Method for establishing climatic environment test benchmark

Abstract

The invention discloses a method for establishing a climatic environment aging test benchmark. Comprising the following steps: (1) selection of a typical climate environment test station, (2) typical climate environment test, (3) analysis of test results, (4) determination of a reference climate environment test station, (5) establishment of correlation between the reference climate test environment and the severity of other climate test environments in China, and (6) establishment of correlation between the reference climate test environment and the severity of other climate test environments in China. According to the method, the severity correlation between a national standard climate environment test station and an international standard climate environment test station is established, the method can be used for environmental adaptability test and verification of products or materials, a standard is provided for establishing a corresponding simulation acceleration test technology, the efficiency and the economical efficiency of climate environment tests are improved, and the test cost is reduced. And the method has a far-reaching influence on promotion of construction of an environmental technical standard system in China and improvement of international competitiveness.

Description

Technical Field

[0001] The present invention relates to the technical field of climate environment testing of products or materials, and in particular to a method for establishing a climate environment testing benchmark. Background Art

[0002] In various industrial applications, products and materials are inevitably affected by climatic and environmental factors such as solar radiation, temperature fluctuations, and humidity changes. These factors can cause changes in the chemical structure or physical state of the material, thereby affecting its performance. For example, solar radiation may cause photodegradation of the material surface, extreme temperature changes may cause thermal expansion or contraction, and humidity fluctuations may cause moisture absorption or drying, which in turn affects the mechanical strength and electrical properties of the material. Changes caused by these climatic and environmental factors may lead to a decline in product performance or even functional failure. Research data shows that the failure of a considerable number of electronic products is directly related to these climatic and environmental factors.

[0003] Therefore, in order to ensure that products and materials can maintain the expected performance and reliability in actual use, it is particularly important to evaluate their adaptability, weather resistance and expected life under various climatic and environmental conditions. As an important technical means, climatic environmental testing can simulate various climatic conditions that products may encounter during service, so as to predict and evaluate the behavior and performance changes of products in actual use environments. Through these tests, potential problems can be identified in advance, and corresponding design or material improvement measures can be taken to reduce the failure rate of products caused by environmental factors during use. Therefore, climatic environmental testing is of great significance to improving the reliability of products and extending their service life.

[0004] In order to establish effective environmental testing conditions and capabilities and improve the environmental adaptability of equipment products, developed countries such as the United States have established standardized typical climate environment test stations in their own countries and even around the world. Based on the data accumulated over a long period of time at these typical climate environment test stations, the United States has taken the lead in formulating a number of ISO and IEC international standards, as well as standards in related fields of ASTM, and has the right to speak on international standards. my country has also established corresponding environmental test stations in seven climate environment zones: humid heat, sub-humid heat, dry heat, cold, warm temperature, cold temperature I, and cold temperature II, and has been conducting long-term environmental testing of materials and products, making important contributions to supporting the construction of my country's environmental conditions and environmental technology standards system.

[0005] Chinese products need to withstand the test of the complex and diverse global climate environment and maintain the specified performance and functions. However, the global climate environment is complex and diverse. The Köppen climate classification system divides the global climate into 6 types, including tropical, arid, temperate, continental, polar and plateau climates; IEC 60721-2-1:2013 divides the global climate into 5 types: tropical, arid, temperate, frigid and polar. The global temperature ranges from -68℃ to 58℃, and the annual total solar radiation ranges from 2500MJ / m 2 Span up to 10000MJ / m 2 , environmental conditions vary greatly, and it is unrealistic to test every product in all climate environments around the world. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned technical problems and provide a method for establishing a climate environment test benchmark, which can be used for environmental adaptability testing and verification of products or materials, and provide a benchmark for establishing corresponding simulation accelerated test technology.

