A wear-resistant and high-temperature resistant PPS composite material and preparation method thereof

Abstract

The present invention relates to the technical field of aromatic polymer compounds, and specifically to a wear-resistant and high-temperature resistant PPS composite material and a preparation method thereof; the composite material comprises the following components in parts by weight: 32 to 52 parts by weight of PPS material; 3 to 15 parts by weight of wear-resistant agent, 30 to 40 parts by weight of glass fiber, 0.5 to 2.0 parts by weight of lubricant, 0.3 to 0.5 parts by weight of antioxidant, and 0.2 to 2.0 parts by weight of other additives; the PPS material comprises high-crystallinity PPS, and the crystallinity of the high-crystallinity PPS is not less than 70%; the wear-resistant agent comprises at least two PTFE components of different particle sizes; and the average particle size of the PTFE component is not higher than 12 microns. In the present invention, the wear-resistant agent, nucleating agent, and the components of the PPS material, the ratio of key components, etc. in the composite material are optimized and adjusted in a targeted manner, so as to effectively improve the mechanical properties of the PPS composite material, and significantly improve the tensile strength, impact strength, and flexural strength of the composite material, so that the tensile strength of the composite material reaches ≥150MPa, the flexural strength ≥230MPa, and the notched impact strength ≥8KJ / m 2 .

Description

Technical Field

[0001] The invention relates to the technical field of aromatic polymer compounds, with an IPC main classification number of C08L71 / 00, and specifically relates to a wear-resistant and high-temperature resistant PPS composite material and a preparation method thereof. Background Art

[0002] Polyphenylene sulfide (PPS) is a polymer with high crystallinity, hard and brittle, with a main molecular chain composed of benzene rings and sulfur atoms arranged alternately and strong chain regularity. Due to its low and stable dielectric constant, dielectric loss tangent, arc resistance and other electrical properties, chemical corrosion resistance, as well as excellent hardness, creep resistance, wear resistance and other properties, the polymer is widely used in the fields of automobiles, electronics and electrical, machinery industry, petrochemical industry, etc. In addition, due to the brittleness and poor mechanical properties such as tensile strength, bending strength, and impact strength caused by the rigid molecular structure of PPS polymer, blending modification is usually adopted, such as adding an appropriate amount of glass fiber to reinforce it, so as to achieve its stronger load resistance and bearing capacity. Although traditional glass fiber (glass fiber) reinforced PPS can improve the wear resistance of PPS material to a certain extent, the improvement result is not significant enough, so it is often necessary to add specific wear-resistant agent components to solve its wear resistance and other problems. However, the applicant found that although the addition of the above-mentioned glass fiber, wear-resistant agent and other modified components can significantly improve the strength, wear resistance and other properties of the PPS composite material to a certain extent, it will also bring some new problems. For example, when the traditional single wear-resistant agent is used to improve the wear resistance of the composite material, it will reduce its impact resistance to a certain extent and affect the processing performance of the composite material. Especially when the material components contain a certain amount of glass fiber and other components, the impact on its processing performance is particularly significant. In addition, the addition of the above-mentioned multiple modified components will also affect the crystallization performance of the PPS polymer melt, thereby affecting the comprehensive properties of the composite material. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a wear-resistant and high-temperature resistant PPS composite material. By optimizing and adjusting the formula components of the composite material and the ratio of specific components, the composite material has higher tensile strength, flexural strength, impact strength and other properties, and significantly improves its wear resistance, crystallization characteristics, etc.; the PPS composite material includes the following components in parts by weight:

[0004] 32-52 parts by weight of PPS material;

[0005] 3 to 15 parts by weight of anti-wear agent;

[0006] 30-40 parts by weight of glass fiber;

[0007] 0.5-2.0 parts by weight of lubricant;

[0008] 0.3-0.5 parts by weight of antioxidant;

[0009] 0.2-2.0 parts by weight of other additives;

[0010] The PPS material includes high-crystallinity PPS, and the crystallinity of the high-crystallinity PPS is not less than 70%;

[0011] The anti-wear agent comprises at least two PTFE components with different particle sizes; the average particle size of the PTFE components is not higher than 12 microns.

