Polyphenylene sulfide composition and fluid pump

Abstract

The invention provides a polyphenylene sulfide composition, and relates to the technical field of high polymer materials, the polyphenylene sulfide composition comprises the following components in parts by weight: 40-55 parts of polyphenylene sulfide, not less than the glass fiber, not less than the alcoholysis-resistant agent, not less than the alcoholysis-resistant agent and not less than the alcoholysis-resistant agent, and a processing aid, and the processing aid comprises the following components in parts by weight: 40-55 parts of polyphenylene sulfide, not less than the alcoholysis-resistant agent, not less than the alcoholysis-resistant agent and not less than the alcoholysis-resistant agent. The component of the glass fiber is at least two times that of the polyphenyl ether component, the component of the alcoholysis-resistant agent is 1-4 parts, the polyphenylene sulfide composition can be used for preparing a fluid pump, the tensile strength of a medium runner in a flowing cavity in a specific medium environment is enhanced, the tensile strength retention rate is increased, and the fluid pump meets corresponding working requirements.

Description

Technical Field

[0001] The present application relates to the technical field of polymer materials, and in particular to a polyphenylene sulfide composition and a fluid pump. Background Art

[0002] As a special engineering material with excellent comprehensive performance, polyphenylene sulfide (PPS) has many excellent properties such as outstanding heat resistance, corrosion resistance, fatigue resistance, flame retardancy, etc., so it is widely used in electronics, electrical appliances, automobiles, precision machinery and other fields. However, polyphenylene sulfide (PPS) also has some problems. For example, it is very easy to flow and difficult to injection mold, has poor impact strength, brittle products, poor welding strength, and high cost. These unfavorable factors have hindered the application of PPS to a certain extent.

[0003] At present, most composite materials of polyphenylene sulfide are toughened with fiber materials and polyphenylene ether (PPO) is used to improve mechanical stability. However, in reality, these are only composite performance tests under conventional media and cannot achieve performance requirements in special media. For example, in alcohol solution media, the material will have some interference from partial alcoholysis. Summary of the invention

[0004] The purpose of the present application is to provide a polyphenylene sulfide composition, which is intended to enhance the stability of the mechanical properties of engineering composite materials under special environments and improve the tensile strength retention rate of the material.

[0005] The present application provides a polyphenylene sulfide composition, comprising polyphenylene sulfide, polyphenylene ether, glass fiber, an anti-alcoholysis agent and a processing aid. Calculated by weight, the component of the polyphenylene sulfide is 40 to 55 parts, the component of the polyphenylene sulfide is not less than the glass fiber, the component of the glass fiber is at least twice that of the polyphenylene ether, and the component of the anti-alcoholysis agent is 1 to 4 parts.

[0006] By adjusting the component relationship between polyphenylene sulfide and glass fiber and polyphenylene ether, it is ensured that the formed composite material can take into account both tensile strength and tensile strength retention rate, and by equalizing the anti-alcoholysis agent, the stability of the mechanical properties of the material in a specific medium environment is effectively improved.

[0007] The present application also provides a fluid pump, comprising the polyphenylene sulfide composition, wherein the fluid pump comprises a flow cavity, wherein a medium flow channel for accommodating an alcohol solution is provided in the flow cavity, and a wall forming the medium flow channel is injection molded by the polyphenylene sulfide composition.

[0008] Since the medium flow channel of the fluid pump is made of the material of the polyphenylene sulfide composition, it can have good alcoholysis resistance and high tensile strength in alcohol solution. DETAILED DESCRIPTION

[0009] The following specific examples are used to illustrate the implementation manners of this patent application. Those skilled in the art can easily understand other advantages and effects of this patent application from the content disclosed in this specification. This patent application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this patent application. It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0010] The raw materials used in the embodiments and comparative examples of the present invention are all commercially available products, as follows:

[0011] Polyphenylene sulfide (PPS) is produced by Zhejiang NHU Company Limited, with the grade of 1150C.