[0007] In order to solve the above problems, the present invention is implemented according to the following technical solutions:

[0008] In a first aspect, the present invention provides a method for establishing a climate environment test benchmark, the method comprising:

[0009] (1) Selection of typical climate environment test stations: Select typical climate environment test stations according to the national standard GB / T 4797.1-2018 Classification of Environmental Conditions - Natural Environmental Conditions - Temperature and Humidity;

[0010] (2) Typical climate environment test: Based on the typical climate environment test station selected in step (1), carry out climate environment test on the material sample, the test time is at least one full year, and the test time increases in units of one year until the material sample degrades and fails;

[0011] During the test, material samples are taken out at certain time intervals, and the performance of the material samples is tested and the data is recorded; during the test, the material samples are placed at an angle of 45° to the horizontal plane due south of the equator;

[0012] (3) Analyze the test results: With the performance data of the material sample as the ordinate and the test time of the material sample as the abscissa, draw a relationship diagram of the performance of the material sample versus the test time in a rectangular coordinate system; compare the performance changes of the material sample after the climatic environment test at different typical climatic environment test stations to obtain the severity of the weather resistance of the material sample under different typical climatic environments;

[0013] (4) Determination of the benchmark climate and environment test stations: Based on the test results obtained in step (3), select the first three corresponding typical climate and environment test stations in descending order of severity as the benchmark climate and environment test stations;

[0014] (5) Establish the relationship between the severity of the benchmark climate test environment and other climate test environments in my country: through the environmental severity model formula Calculate the severity of other climate test environments relative to the baseline climate test environment. Rs is the environmental severity index, I x is the total annual solar ultraviolet radiation in the area with the same climate environment as the test, I0 is the total annual solar ultraviolet radiation in the benchmark climate environment test station, a is the solar radiation factor effective for the material, RH x is the annual average relative humidity in the area with the same climate environment as the test, RH0 is the annual average relative humidity of the benchmark climate environment test station, b is the relative humidity factor effective for the material, E a is the activation energy of the material weathering reaction, R is the gas molar constant, T x is the annual average temperature of the region with the same climate environment as the tested one, and T0 is the annual average temperature of the benchmark climate environment test station;

[0015] (6) Establish the relationship between the severity of my country’s benchmark climate test environment and the severity of the international benchmark climate test environment.

[0016] Preferably, in step (1), the typical climate environment test stations selected according to the national standard "GB / T 4797.1-2018 Environmental Conditions Classification Natural Environmental Conditions Temperature and Humidity" include humid hot climate environment test station, sub-humid hot climate environment test station, dry hot climate environment test station, cold climate environment test station, warm temperature climate environment test station, cold temperature I climate environment test station and cold temperature II climate environment test station.

[0017] Preferably, in step (2), the time interval is 1 month, 3 months or 6 months.

[0018] Preferably, the specific process of step (6) is: using the environmental severity model formula Calculate the severity of the international benchmark climate environment on the weather resistance of the material sample, where Rs is the severity index of the international benchmark climate environment, I x is the total annual solar ultraviolet radiation in the area with the same international benchmark climate environment as the tested one, I0 is the total annual solar ultraviolet radiation in the benchmark climate environment test station in my country, a is the solar radiation factor effective for the material, RH x is the annual average relative humidity of the area with the same international benchmark climate environment as the tested one, RH0 is the annual average relative humidity of the benchmark climate environment test station in my country, b is the relative humidity factor effective for the material, Ea is the activation energy of the material weathering reaction, R is the gas molar constant, T x It is the annual average temperature of the area with the same international benchmark climate environment being tested, and T0 is the annual average temperature of my country's benchmark climate environment test station.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a method for establishing a climate environment test benchmark. First, it accumulates valuable data by conducting long-term climate environment tests in different typical climate environments in my country. These data are not only helpful for evaluating the weather resistance and service life of products or materials in actual service, but also can provide a scientific basis for establishing a domestic benchmark that matches the international climate environment test benchmark station. The implementation of this method enables the adaptability of products or materials in other different environments to be indirectly evaluated through tests conducted at domestic benchmark environmental test stations under limited resources, thereby saving test time and cost and improving test efficiency. Secondly, the present invention studies the severity difference between the benchmark climate test environment and other climate environments in my country and the international benchmark climate test environment by comparing tests or model calculations. This step not only enhances the accuracy and reliability of the test results, but also helps to build an independent environmental technology standard system that meets the characteristics of my country's climate environment and the needs of industrial development. The establishment of this standard is of great significance for enhancing my country's voice in the formulation of international standards and solving the problem that international standards are not applicable or not fully covered in subdivided environmental types. In addition, the present invention also achieves international recognition of domestic test results by quantitatively correlating the severity of my country's climate and environmental test base station with the severity of international base stations, which plays an important role in promoting Chinese products to the international market, withstanding the test of the complex and diverse global climate and environment, and maintaining the specified performance and functions. In summary, the present invention not only improves the efficiency and economy of climate and environmental testing, but also has a far-reaching impact on promoting the construction of my country's environmental technology standard system and enhancing international competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0022] Figure 1 It is a technical principle diagram of a method for establishing a climate environment test benchmark of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this specification should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different technical features.