[0012] As a preferred technical solution of the present invention, the PTFE component includes a first PTFE component, and the average particle size of the first PTFE component is 2 to 6 microns; the PTFE component also includes a second PTFE component, and the average particle size of the second PTFE component is 8 to 12 microns.

[0013] As a preferred technical solution of the present invention, the first PTFE component and the second PTFE component have the same mass.

[0014] As a preferred technical solution of the present invention, the wear-resistant agent further comprises metal sulfide, and the mass ratio of the metal sulfide to the PTFE component is (1.5-2.5):1.

[0015] As a preferred technical solution of the present invention, the metal sulfide consists of single-phase metal sulfide and multi-phase metal sulfide; preferably, the single-phase metal sulfide is a compound formed by metal molybdenum and sulfur.

[0016] As a preferred technical solution of the present invention, the content of the single-phase metal sulfide accounts for 70wt% or more of the total amount of the metal sulfide; preferably, the multi-phase metal sulfide is a new type of synthetic multi-phase sulfide based on molybdenum, tungsten and manganese.

[0017] As a preferred technical solution of the present invention, the other auxiliary agents include a nucleating agent, and the nucleating agent includes a sorbitol-based polyhydroxy small molecule compound.

[0018] As a preferred technical solution of the present invention, the nucleating agent further comprises an aromatic carboxylic acid aluminum salt compound; preferably, the mass ratio of the sorbitol polyhydroxy small molecule compound to the aromatic carboxylic acid aluminum salt compound is 1:(0.8-1.5).

[0019] As a preferred technical solution of the present invention, the glass fiber is unmodified chopped glass fiber and / or high-strength glass fiber.

[0020] The present invention also provides a method for preparing the PPS composite material as described above, which comprises the following steps:

[0021] Step 1: 32-52 parts by weight of dried PPS material, 3-15 parts by weight of anti-wear agent, 0.5-2.0 parts by weight of lubricant, 0.3-0.5 parts by weight of antioxidant, and 0.2-2.0 parts by weight of other additives are measured, and the above components are placed in a blender and stirred to mix uniformly to obtain a mixed material;

[0022] Step 2: 30 to 40 parts by weight of glass fiber are measured and added into a twin-screw extruder together with the mixed material, and the mixture is heated, melted, extruded, and granulated to obtain the PPS composite material.

[0023] The wear-resistant and high-temperature-resistant PPS composite material provided in the present invention has the following beneficial effects compared with existing related products:

[0024] The present invention optimizes and adjusts the components of the wear-resistant agent, nucleating agent and PPS material in the composite material, the ratio of key components, etc., effectively improves the mechanical properties of the PPS composite material, and significantly improves the tensile strength, impact strength and flexural strength of the composite material, so that the tensile strength of the composite material reaches ≥150MPa, the flexural strength is ≥230MPa, and the notched impact strength is ≥8KJ / m 2 . Moreover, by optimizing the structure and proportion of key components, the wear resistance can be significantly improved, the Taber wear loss can be significantly reduced, and the thermal deformation can be ≥265℃, the ball pressure temperature is 265℃, and the Taber wear loss (1000 revolutions, 1000g, CS-17 wheel) is <5mg, so that the composite material can be widely used in more demanding environments. Moreover, through the above optimization, the cooling crystallization temperature of the composite material melt can be significantly improved, so that the composite material can be cooled at a higher temperature during the processing process, effectively avoiding the imperfect cooling crystallization caused by rapid cooling in a short period of time, causing defects in the material's lattice, so that the mechanical properties, thermal properties, wear resistance and other comprehensive properties of the PPS composite material are comprehensively improved. DETAILED DESCRIPTION

[0025] The first aspect of the present invention provides a wear-resistant and high-temperature resistant PPS composite material comprising the following components in parts by weight:

[0026] 32-52 parts by weight of PPS material;

[0027] 3 to 15 parts by weight of anti-wear agent;

[0028] 30-40 parts by weight of glass fiber;

[0029] 0.5-2.0 parts by weight of lubricant;

[0030] 0.3-0.5 parts by weight of antioxidant;

[0031] 0.2-2.0 parts by weight of other additives;

[0032] The PPS material includes high-crystallinity PPS, and the crystallinity of the high-crystallinity PPS is not less than 70%;

[0033] The anti-wear agent comprises at least two PTFE components with different particle sizes; the average particle size of the PTFE components is not higher than 12 microns.

