An evaluation method, device and computer program product for evaluating rubber compatibility

Abstract

The present invention relates to the technical field of tire manufacturing, and in particular, to an evaluation method, device, and computer program product for evaluating rubber compatibility. The present invention uses a mathematical method through the viscoelastic curve to calculate the absolute value of the difference between the differences of different peaks and valleys (the peak or valley corresponds to Tanδ) in the curve to characterize the compatibility between rubbers. The lower this value, the better the compatibility between rubbers, and the better the compatibility, the better the wear resistance performance.

Description

Technical Field

[0001] The present invention relates to the technical field of tire manufacturing, and particularly to an evaluation method, device and computer program product for evaluating rubber compatibility. Background Art

[0002] With the continuous development of transportation, automotive, and artificial intelligence technologies, as one of the important components of automobiles, tires are increasingly required by automobiles in terms of performance (such as dry and wet braking performance, wear resistance, low fuel consumption, durability, and high-speed performance).

[0003] Tire formulation engineers have adopted many countermeasures to improve the performance of tires. For example, from rubber, silica, silane coupling agents, and using functional resins to improve wetland performance and reduce rolling resistance. Especially with the increasing variety of rubbers, what is the compatibility between these rubber-rubber, rubber and resin, and rubber and oil, and what factors affect the compatibility: factors such as the microstructure, molecular weight, molecular weight distribution, branching, and functionalization of rubber affect the compatibility between rubbers and between rubber and resin, and the monomer type, aromaticity, hydrogenation, molecular weight, molecular weight distribution, and branching factors of resin affect the compatibility between rubbers and between rubber and resin.

[0004] How to characterize the compatibility between these rubbers and rubber, rubber and resin, and rubber and oil. Currently, solubility parameters are commonly used by researchers in rubber and resin to characterize their compatibility, but this method cannot quickly and macroscopically reflect the compatibility between rubbers, between rubber and resin, and between rubber and oil in different rubber composition systems. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an evaluation method for evaluating rubber compatibility. This method uses a mathematical method through the viscoelastic curve to calculate the absolute value of the difference between different peaks and valleys (the peak or valley corresponds to Tanδ) in the curve to characterize the compatibility between rubbers. The lower this value, the better the compatibility between rubbers, and the better the compatibility, the better the wear resistance.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An evaluation method for evaluating rubber compatibility, which uses a viscoelastic curve, that is, a T-Tanδ curve; and uses a mathematical method to calculate the difference between the Tanδ values of different peaks and valleys in the curve. The absolute value of the difference characterizes the compatibility between rubbers. The calculation formula for the absolute value of the difference is as follows:

[0008] d1 = |h2 - h1| (I)

[0009] d2 = |h3 - h2| (II)

[0010] d3 = |d2 - d1| (III)

[0011] In formulas (I), (II), and (III):

[0012] h1: is the loss factor Tanδ corresponding to temperature T1;

[0013] h2: is the loss factor Tanδ corresponding to temperature T2;

[0014] h3: is the loss factor Tanδ corresponding to temperature T3;

[0015] d1: is the absolute value of the difference between h2 and h1;

[0016] d2: is the absolute value of the difference between h3 and h2;

[0017] d3: is the absolute value of the difference between d2 and d1;

[0018] d3 characterizes the compatibility between rubbers. The lower the value of d3, the better the compatibility.

[0019] Preferably, the temperature scanning range is from -120 to 120 degrees Celsius, at a frequency of 1 to 20 Hz and a strain of 0.1 to 10%, for temperature scanning.

[0020] More preferably, the temperature scanning range is from -100 to 100 degrees Celsius, at a frequency of 5 to 20 Hz and a strain of 0.1 to 7%.

[0021] More preferably, the temperature scanning range is from -80 to 80 degrees Celsius, at a frequency of 9 to 20 Hz and a strain of 0.25 to 2%.

[0022] Preferably, this method can also be used for evaluating the compatibility between rubber and resin or the compatibility between rubber and oil.