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] like Figure 1 As shown, a method for establishing a climate environment test benchmark according to the present invention comprises the following steps:

[0027] (1) Selection of typical climate environment test stations: Select typical climate environment test stations according to the national standard GB / T 4797.1-2018 Classification of Environmental Conditions - Natural Environmental Conditions - Temperature and Humidity.

[0028] Preferably, the typical climate environment test stations selected according to the national standard "GB / T 4797.1-2018 Environmental Conditions Classification Natural Environmental Conditions Temperature and Humidity" include humid hot climate environment test station, sub-humid hot climate environment test station, dry hot climate environment test station, cold climate environment test station, warm temperature climate environment test station, cold temperature I climate environment test station and cold temperature II climate environment test station.

[0029] (2) Typical climate environment test: Based on the typical climate environment test station selected in step (1), a climate environment test is conducted on the material sample. The test time is at least one full year, and the test time is increased in units of one year until the material sample degrades and fails. During the test, the material sample is taken out at regular time intervals, and the performance of the material sample is tested and the data is recorded. During the test, the material sample is placed at an angle of 45° to the horizontal plane due south of the equator.

[0030] Preferably, when material samples are taken at certain time intervals during the test, the "time interval" is 1 month, 3 months or 6 months.

[0031] It should be noted that climate and environmental testing is to expose products or materials to specific climate environments to determine the impact of these environments on products or materials. This process includes natural environmental testing and laboratory environmental testing, taking into account various climate and environmental factors (such as temperature, humidity, light, solar radiation, etc.) that products or materials may encounter and their adaptability to these factors. Through environmental testing, the performance of products or materials under various environmental conditions can be assessed, and problems in product design and manufacturing processes can be exposed, thereby improving product reliability.

[0032] It should be noted that material degradation refers to the process in which the performance of a material gradually decreases and its structure is gradually damaged due to the influence of physical, chemical or biological factors in the natural environment or during use. This degradation may manifest in various forms such as aging, corrosion, and wear. In the present invention, the degradation failure of a material sample refers to the degradation of a material sample to a certain extent, so that it loses its original function and use value and can no longer meet the design requirements and purpose of use. Failure usually means that the performance of the material has dropped to a critical point, which may be defined by specific manifestations such as cracks, fractures, excessive deformation, and loss of function.

[0033] It is understandable that in the present invention, carrying out typical climate environment tests on material samples provides detailed data and analysis results on the performance changes of materials under different climate environments. These data are the key basis for selecting the type of benchmark climate environment, studying the difference in severity between the benchmark climate test environment and other climate environments in my country, and studying the difference in severity between my country's benchmark climate test environment and international benchmark climate test environments in subsequent steps. By conducting an in-depth analysis of the performance of material samples in typical climate environment tests, it is possible to determine which climate conditions have the most significant impact on the performance of the material, and then select the most representative and severe climate environment as the benchmark. At the same time, these data can also help evaluate and compare the degree of influence of different climate environments at home and abroad on material performance, provide a scientific basis for establishing a domestic benchmark that matches the international climate environment test benchmark station, and ensure the climate adaptability and reliability of Chinese products around the world.

[0034] Preferably, in step (2), the material sample is selected according to the material actually used in the manufacture of the product, or alternatively, a material similar in type, structure, and composition to the material actually used is selected as the material sample. Specifically, general-purpose plastics such as polyethylene and polypropylene, or engineering plastics such as polycarbonate materials can be selected as material samples. Materials with simple structures, which are sensitive to aging in the climate environment, and which have obvious differences in degradation in different environments, such as polystyrene, can also be selected as samples. In actual application scenarios, material samples can be selected as needed for climate and environmental testing, and the present invention is not further limited herein.