[0012] Polyphenylene oxide (PPO) is produced by Bluestar Company, with the grade of LXR045.

[0013] Glass fiber (GF) is produced by Jushi Company, with the grade of ESC10 - 03 - 584.

[0014] Maleic anhydride grafted PPO is produced by Shenyang Ketong Company, with the grade of KT - 24.

[0015] Carbodiimide is produced by LANXESS Company, with the grade of P400.

[0016] Polyethylene wax is produced by Mitsui Chemicals, Inc., with the grade of 800P.

[0017] Talc powder is produced by Liaoning Aihai Company, with the grade of PT20.

[0018] Antioxidant 1 is produced by Lion Specialty Chemicals Co., Ltd., with the grade of 1098.

[0019] Antioxidant 2 is produced by Qitai Technology Co., Ltd., with the grade of 608.

[0020] The following is a detailed description of the present invention in combination with specific embodiments:

[0021] Example 1:

[0022] (1) This example provides a polyphenylene sulfide composition, and the following components of raw materials are weighed according to the following parts by weight:

[0023]

[0024]

[0025] (2) After weighing the other components of the above raw materials except glass fiber according to the ratio, mix them in a high-speed mixer, add them to the twin-screw extruder from the main feeder, add glass fiber from the side feeder, and carry out melt blending and granulation through twin-screw extrusion to obtain the target product.

[0026] Example 2:

[0027] (1) This example provides a polyphenylene sulfide composition, and the raw material components are weighed according to the following parts by weight:

[0028]

[0029] (2) After weighing the other components of the above raw materials except glass fiber according to the ratio, mix them in a high-speed mixer, add them to the twin-screw extruder from the main feeder, add glass fiber from the side feeder, and carry out melt blending and granulation through twin-screw extrusion to obtain the target product.

[0030] Example 3:

[0031] (1) This example provides a polyphenylene sulfide composition, and the raw material components are weighed according to the following parts by weight:

[0032]

[0033]

[0034] (2) After weighing the other components of the above raw materials except glass fiber according to the ratio, mix them in a high-speed mixer, add them to the twin-screw extruder from the main feeder, add glass fiber from the side feeder, and carry out melt blending and granulation through twin-screw extrusion to obtain the target product.

[0035] Comparative Example 1:

[0036] (1) This comparative example provides a polyphenylene sulfide composition, which is prepared from the following raw materials in parts by weight:

[0037]

[0038] (2) After weighing the other components of the above raw materials except glass fiber according to the ratio, mix them in a high-speed mixer, add them to the twin-screw extruder from the main feeder, add glass fiber from the side feeder, and carry out melt blending and granulation through twin-screw extrusion to obtain the target product.

[0039] Comparative Example 2:

[0040] (1) This comparative example provides a polyphenylene sulfide composition, which is prepared from the following raw materials in parts by weight:

[0041]

[0042]

[0043] (2) After weighing other components of the above raw materials except glass fiber according to the ratio, they are mixed by a high-speed mixer and added to a twin-screw extruder from the main feeder. The glass fiber is added by the side feeder, and after melt blending and pelletizing through the twin-screw extrusion, the target product is obtained.

[0044] Comparative Example 3:

[0045] (1) This comparative example provides a polyphenylene sulfide composition prepared from the following raw materials in parts by weight:

[0046]

[0047] (2) After weighing other components of the above raw materials except glass fiber according to the ratio, they are mixed by a high-speed mixer and added to a twin-screw extruder from the main feeder. The glass fiber is added by the side feeder, and after melt blending and pelletizing through the twin-screw extrusion, the target product is obtained.

[0048] Comparative Example 4:

[0049] (1) This comparative example provides a polyphenylene sulfide composition prepared from the following raw materials in parts by weight:

[0050]

[0051]

[0052] (2) After weighing other components of the above raw materials except glass fiber according to the ratio, they are mixed by a high-speed mixer and added to a twin-screw extruder from the main feeder. The glass fiber is added by the side feeder, and after melt blending and pelletizing through the twin-screw extrusion, the target product is obtained.