[0023] Furthermore, the present invention also discloses an evaluation device for evaluating the compatibility of rubbers. The device includes a dynamic thermomechanical analysis device and a computer device. The computer device is connected to the dynamic thermomechanical analysis device. The computer device collects the viscoelastic curve obtained by the dynamic thermomechanical analysis device, and uses a mathematical method to calculate the difference in Tanδ between different peaks and valleys in the curve. The absolute value of the difference characterizes the compatibility between rubbers. The calculation formula for the absolute value of the difference is as follows:

[0024] d1 = |h2 - h1| (I)

[0025] d2 = |h3 - h2| (II)

[0026] d3 = |d2 - d1| (III)

[0027] In formulas (I), (II), and (III):

[0028] h1: is the loss factor Tanδ corresponding to temperature T1;

[0029] h2: is the loss factor Tanδ corresponding to temperature T2;

[0030] h3: is the loss factor Tanδ corresponding to temperature T3;

[0031] d1: is the absolute value of the difference between h2 and h1;

[0032] d2: is the absolute value of the difference between h3 and h2;

[0033] d3: is the absolute value of the difference between d2 and d1;

[0034] d3 characterizes the compatibility between rubbers. The lower the value of d3, the better the compatibility.

[0035] Furthermore, the present invention also discloses a computer device, including a memory, a processor, and a computer program stored on the memory. The processor executes the computer program to implement the method.

[0036] Furthermore, the present invention also discloses a computer-readable storage medium, on which a computer program or instruction is stored. When the computer program or instruction is executed by a processor, the method is implemented.

[0037] Furthermore, the present invention also discloses a computer program product, including a computer program or instruction. When the computer program or instruction is executed by a processor, the method is implemented.

[0038] Due to the adoption of the above technical solution in the present invention, the method uses a viscoelastic curve and a mathematical method to calculate the absolute value of the difference between the differences of different peaks and valleys (the peaks or valleys correspond to Tanδ) in the curve to characterize the compatibility between rubbers. The lower this value, the better the compatibility between rubbers, and the better the compatibility, the better the abrasion performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a viscoelastic curve diagram. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Next, the present invention will be described in combination with comparative examples and examples. In the examples, different rubbers are used in combination to obtain different rubber compositions of the examples. The viscoelastic curves are respectively tested, the compatibility between rubbers is obtained through mathematical calculations, and the compatibility between rubbers is verified through abrasion performance tests. The better the compatibility, the better the abrasion performance.

[0041] Examples are shown in Table 1 as follows:

[0042] The remarks in Table 1 are shown as follows:

[0043] 1 Natural rubber STR20, product from Thailand

[0044] 2 Styrene-butadiene rubber A, with styrene mass accounting for 15% of the total polymer weight and vinyl accounting for 30% of the total butadiene weight

[0045] 3 Styrene-butadiene rubber B, with styrene mass accounting for 35% of the total polymer weight, vinyl accounting for 40% of the total butadiene weight, and oil content of 27.3%

[0046] 4 Styrene-butadiene rubber C, with styrene mass accounting for 42% of the total polymer weight, vinyl accounting for 30% of the total butadiene weight, and oil content of 20%

[0047] 5 Fumed silica, 200MP, BET = 205m 2 / g, product of Solvay Chemicals

[0048] 6 Carbon black N234, product of Cabot

[0049] 7 Silane coupling agent, Si747, product of Jiangsu Qixiang Chemical Co., Ltd.

[0050] 8 Rubber processing oil, V700, product of Ningbo Hansheng Chemical Co., Ltd.

[0051] 9 Zinc oxide, product of Shijiazhuang Zhiyi Zinc Industry Co., Ltd.

[0052] 10 Stearic acid, Hangzhou Oil Chemical Co., Ltd.

[0053] 11 Antioxidant 6PPD, Shandong Shengao Chemical Technology Co., Ltd.

[0054] 12 Antioxidant TMQ, product of ChemChina-Kemian Co., Ltd.

[0055] 13 Dispersant SPA, product of Weihai Longyinda Nanomaterials Co., Ltd.

[0056] 14 Microcrystalline wax 11213, product of Braymer Specialty Chemicals (Suzhou) Co., Ltd.

[0057] 15 Accelerator CZ, product of Shandong Shangshun Chemical Co., Ltd.

[0058] 16 Sulfur S200-10S, product of Wuxi Huasheng Rubber New Materials Technology Co., Ltd.

[0059] 17 WY988, product of Jiangsu Qixiang Chemical Co., Ltd.