[0035] Preferably, the material samples are prepared according to relevant performance test standards, and the performance tests include appearance performance tests and mechanical performance tests. Specifically, the appearance performance tests include color difference, yellowness index, gloss, etc., and the mechanical performance tests include tensile strength, elongation at break, impact strength, etc.

[0036] (3) Analyze the test results: Use the performance data of the material sample as the ordinate and the test time of the material sample as the abscissa to draw a relationship graph between the performance of the material sample and the test time in a rectangular coordinate system; compare the performance changes of the material sample after the climate environment test at different typical climate environment test stations to obtain the severity of the weather resistance of the material sample in different typical climate environments.

[0037] (4) Determination of the benchmark climate environment test station: Based on the test results obtained in step (3), select the first three corresponding typical climate environment test stations in descending order of severity as the benchmark climate environment test stations.

[0038] (5) Establish the relationship between the severity of the benchmark climate test environment and other climate test environments in my country: through the environmental severity model formula Calculate the severity of other climate test environments relative to the baseline climate test environment. Rs is the environmental severity index, I x is the total annual solar ultraviolet radiation in the area with the same climate environment as the test, I0 is the total annual solar ultraviolet radiation in the benchmark climate environment test station, a is the solar radiation factor effective for the material, RH x is the annual average relative humidity in the area with the same climate environment as the test, RH0 is the annual average relative humidity of the benchmark climate environment test station, b is the relative humidity factor effective for the material, E a is the activation energy of the material weathering reaction, R is the gas molar constant, T x It is the annual average temperature of the area with the same climate environment as the one being tested, and T0 is the annual average temperature of the benchmark climate environment test station.

[0039] It should be noted that in step (5), the "benchmark climate test environment" refers to the typical climate environment corresponding to the three benchmark climate environment test stations determined in step (4); the "other climate environments" mentioned in step (5) refer to other climate environments in my country except the typical climate environments corresponding to the benchmark climate environment test stations.

[0040] Preferably, in step (5), the severity of other climate environments relative to the benchmark climate test environment can also be calculated in the following manner: carry out climate environment tests on material samples at the benchmark climate environment test station and other climate environment test stations at the same time, the test time is at least one full year, and the test time is increased in units of one year according to the weather resistance of the material sample until the material sample degrades and fails; during the test, samples are taken at a certain time interval to test the performance of the material sample and record the data, and the sampling time interval is 1 month, 3 months or 6 months. Finally, the inverse ratio of the failure time of the material sample at the benchmark climate environment test station and that of a certain climate environment test station is used as the relative severity coefficient of a certain climate environment test station relative to the benchmark climate environment test station.

[0041] (6) Establish the relationship between the severity of my country’s benchmark climate and environmental testing stations and that of international benchmark climate and environmental testing stations.

[0042] Preferably, the specific process of step (6) is: using the environmental severity model formula Calculate the severity of the international benchmark climate environment on the weather resistance of the material sample, where Rs is the severity index of the international benchmark climate environment, I x is the total annual solar ultraviolet radiation in the area with the same international benchmark climate environment as the tested one, I0 is the total annual solar ultraviolet radiation in the benchmark climate environment test station in my country, a is the solar radiation factor effective for the material, RH x is the annual average relative humidity of the area with the same international benchmark climate environment as the tested one, RH0 is the annual average relative humidity of the benchmark climate environment test station in my country, b is the relative humidity factor effective for the material, E a is the activation energy of the material weathering reaction, R is the gas molar constant, T x It is the annual average temperature of the area with the same international benchmark climate environment being tested, and T0 is the annual average temperature of my country's benchmark climate environment test station.

