for dry grip performance.

[0019] Furthermore, the present invention also discloses a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement steps 2) and 3) of the method.

[0020] Furthermore, the present invention also discloses a computer-readable storage medium storing a computer program or instructions thereon, which, when executed by a processor, implements steps 2) and 3) of the method.

[0021] Furthermore, the present invention also discloses a computer program product, including a computer program or instructions, which, when executed by a processor, implement steps 2) and 3) of the method.

[0022] Because the present invention adopts the above-mentioned technical solution, it uses the RSA-G2 solids analyzer to characterize the dry grip of silica-filled rubber compositions, which can simply and quickly characterize the dry grip performance of rubber compositions. Attached Figure Description

[0023] Figure 1 RSA-G2 schematic diagram of the reference sample and test sample 1.

[0024] Figure 2 RSA-G2 schematic diagram of reference sample and test sample 2.

[0025] Figure 3 A schematic diagram of RSA-G2 mathematical analysis of the reference sample and test sample 1.

[0026] Figure 4A schematic diagram of RSA-G2 mathematical analysis of the reference sample and test sample 2. Detailed Implementation

[0027] The technical solutions of the present invention will be thoroughly reviewed and described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort, based on the embodiments of the present invention, are within the scope of protection of the present invention.

[0028] A method for characterizing the dry grip of silica-filled rubber compositions using RSA-G2, the method comprising the following steps:

[0029] 1) Preparation of test samples and reference samples

[0030] The test sample and the reference sample were circular in size, with a diameter of 2 cm and a thickness of 1 cm.

[0031] 2) Temperature, frequency, and strain scans were performed on the test sample and reference sample using an RSA-G2 solid analyzer to obtain RSA-G2 graphs of the test sample and reference sample; temperature scans were performed at 0℃ and 30℃ respectively, frequency scans were performed at 1℃ and 10℃ respectively; strain scans were performed within the range of 0.01-10%;

[0032] 3) Perform mathematical analysis on the output of RSA-G2, such as... Figure 3 , Figure 4 As shown, the differences between the X and Y axes corresponding to the maximum and minimum values ​​of the curve are calculated, and the corresponding outputs are ΔE' and Δε. By comparing the rate of change of the storage modulus ΔE' under a unit deformation Δε, we can determine the value of the storage modulus ΔE'.

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[0034]

[0035]

[0036] By comparing the magnitudes of K, K1, and K2, and comparing the relationship between the reference sample and the test sample, the larger the K value, the better its dry grip performance.

[0037] For reference, the present invention Figure 1 and Figure 2 The graph shown is an RSA-G2 plot comparing the dry grip performance of a reference sample of a known rubber composition and a test sample of an unknown rubber composition. According to... Figure 1 and Figure 2The curves of the reference sample and the test sample show that they decrease from the highest point, but the magnitude of the decrease is different. For the same strain change, the change in storage modulus E' also shows different results. This can be understood as follows: under the action of external force, as the strain increases (from a small strain of 0.01% to a large strain of 10%), the network structure of the filler collapses and is destroyed. The modulus change of the test sample is smaller than that of the reference sample, indicating that the dry grip performance of the test sample is better than that of the reference sample.

[0038] The raw material composition of the test sample of this invention is as follows: 101.5 parts solution-polymerized styrene-butadiene rubber, 36.0 parts emulsion-polymerized styrene-butadiene rubber, 1165MP silica and 1115MP silica as shown in Table 1, 8 parts TESPD silane coupling agent, 3.0 parts zinc oxide, 1.0 part stearic acid, 2.0 parts accelerator DPG, 1.0 part antioxidant TMQ, 1.5 parts antioxidant 6PPD, 1.5 parts microcrystalline wax, 1.5 parts accelerator CZ, 0.5 parts accelerator TBzTD, and 1.6 parts sulfur.

[0039] Among them, solution-polymerized styrene-butadiene rubber, SBR 3824, is a product of LG Chem Ltd.; 1165MP silica, Solvay Ltd., and 1115MP silica, Solvay Ltd., are products of Solvay Ltd.; TESPD silane coupling agent is a product of Zhejiang Jinmao Rubber Additives Co., Ltd.; the rest of the products are commercially available.

[0040] The composition and test data of the silica used in the experiment of this invention are shown in Table 1.

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[0042]

[0043] By comparing the magnitudes of K, K1, and K2, the relationship between the reference sample and the test sample can be easily and quickly compared. The larger the K value, the better its dry grip performance.

[0044] The foregoing description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A method for characterizing the dry grip of a silica-filled rubber composition using RSA-G2, characterized in that, The method includes the following steps: 1) Preparation of test samples and reference samples 2) Temperature, frequency, and strain scans were performed on the test sample and the reference sample using an RSA-G2 solid analyzer to obtain RSA-G2 images of the test sample and the reference sample; 3) Perform mathematical analysis on the output of RSA-G2, subtracting the X and Y axes corresponding to the maximum and minimum values ​​of the curves respectively, outputting ΔE' and Δε respectively. By comparing the rate of change of the storage modulus ΔE' under unit deformation Δε, i.e. By comparing the magnitudes of K, K1, and K2, and comparing the relationship between the reference sample and the test sample, the larger the K value, the better its dry grip performance.

2. The method for testing the dry grip of a silica-filled rubber composition using RSA-G2 according to claim 1, characterized in that, In step 1), the test sample and the reference sample are circular in size, with a diameter of 2 cm and a thickness of 1 cm.

3. The method for testing the dry grip of a silica-filled rubber composition using RSA-G2 according to claim 1, characterized in that, In step 2), the temperature scan range is 0-30℃, the frequency scan range is 1-10Hz, and the strain scan range is 0.01-42%.

4. The method for testing the dry grip of a silica-filled rubber composition using RSA-G2 according to claim 1, characterized in that, Step 2) Temperature scan: 0℃ and 30℃ respectively; frequency scan: 1℃ and 10℃ respectively; strain scan range: 0.01-10% respectively.

5. The method for testing the dry grip of a silica-filled rubber composition using RSA-G2 according to claim 1, characterized in that, In the test and reference samples, rubber compositions filled with silica were selected from those containing 60-160 phr silica.

6. The application of the method according to any one of claims 1-5 in the formulation of silica in tire rubber compositions for screening dry grip performance.

7. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement steps 2) and 3) of the method according to any one of claims 1-5.

8. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed by the processor, they implement steps 2) and 3) of the method described in any one of claims 1-5.

9. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by the processor, they implement steps 2) and 3) of the method described in any one of claims 1-5.

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