[0060] The mixing method adopts the conventional two-step mixing method for tire rubber.

[0061]

[0062] Method for evaluating performance

[0063] Viscoelastic property test

[0064] The measured data are Tanδ at 0°C and Tanδ at 60°C;

[0065] The test conditions are a frequency of 20 Hz and a dynamic strain of 0.25%;

[0066] The test equipment is a VR-7120 type dynamic thermomechanical analyzer manufactured by UESHIMA Company, Japan

[0067] d3 index

[0068] The d3 index characterizes the compatibility between rubbers. The lower the value, the better the compatibility. The d3 index is shown in Formula (IV).

[0069]

[0070] Wear resistance

[0071] The wear resistance is characterized by the wear amount. The lower the wear amount, the better the wear resistance. The wear amount is tested according to GB / T1689. The wear resistance index is shown in Formula (V). The lower the value of the wear resistance index, the better the wear resistance:

[0072]

[0073] The above is the description of the embodiments of the present invention. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel points disclosed herein.

Claims

1. An evaluation method for evaluating the compatibility of rubbers, characterized in that, this method uses the viscoelastic curve, i.e., the T-Tanδ curve; and by using a mathematical method, calculates the difference in Tanδ between different peaks and valleys in the curve. The absolute value of the difference characterizes the compatibility between rubbers. The calculation formula for the absolute value of the difference is as follows: d1 = |h2 - h1| (I) d2 = |h3 - h2| (II) d3 = |d2 - d1| (III) In formulas (I), (II), and (III): h1: is the loss factor Tanδ corresponding to temperature T1; h2: is the loss factor Tanδ corresponding to temperature T2; h3: is the loss factor Tanδ corresponding to temperature T3; d1: is the absolute value of the difference between h2 and h1; d2: is the absolute value of the difference between h3 and h2; d3: is the absolute value of the difference between d2 and d1; d3 characterizes the compatibility between rubbers, and the lower the value of d3, the better the compatibility.

2. The evaluation method for evaluating the compatibility of rubbers according to claim 1, characterized in that, the temperature scanning range is -120 to 120 degrees Celsius, and temperature scanning is carried out under the conditions of a frequency of 1 to 20 Hz and a strain of 0.1 to 10%.

3. The evaluation method for evaluating the compatibility of rubbers according to claim 2, characterized in that, the temperature scanning range is -100 to 100 degrees Celsius, the frequency is 5 to 20 Hz, and the strain is 0.1 to 7%.

4. The evaluation method for evaluating the compatibility of rubbers according to claim 3, characterized in that, the temperature scanning range is -80 to 80 degrees Celsius, the frequency is 9 to 20 Hz, and the strain is 0.25 to 2%.

5. The evaluation method for evaluating the compatibility of rubbers according to any one of claims 1 - 4, characterized in that, this method can also be used for evaluating the compatibility between rubber and resin or the compatibility between rubber and oil.

6. An evaluation device for evaluating the compatibility of rubbers, characterized in that, this device includes a dynamic thermomechanical analysis device and a computer device. The computer device is connected to the dynamic thermomechanical analysis device. The computer device collects the viscoelastic curve obtained by the dynamic thermomechanical analysis device and uses a mathematical method to calculate the difference in Tanδ between different peaks and valleys in the curve. The absolute value of the difference characterizes the compatibility between rubbers. The calculation formula for the absolute value of the difference is as follows: d1 = |h2 - h1| (I) d2 = |h3 - h2| (II) d3 = |d2 - d1| (III) In formulas (I), (II), and (III): h1: is the loss factor Tanδ corresponding to temperature T1; h2: is the loss factor Tanδ corresponding to temperature T2; h3: is the loss factor Tanδ corresponding to temperature T3; d1: is the absolute value of the difference between h2 and h1; d2: is the absolute value of the difference between h3 and h2; d3: is the absolute value of the difference between d2 and d1; d3 characterizes the compatibility between rubbers, and the lower the value of d3, the better the compatibility.

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

8. A computer-readable storage medium having stored thereon a computer program or instructions, wherein, when the computer program or instructions are executed by a processor, the method according to any one of claims 1-5 is implemented.

9. A computer program product comprising a computer program or instructions, wherein, when the computer program or instructions are executed by a processor, the method according to any one of claims 1-5 is implemented.

Images