[0053] Performance Test 1

[0054] The composite materials prepared in Example 1 and Comparative Examples 1-2 are processed into standard test specimens, and the notched Izod impact strength, tensile strength, elongation at break, notched Izod impact strength retention rate, tensile strength retention rate, and elongation at break retention rate of the prepared composite materials under the conditions of alcoholysis test are respectively tested. The test conditions are ethanol solution and an environment of 135 °C, and the material properties at 0 h, 250 h, 500 h, and 1000 h are respectively tested. The test results are shown in Table 1.

[0055]

[0056]

[0057] Table 1

[0058] According to the test results, the properties of the composite material formed by a polyphenylene sulfide composition (PPS / PPO-GF40) provided by the present application are about 10% lower than those of the material in Comparative Example 1 (PPS-GF40) under normal conditions. After the alcoholysis test at 135°C for 1000 h, the tensile strength retention rate of the polyphenylene sulfide composition (PPS / PPO-GF40) material provided by the present application is above 75%, and the notched impact strength and elongation at break are maintained above 60%, and the mechanical properties of the material have a good retention rate.

[0059] During an operation process, for the alcoholysis resistance performance test, the test material sample strips need to be put into G30 antifreeze to conduct the alcoholysis resistance effect test. Specifically, G30 antifreeze can be a mixed solution of ethylene glycol and deionized water with a volume ratio of 1:1.

[0060] Specifically, three sets of tensile test sample strips are put into a high-pressure reactor, and the G30 antifreeze medium is added to submerge the sample strips. The temperature of the reactor is set at 135°C. After the temperature reaches, one set is taken out for mechanical property test at 250 h, 500 h, and 1000 h respectively.

[0061] Mechanical property tests are carried out on each test sample strip, and the test standards can refer to Table 2:

[0062]

[0063] Table 2

[0064] In addition, the present application also provides an alcoholysis-resistant fluid pump applied to the injection molding of the above-mentioned polyphenylene sulfide composition. The fluid pump includes a flow chamber, and a medium flow channel for accommodating an alcohol solution is provided in the flow chamber. At least the wall forming the medium flow channel is injection-molded from the above-mentioned polyphenylene sulfide composition (PPS / PPO-GF40).

[0065] Due to the good mechanical stability and alcoholysis resistance of the polyphenylene sulfide composition (PPS / PPO-GF40), the interference of the alcohol medium in the pump on the mechanical properties of the material can be reduced accordingly, so that the fluid pump can not only use an alcohol medium with higher heat exchange efficiency for heat exchange performance, but also take into account a longer service life. In addition, the components of the polyphenylene sulfide can be reduced accordingly, so that while the overall fluid pump has better performance, the production and manufacturing costs are also greatly saved.

[0066] Performance Test 2

[0067] The composite materials prepared in Examples 2-3 and Comparative Examples 3-4 were processed into standard splines, and the notched impact strength, tensile strength, elongation at break, notched impact strength retention rate, tensile strength retention rate, and elongation at break retention rate of the prepared composite materials under alcoholysis test conditions were respectively tested. The test conditions were an ethanol solution and an environment of 135°C. The material properties were tested at 0 h, 500 h, and 1000 h respectively. The test results are shown in Table 3.