[0034] When the content, dosage, or other values ​​or parameters in the present invention are expressed as a range, a preferred range, or a range defined by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when the range "2 to 8" is disclosed, the described range should be interpreted as including the range "2 to 8", "2 to 7", "2 to 6", "2 to 5 and 6,7", "2 to 3 and 4 to 8", etc.

[0035] The PPS material described in the present invention can be a mixed material containing polyphenylene sulfide, or it can be a pure polyphenylene sulfide material, wherein the PPS material described contains high-crystallinity PPS, wherein the term "crystallinity" is a physical quantity for measuring the degree of crystallinity of a polymer well known to those skilled in the art, and can be tested by conventional means using instruments such as DSC. The crystallinity of the high-crystallinity PPS is not less than 70%, preferably, its crystallinity is not less than 72%, and its crystallinity can be 71%, 72%, 73%, 74%, 74.5%, 75%, 75.5%, 76%, 76.5%, 77%, 77.5%, 78%, 79%, etc.; preferably, the relative molecular weight of the high-crystallinity PPS is 4000-5000.

[0036] In the present invention, there is no special limitation on the source of the above-mentioned PPS material, and commercially available materials known to those skilled in the art may be used, including but not limited to Basic Innovative Plastics PX940U-701, Chongqing Jushi GAT series (e.g., GAT01, GAT02, GAT03, GAT04, GAT05, GAT06, GAT07, GAT08), Changxian New Materials' CXP series (e.g., CXP-100, CXP-300, CXP-500, CXP-700, CXP-140Q, CXP-180Q, CXP-200Q, CXP-JY10, CXP-JU80, CXPJY140, etc.), Shinwa PPS resin, Toray series PPS products of Japan Toray (e.g., Japan Toray PPS A900), etc.

[0037] The anti-wear agent described in the present invention is a component used to improve the wear resistance of the PPS polymer material, thereby expanding the application range of the PPS composite material. Based on 32 to 52 parts by weight of the PPS material, the amount of the anti-wear agent is 3 to 15 parts by weight, and can be 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, etc.

[0038] The wear-resistant agent described in this invention comprises at least two PTFE components with different particle sizes, wherein the different particle sizes refer to different average particle sizes. Preferably, the two PTFE components with different particle sizes are low molecular weight PTFE ultrafine powders. Furthermore, the average particle size of the PTFE component is not higher than 12 microns, and can be 12 microns, 11 microns, 10 microns, 9 microns, 8 microns, 7 microns, 6 microns, 5 microns, 4 microns, 3 microns, 2 microns, 1 micron, etc.; the average particle size described in the present invention is a physical quantity that measures the size of the particles, and can be measured in a manner familiar to those skilled in the art.

[0039] In some preferred embodiments, the PTFE component includes a first PTFE component, and the average particle size of the first PTFE component is 2 to 6 microns; for example, its average particle size is 2 microns, 2.5 microns, 3 microns, 3.5 microns, 4 microns, etc.; the PTFE component also includes a second PTFE component, and the average particle size of the second PTFE component is 8 to 12 microns; for example, its average particle size is 8 microns, 8.5 microns, 9 microns, 9.5 microns, 10 microns, 11 microns, 12 microns, etc.; further preferably, the content (mass content) ratio of the first PTFE component and the second PTFE component is 1: (0.5 to 1.5), and for example, its content ratio is 1: 0.5, 1: 0.7, 1: 0.8, 1: 1, 1: 1.2, 1: 1.5, etc.; further preferably, the first PTFE component and the second PTFE component have the same mass.

[0040] It should be understood that the terms "first", "second", etc. in the present invention are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as being in accordance with a specific priority order.

[0041] The specific source of the above-mentioned PTFE component is not particularly limited in the present invention, and raw materials familiar to those skilled in the art can be used, including but not limited to 3M Dyneon series PTFE TF materials from the United States, including but not limited to TF 9201Z (average particle size 9 microns), TF 9202Z (average particle size 4 microns), TF 9207Z (average particle size 4 microns), TF 9205Z (average particle size 8 microns), etc.