[0043] Preferably, in step (6), the association between the severity of my country's benchmark climate and environment test station and the severity of the international benchmark climate and environment test station can also be established in the following manner: specifically, an international benchmark climate and environment test station with the same climate and environment as that of my country's benchmark climate and environment test station is selected for testing, and climate and environment tests are carried out at the my country's benchmark climate and environment test station and the international benchmark climate and environment test station respectively at the same time, and the test time is at least one full year, and the test time is increased in units of one year according to the weather resistance of the material until the material sample degrades and fails; samples are taken out at certain time intervals during the test, and the performance of the samples is tested and the data is recorded; wherein the time interval is 1 month, 3 months or 6 months; based on the performance data and solar radiation data of the material samples measured during the climate and environment test, the performance data is used as the vertical coordinate and the solar radiation data is used as the horizontal coordinate, and the performance-solar radiation curves measured at the my country's benchmark station and the international benchmark station are plotted in the same rectangular coordinate system to establish the association between the severity of the my country's benchmark station and the international benchmark station. The master curve translation method is adopted, that is, the performance-solar radiation curve measured at the international benchmark station is kept unchanged, the ordinate value of the performance-solar radiation curve measured at the Chinese benchmark station is kept unchanged, and the abscissa is multiplied by the translation coefficient f (where f retains two significant figures after the decimal point), so that the performance-solar radiation curves measured by the two benchmark stations are basically overlapped, where, assuming that the severity of the international benchmark climate test environment is 1.00, f is the severity of the Chinese benchmark climate test environment.

[0044] The working principle of the method for establishing a climate environment test benchmark described in the present invention is: first, it accumulates valuable data by carrying out long-term climate environment tests in different typical climate environments in my country. These data are not only helpful for evaluating the weather resistance and service life of products or materials in actual service, but also can provide a scientific basis for establishing a domestic benchmark that matches the international climate environment test benchmark station. The implementation of this method enables the adaptability of products or materials in other different environments to be indirectly evaluated through tests conducted at domestic benchmark environmental test stations under limited resources, thereby saving test time and cost and improving test efficiency. Secondly, the present invention studies the severity difference between the benchmark climate test environment and other climate environments in my country and the international benchmark climate test environment by comparing tests or model calculations. This step not only enhances the accuracy and reliability of the test results, but also helps to build an independent environmental technology standard system that meets the characteristics of my country's climate environment and the needs of industrial development. The establishment of this standard is of great significance for enhancing my country's voice in the formulation of international standards and solving the problem that international standards are not applicable or not fully covered in subdivided environmental types. In addition, the present invention also achieves international recognition of domestic test results by quantitatively correlating the severity of my country's climate and environmental test base station with the severity of international base stations, which plays an important role in promoting Chinese products to the international market, withstanding the test of the complex and diverse global climate and environment, and maintaining the specified performance and functions. In summary, the present invention not only improves the efficiency and economy of climate and environmental testing, but also has a far-reaching impact on promoting the construction of my country's environmental technology standard system and enhancing international competitiveness.

[0045] In a specific embodiment, by comparing the climatic environment aging test results of polystyrene reference materials and polycarbonate engineering plastics in representative test stations of seven typical climatic environments in my country, namely, humid heat, sub-humid heat, dry heat, cold, warm temperature, cold temperature I, and cold temperature II, the aging severity of different climatic environments on the materials is studied, and a humid heat environment with relatively large aging severity is selected as a climatic environment test benchmark environment. The specific implementation steps are as follows:

[0046] (1) Selection of typical climate environment test stations: Seven typical climate environment test stations were selected, including humid heat (Qionghai), sub-humid heat (Guangzhou), dry heat (Turpan), cold (Hailar), warm temperature (Qingdao), cold temperature I (Dunhuang), and cold temperature II (Lhasa).

[0047] (2) Typical climate environment test: Based on the typical climate environment test station selected in step (1), climate environment aging tests were carried out on polystyrene (PS) reference materials and polycarbonate (PC) engineering plastics. The samples were all prepared by injection molding and were 60mm*80mm*3mm in length, width and thickness. The test samples were placed on a special test stand, facing south and at a 45° angle to the horizontal plane.

[0048] (3) Analysis of test results: PS was tested for 1 year, and the yellow index was tested every 1 month. After the test period was over, the yellow index was used as the ordinate and the climate aging test time was used as the abscissa to plot the yellow index of PS versus aging time. The curve was used to compare the change in the yellow index of PS after aging for 1 year in different climate environments. It was found that the three climate environments with the largest changes were humid heat (Qionghai), sub-humid heat (Guangzhou) and cold temperature II (Lhasa). PC was tested for 3 years, and the color difference was tested every 3 months. After the test period was over, the color difference was used as the ordinate and the climate aging test time was used as the abscissa to plot the color difference of PC versus aging time. The curve was used to compare the change in the color difference of PC after aging for 3 years in different climate environments. It was found that the three climate environments with the largest changes were humid heat (Qionghai), dry heat (Turpan) and cold temperature II (Lhasa).