[0068]

[0069] Table 3

[0070] According to the analysis of the test data, by comparing Example 3 and Comparative Example 4, the lower limit value of the polyphenylene sulfide component can be estimated. That is, when the polyphenylene sulfide component is not less than 30 parts, the tensile strength retention rate of the polyphenylene sulfide composition (PPS / PPO-GF40) material provided by this application can be above 75% after the alcoholysis test at 135°C for 1000 h; by comparing Examples 2-3 and Comparative Example 4, the lower limit value of the polyphenylene oxide component can be estimated. That is, when the polyphenylene oxide component is not less than 10 parts, the notched impact strength and elongation at break of the polyphenylene sulfide composition (PPS / PPO-GF40) material provided by this application can be maintained above 60% after the alcoholysis test at 135°C for 1000 h. And when the polyphenylene oxide exceeds 20 parts, the mechanical properties show a decline or a stagnant increase, and the notched impact strength and elongation at break begin to show a slight decline or remain stable.

[0071] In summary, the preferred range of the combined ratio of polyphenylene sulfide and polyphenylene oxide in the polyphenylene sulfide composition (PPS / PPO-GF40) material is 40-55 parts of polyphenylene sulfide (PPS), 10-20 parts of polyphenylene oxide (PPO), combined with 3-8 parts of compatibilizer, 40 parts of glass fiber, and a small amount of alcoholysis-resistant agent, antioxidant, mold release agent, and nucleating agent are mixed at high speed to form the composite material of this application, so as to achieve that after the alcoholysis test at 135°C for 1000 h, the tensile strength retention rate of the polyphenylene sulfide composition (PPS / PPO-GF40) material provided by this application is above 75%, the notched impact strength and elongation at break are maintained above 60%, and the mechanical properties of the material can still have a good retention rate, meeting the usage requirements of the fluid pump scenario.

[0072] It should be noted that the above examples are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above examples, those of ordinary skill in the art should understand that those skilled in the art can still modify the present invention or make equivalent replacements. All technical solutions and their improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A polyphenylene sulfide composition for preparing a fluid pump applied to a thermal management system, characterized in that, The invention comprises polyphenylene sulfide, polyphenylene ether, glass fiber, an anti-alcoholysis agent and a processing aid. Calculated by weight, the polyphenylene sulfide component is 40 to 55 parts, the polyphenylene sulfide component is not less than the glass fiber, the glass fiber component is at least twice that of the polyphenylene ether component, and the anti-alcoholysis agent component is 1 to 4 parts.

2. The polyphenylene sulfide composition according to claim 1, wherein The glass fiber accounts for 40 parts, and the polyphenylene ether accounts for 10 to 20 parts.

3. The polyphenylene sulfide composition according to claim 1 or 2, characterized in that The processing aid includes a compatibilizer, and the component of the compatibilizer is 3 to 8 parts.

4. The polyphenylene sulfide composition according to claim 3, characterized in that, The compatibilizer is methyl acrylate copolymer or maleic anhydride grafted PPO copolymer.

5. The polyphenylene sulfide composition according to any one of claims 1-4, characterized in that, The processing aid also includes an antioxidant, and the component of the antioxidant is 0.2 to 0.6 parts.

6. The polyphenylene sulfide composition according to claim 5, wherein The antioxidant is prepared by mixing antioxidant 1098 and antioxidant 608 in a ratio of 1:

1.

7. The polyphenylene sulfide composition according to any one of claims 1-6, characterized in that, The processing aid also includes a release agent, which is polyethylene wax, and the component of the release agent is 0.3 parts.

8. The polyphenylene sulfide composition according to any one of claims 1-7, characterized in that, The processing aid further includes a nucleating agent, the nucleating agent is talcum powder, and the component of the nucleating agent is 0.3 parts.

9. The polyphenylene sulfide composition according to any one of claims 1-8, characterized in that The tensile strength retention rate of the polyphenylene sulfide composition material under alcoholysis conditions is above 60%.

10. A fluid pump, characterized in that, The polyphenylene sulfide composition comprises the polyphenylene sulfide composition according to any one of claims 1 to 9, wherein the fluid pump comprises a flow cavity, a medium flow channel for accommodating an alcohol solution is provided in the flow cavity, and a wall forming the medium flow channel is injection molded by the polyphenylene sulfide composition.

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