[0042] In some preferred embodiments, the wear-resistant agent further comprises metal sulfide, which is a metal sulfide obtained by the reaction of one or more metals with sulfur, wherein the one or more metals include but are not limited to metal molybdenum, metal tungsten, tin, bismuth, copper, lead, manganese, etc.; the mass ratio of the metal sulfide to the PTFE component is (1.5-2.5):1, and the mass ratio can be 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1, 2.0:1, 2.1:1, 2.2:1, 2.3:1, 2.4:1, 2.5:1, etc.; preferably, the mass ratio of the metal sulfide to the PTFE component is 2:1.

[0043] In some preferred embodiments, the metal sulfide consists of a single-phase metal sulfide and a multi-phase metal sulfide; wherein the single-phase metal sulfide refers to a single metal sulfide formed by the reaction of a single metal component with sulfur, and the multi-phase metal sulfide refers to a sulfide containing multiple metals formed by the reaction of at least two or more metals with sulfur; preferably, the single-phase metal sulfide is a compound formed by metal molybdenum and sulfur, such as molybdenum disulfide; further preferably, the multi-phase metal sulfide is a new synthetic multi-phase sulfide based on molybdenum, tungsten and manganese.

[0044] In some preferred embodiments, the content of the single-phase metal sulfide accounts for 70wt% or more of the total amount of the metal sulfide; preferably, the mass ratio of the single-phase metal sulfide to the multi-phase metal sulfide is (3.5-5):1, and the mass ratio can be 3.5:1, 3.8:1, 4.0:1, 4.2:1, 4.5:1, etc.; preferably, the mass ratio is 4.0:1.

[0045] The specific source of the above-mentioned metal sulfide is not particularly limited in the present invention, and components familiar to those skilled in the art can be used, including but not limited to single-phase metal sulfides such as molybdenum disulfide (MOS XF), tungsten disulfide (WS2, WS5), tin disulfide (SNS2), copper sulfide (CB 500), synthetic bismuth sulfide (BIS 84), and new synthetic compounds based on tin sulfide (SLS22, SLS22F) from Austria's Troboko; it also includes but is not limited to new synthetic multiphase sulfides based on molybdenum and tungsten (WS 31, WS 31F) from Austria's Troboko, and new synthetic multiphase sulfides based on molybdenum, tungsten and manganese (WS 44S), etc.; in some preferred embodiments, the D50 particle size of the metal sulfide is 2 to 25 microns, and for example, its D50 particle size can be 2 microns, 3 microns, 6 microns, 8 microns, 12 microns, 15 microns, 18 microns, 20 microns, 25 microns, etc.

[0046] The wear-resistant and high-temperature resistant PPS composite material described in the present invention also contains a certain amount of glass fiber (glass fiber). Based on 32 to 52 parts by weight of the PPS material, the amount of the glass fiber is 30 to 40 parts by weight. For example, the amount is 30 parts by weight, 31 parts by weight, 32 parts by weight, 33 parts by weight, 34 parts by weight, 35 parts by weight, 36 parts by weight, 37 parts by weight, 38 parts by weight, 39 parts by weight, 40 parts by weight, etc.; the source of the specific type of the glass fiber is not particularly limited in the present invention, and various types of glass fiber materials familiar to those skilled in the art can be used. As some preferred embodiments of the present invention, the glass fiber is unmodified chopped glass fiber and / or high-strength glass fiber. The unmodified chopped glass fibers described in the present invention refer to alkali-free glass fibers prepared by a method well known to those skilled in the art, and chopped glass fibers with lengths of 4.5 mm, 6.0 mm, etc. can be used; the high-strength glass fibers are high-strength glass fibers obtained by modification in a method well known to those skilled in the art, including but not limited to glass fibers treated with a silane coupling agent in a manner well known to those skilled in the art, such as chopped glass fibers (high-strength glass fibers) treated with a silane coupling agent with a diameter of about 11 μm and a length of 6.0 mm.

[0047] It should also be understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. That is, the above-mentioned glass fiber can be a single unmodified chopped glass fiber, a single high-strength glass fiber, or a component containing both unmodified chopped glass fiber and high-strength glass fiber.