[0049] (4) Determination of the benchmark climate environment test station: Based on the test results of step (3), the hot and humid (Qionghai) environment has the greatest impact on the yellowness index of polystyrene and the color difference aging of polycarbonate. The Qionghai (hot and humid) climate environment is selected as a climate environment test benchmark environment.

[0050] (5) Establish the relationship between the severity of the benchmark climate test environment and other climate test environments in my country: Based on the environmental severity model formula The severity of six typical climate environments, including sub-humid heat (Guangzhou), dry heat (Turpan), cold (Hailar), warm temperature (Qingdao), cold temperature I (Dunhuang), and cold temperature II (Lhasa), relative to the humid heat (Qionghai) benchmark test environment was calculated. The severity of the humid heat (Qionghai) environment was taken as 1.00 to calculate the severity of other environments. The environmental parameters such as solar radiation, temperature, and humidity used in the calculation are shown in Table 1 below. The other parameters in the environmental severity model formula use the following values: a = 0.64; b = 0.35; Ea = 21 kJ / mol. The relative severity calculation results are shown in Table 2 below. Due to the different aging mechanisms of different materials and the different performances of the same material being affected by the environment, the same environment may not necessarily affect the different performances of different materials in the same way. The evaluation of the aging severity of different environments on different materials should be based on specific materials and performances. In particular, Table 2 below shows the relative severity of aging of polystyrene (PS) in different climate environments (taking color difference changes as an example).

[0051] Table 1 Environmental condition parameters of test sites in different climate environments

[0052]

[0053] Table 2 The severity of each climate environment relative to the humid and hot (Qionghai) benchmark test environment (taking PS color difference change as an example)

[0054] Climate type Damp heat (Qionghai) Subhumid heat (Guangzhou) Dry heat (Turpan) Cold (Hyrule) Relative severity 1.00 0.84 0.63 0.44 Climate type Warm Temperature(Qingdao) Cold and Warm I (Dunhuang) Cold and Warm II (Lhasa) Relative severity 0.61 0.57 0.63

[0055] (6) Establish the correlation between the severity of my country's benchmark climate and environmental test stations and the international benchmark climate and environmental test stations: Study the difference in severity between my country's humid and hot (Qionghai) benchmark climate and the international humid and hot (Miami) benchmark climate. Use experimental methods to compare the severity. Carry out climate and environmental aging tests on polystyrene (PS) reference materials at my country's humid and hot (Qionghai) environmental test station and the United States humid and hot (Miami) benchmark climate and environmental station, respectively. The test period is one year, and samples are taken every month to test the color difference of the materials. Based on the color difference and solar radiation data of PS measured during the test, the color difference value is used as the vertical coordinate and the solar radiation is used as the horizontal coordinate. The color difference-solar radiation curves measured at my country's humid and hot (Qionghai) benchmark station and the international humid and hot (Miami) benchmark station are plotted in the same coordinate system. The main curve translation method is adopted, that is, the color difference-solar radiation curve measured at the International Humid Heat (Miami) Base Station is kept unchanged, the ordinate value of the color difference-solar radiation curve at the Humid Heat (Qionghai) Base Station is kept unchanged, and the abscissa is multiplied by the translation coefficient of 1.08, so that the color difference-solar radiation curves measured at the two base stations basically coincide, and the relative severity of Humid Heat (Qionghai) relative to the Humid Heat (Miami) Base Station is calculated. The research results show that the severity of the International Humid Heat (Miami) Base Climate and Environmental Station is 1.00, and the severity coefficient of the Humid Heat (Qionghai) Base Station in my country is 1.08. The larger the severity coefficient, the higher the severity.