[0048] The wear-resistant and high-temperature resistant PPS composite material of the present invention further comprises a certain amount of lubricant. Based on 32 to 52 parts by weight of the PPS material, the amount of the lubricant is 0.5 to 2.0 parts by weight. For example, the amount is 0.5 parts by weight, 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, 1.0 parts by weight, 1.1 parts by weight, 1.2 parts by weight, 1.3 parts by weight, 1.4 parts by weight, 1.5 parts by weight, 1.6 parts by weight, 1.7 parts by weight, 1.8 parts by weight, 1.9 parts by weight, 2.0 parts by weight, etc.; the specific composition and source of the lubricant are not particularly limited in the present invention, and various types of lubricants well known to those skilled in the art can be used, including but not limited to silicone lubricants (including but not limited to PL-300, PL-310, PL-320 silicone masterbatch; EccoGrease SG10-2, OKS1110 multifunctional silicone grease, Kaijie silicone plastic lubricant, methyl silicone oil, benzyl silicone oil, ethyl silicone oil, etc.), polyethylene wax and other polymer wax lubricants, microcrystalline wax, etc.

[0049] The wear-resistant and high-temperature resistant PPS composite material of the present invention further comprises a certain amount of antioxidant. Based on 32 to 52 parts by weight of the PPS material, the amount of the antioxidant is 0.3 to 0.5, and can be 0.3 parts by weight, 0.4 parts by weight, 0.5 parts by weight, etc.; the specific type and source of the antioxidant are not particularly limited in the present invention, and various antioxidants known to those skilled in the art can be used, including but not limited to hindered phenol antioxidants (such as antioxidant 1010, etc.), phosphite antioxidants (such as antioxidant 168, antioxidant 626, 608, etc.), high temperature antioxidants (such as Revonox 608, GA-80, etc.), nano-SiO2 composite antioxidants, etc.

[0050] The wear-resistant and high-temperature resistant PPS composite material of the present invention further comprises a certain amount of other additives. Based on 32 to 52 parts by weight of the PPS material, the amount of the other additives is 0.2 to 2.0 parts by weight. For example, the amount of the other additives may be 0.2 to 2.0 parts by weight, 0.3 to 0.4 parts by weight, 0.5 to 0.6 parts by weight, 0.7 to 0.8 parts by weight, 0.9 to 1.0 parts by weight, 1.1 to 1.2 parts by weight, 1.3 to 1.4 parts by weight, 1.5 to 1.6 parts by weight, 1.7 to 1.8 parts by weight, 1.9 to 2.0 parts by weight, etc. The other additives of the present invention may be other enhancers known to those skilled in the art, including but not limited to tensile strength enhancers, impact strength enhancers, tensile strength enhancers. Tensile strength enhancer, etc., can be selected and used according to specific needs; as some preferred embodiments of the present invention, the other additives include a nucleating agent, and the nucleating agent is a component that can promote the crystallization of PPS material; the specific composition and source of the nucleating agent are not particularly limited in the present invention, and can include but are not limited to dibenzoyl zinc oxide (DPZ), silica powder, organic small molecules (such as acetic anhydride, urea, polyhydroxy compounds, etc.), etc.; further preferably, the nucleating agent includes a sorbitol-type polyhydroxy small molecule compound; further preferably, the sorbitol-type polyhydroxy small molecule compound structure contains a benzene ring structure and / or a saturated ring structure, for example, including but not limited to Qirunyuan RY-698 (dimethylbenzylidene) -D-sorbitol (CAS No.: 135861-56-2), etc.

[0051] In some preferred embodiments, the nucleating agent further comprises an aromatic carboxylate aluminum salt compound; the aromatic carboxylate aluminum salt compound is a tert-butyl substituted compound, for example, including but not limited to Qirunyuan RY-501 (di(4-tert-butyl-benzoic acid) aluminum hydroxide, etc.; in some preferred technical schemes, the mass ratio of the sorbitol polyhydroxy small molecule compound to the aromatic carboxylate aluminum salt compound is 1: (0.8-1.5), and the mass ratio can be 1: 0.8, 1: 0.9, 1: 1, 1: 1.1, 1: 1.2, 1: 1.3, 1: 1.4, 1: 1.5, etc.