[0056] In another specific embodiment, by comparing the climatic environment aging test results of general plastic polypropylene (homopolymer) materials in representative test stations of 7 typical climatic environments in my country, namely, humid heat, sub-humid heat, dry heat, cold, warm temperature, cold temperature I, and cold temperature II, the aging severity of different climatic environments on the material is studied, and a dry heat environment with relatively large aging severity is selected as a climatic environment test benchmark environment. The specific implementation steps are as follows:

[0057] (1) Selection of typical climate environment test stations: Seven typical climate environment test stations were selected, including humid heat (Qionghai), sub-humid heat (Guangzhou), dry heat (Turpan), cold (Hailar), warm temperature (Qingdao), cold temperature I (Dunhuang), and cold temperature II (Lhasa).

[0058] (2) Typical climate environment test: Based on the typical climate environment test station selected in step (1), climate environment aging tests of general plastic polypropylene (PP, homopolymer) were carried out respectively. The samples were prepared by injection molding and the length, width and thickness were 60mm*80mm*3mm. The test samples were placed on a special test frame, facing south and at a 45° angle to the horizontal plane.

[0059] (3) Analysis of test results: The PS test lasted for 3 years, with the gloss tested every 3 months. After the test period was over, a gloss curve of PP versus aging time was plotted, with gloss as the ordinate and climate aging test time as the abscissa. The gloss change of PP after aging for 3 years in different climate environments was compared through the curve. It was found that the three climate environments with the largest changes were dry heat (Turpan), humid heat (Qionghai), and sub-humid heat (Guangzhou).

[0060] (4) Determination of the benchmark climate environment test station: According to the test results of step (3), the dry heat (Turpan) environment has the greatest impact on the color difference of polypropylene. The dry heat (Turpan) climate environment is selected as a climate environment test benchmark environment.

[0061] (5) Establish the relationship between the severity of the benchmark climate test environment and other climate test environments in my country: Based on the environmental severity model formula Calculate the severity of typical climate environments such as humid heat (Qionghai), sub-humid heat (Guangzhou), cold (Hailar), warm temperature (Qingdao), cold temperature I (Dunhuang), and cold temperature II (Lhasa) relative to the dry heat (Turpan) benchmark test environment. Take the severity of dry heat (Turpan) as 1.00 to calculate the severity of other environments. The environmental parameters such as solar radiation, temperature, and humidity used in the calculation are shown in Table 1 above. The other parameters in the environmental severity model formula use the following values: a = 0.64; b = 0.35; Ea = 21 kJ / mol. The relative severity calculation results are shown in Table 3 below. Due to the different aging mechanisms of different materials and the different performances of the same material being affected by the environment, the same environment may not necessarily affect the different performances of different materials in the same way. The evaluation of the aging severity of different environments on different materials should be based on specific materials and performances. Table 3 shows the relative severity of aging of polystyrene (PS) in different climate environments (taking color difference changes as an example).

[0062] Table 3 The severity of each climate environment relative to the dry heat (Turpan) benchmark test environment (taking PS color difference change as an example)

[0063] Climate type Dry heat (Turpan) Subhumid heat (Guangzhou) Damp heat (Qionghai) Cold (Hyrule) Relative severity 1.00 1.34 1.60 0.70 Climate type Warm Temperature(Qingdao) Cold and Warm I (Dunhuang) Cold and Warm II (Lhasa) Relative severity 0.97 0.91 1.00

[0064] (6) Establish the relationship between the severity of my country's benchmark climate and environment test station and the international benchmark climate and environment test station: Study the difference in severity between my country's dry heat (Turpan) benchmark climate environment and the international dry heat (Phoenix) benchmark climate environment. Use experimental methods to compare the severity. Carry out climate and environmental aging tests on polystyrene (PS) reference materials at my country's dry heat (Turpan) environmental test station and the United States dry heat (Phoenix) benchmark climate and environment station, respectively. The test period is one year, and the color difference of the materials is tested every month. Based on the color difference and solar radiation data of PS measured during the test, the color difference value is used as the vertical axis and the solar radiation is used as the horizontal axis. The color difference-solar radiation curves measured at my country's dry heat (Turpan) benchmark station and the international dry heat (Phoenix) benchmark station are plotted in the same coordinate system. The main curve translation method is adopted, that is, the color difference-solar radiation curve measured at the International Dry Heat (Phoenix) Base Station is kept unchanged, the ordinate value of the color difference-solar radiation curve at the Dry Heat (Turpan) Base Station is kept unchanged, and the abscissa is multiplied by the translation coefficient of 0.85, so that the color difference-solar radiation curves measured at the two base stations basically coincide, and the relative severity of the Dry Heat (Turpan) Base Station relative to the Dry Heat (Phoenix) Base Station is calculated. The research results show that the severity of the International Dry Heat (Phoenix) Base Station is 1.00, and the severity coefficient of the Dry Heat (Turpan) Base Station in my country is 0.85. The larger the severity coefficient, the higher the severity.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for establishing a climate environment test benchmark, characterized in that: The method comprises: (1) Selection of typical climate environment test stations: Select typical climate environment test stations according to the national standard GB / T 4797.1-2018 Classification of Environmental Conditions - Natural Environmental Conditions - Temperature and Humidity; (2) Typical climate environment test: Based on the typical climate environment test station selected in step (1), carry out climate environment test on the material sample, the test time is at least one full year, and the test time increases in units of one year until the material sample degrades and fails; During the test, material samples are taken out at certain time intervals, and the performance of the material samples is tested and the data is recorded; during the test, the material samples are placed at an angle of 45° to the horizontal plane due south of the equator; (3) Analyze the test results: With the performance data of the material sample as the ordinate and the test time of the material sample as the abscissa, draw a relationship diagram of the performance of the material sample versus the test time in a rectangular coordinate system; compare the performance changes of the material sample after the climatic environment test at different typical climatic environment test stations to obtain the severity of the weather resistance of the material sample under different typical climatic environments; (4) Determination of the benchmark climate and environment test stations: Based on the test results obtained in step (3), select the first three corresponding typical climate and environment test stations in descending order of severity as the benchmark climate and environment test stations; (5) Establish the relationship between the severity of the benchmark climate test environment and other climate test environments in my country: through the environmental severity model formula Calculate the severity of other climate test environments relative to the baseline climate test environment. Rs is the environmental severity index, I x is the total annual solar ultraviolet radiation in the area with the same climate environment as the test, I0 is the total annual solar ultraviolet radiation in the benchmark climate environment test station, a is the solar radiation factor effective for the material, RH x is the annual average relative humidity in the area with the same climate environment as the test, RH0 is the annual average relative humidity of the benchmark climate environment test station, b is the relative humidity factor effective for the material, E a is the activation energy of the material weathering reaction, R is the gas molar constant, T x is the annual average temperature of the region with the same climate environment as the tested one, and T0 is the annual average temperature of the benchmark climate environment test station; (6) Establish the relationship between the severity of my country’s benchmark climate test environment and the severity of the international benchmark climate test environment.

2. A method for establishing a climate environment test benchmark according to claim 1, characterized in that: In step (1), the typical climate environment test stations selected according to the national standard "GB / T 4797.1-2018 Environmental Conditions Classification Natural Environmental Conditions Temperature and Humidity" include humid hot climate environment test station, sub-humid hot climate environment test station, dry hot climate environment test station, cold climate environment test station, warm temperature climate environment test station, cold temperature I climate environment test station and cold temperature II climate environment test station.

3. A method for establishing a climate environment test benchmark according to claim 1, characterized in that: In step (2), the time interval is 1 month, 3 months or 6 months.

4. A method for establishing a climate environment test benchmark according to claim 1, characterized in that: The specific process of step (6) is as follows: Environmental severity model formula Calculate the severity of the international benchmark climate environment on the weather resistance of the material sample, where Rs is the severity index of the international benchmark climate environment, I x is the total annual solar ultraviolet radiation in the area with the same international benchmark climate environment as the tested one, I0 is the total annual solar ultraviolet radiation in the benchmark climate environment test station in my country, a is the solar radiation factor effective for the material, RH x is the annual average relative humidity of the area with the same international benchmark climate environment as the tested one, RH0 is the annual average relative humidity of the benchmark climate environment test station in my country, b is the relative humidity factor effective for the material, E a is the activation energy of the material weathering reaction, R is the gas molar constant, T x It is the annual average temperature of the area with the same international benchmark climate environment being tested, and T0 is the annual average temperature of my country's benchmark climate environment test station.

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