[0052] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0053] A second aspect of the present invention provides a method for preparing the PPS composite material as described above, comprising the following steps:

[0054] Step 1: 32-52 parts by weight of dried PPS material, 3-15 parts by weight of anti-wear agent, 0.5-2.0 parts by weight of lubricant, 0.3-0.5 parts by weight of antioxidant, and 0.2-2.0 parts by weight of other additives are measured, and the above components are placed in a blender and stirred to mix uniformly to obtain a mixed material;

[0055] Step 2: 30 to 40 parts by weight of glass fiber are measured and added into a twin-screw extruder together with the mixed material, and the mixture is heated, melted, extruded, and granulated to obtain the PPS composite material.

[0056] In the present invention, other process parameters in the preparation process of the composite material are not particularly limited and can be determined and prepared in a manner well known to those skilled in the art.

[0057] The present invention is described in detail below by way of examples. It is necessary to point out here that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by professionals and technicians in this field based on the content of the present invention above still belong to the scope of protection of the present invention.

[0058] Example 1

[0059] This embodiment provides a wear-resistant and high-temperature resistant PPS composite material, which includes the following components in parts by weight:

[0060]

[0061] The PPS material is a high-crystallinity PPS (Basic Innovative Plastics PX940U-701), the crystallinity of the high-crystallinity PPS is 75%, and the relative molecular weight is about 5000; the wear-resistant agent is composed of PTFE and metal sulfide, and the mass ratio of the PTFE and the metal sulfide is 1:2; wherein the PTFE is composed of a first PTFE component and a second PTFE component, and the two have the same mass, wherein the average particle size of the first PTFE component is 4 microns (3M Dyneon TF 9202Z), and the average particle size of the second PTFE component is 9 microns (3M Dyneon TF 9201Z); the metal sulfide is composed of a single-phase metal sulfide and a multi-phase metal sulfide, and the mass ratio is 4:1; the single-phase metal sulfide is molybdenum disulfide with a D50 particle size of 8 microns, and the multi-phase metal sulfide is a new synthetic multi-phase sulfide based on molybdenum, tungsten and manganese with a D50 particle size of 6 microns (Austrian Teboko WS 44S); the glass fiber is a chopped glass fiber with a diameter of about 11 μm and a length of 6.0 mm treated with a silane coupling agent; the lubricant is OKS1110 multifunctional silicone grease; the antioxidant is 608; The other auxiliary agent is a nucleating agent, which is composed of a sorbitol-based polyhydroxy small molecule compound containing a benzene ring and a saturated ring structure (Qirunyuan RY-698 (dimethylbenzylidene)-D-sorbitol) and an aromatic carboxylic acid aluminum salt compound (Qirunyuan RY-501 di(4-tert-butyl-benzoic acid) aluminum hydroxide), and the mass ratio is 1:1.2.

[0062] Example 2

[0063] This embodiment provides a wear-resistant and high-temperature resistant PPS composite material, which includes the following components in parts by weight:

[0064]

[0065] The PPS material is a high-crystallinity PPS (Basic Innovative Plastics PX940U-701), the crystallinity of the high-crystallinity PPS is 75%, and the relative molecular weight is about 5000; the wear-resistant agent is composed of PTFE and metal sulfide, and the mass ratio of the PTFE and the metal sulfide is 1:2; wherein the average particle size of the PTFE is 4 microns (3MDyneon TF 9202Z); the metal sulfide is composed of a single-phase metal sulfide and a multi-phase metal sulfide, and the mass ratio is 4:1; the single-phase metal sulfide is molybdenum disulfide with a D50 particle size of 8 microns, and the multi-phase metal sulfide is a new synthetic multi-phase sulfide based on molybdenum, tungsten and manganese with a D50 particle size of 6 microns (Austrian Teboko WS 44S); the glass fiber is a chopped glass fiber with a diameter of about 11 μm and a length of 6.0 mm treated with a silane coupling agent; the lubricant is OKS1110 multifunctional silicone grease; the antioxidant is 608; The other auxiliary agent is a nucleating agent, which is composed of a sorbitol-based polyhydroxy small molecule compound containing a benzene ring and a saturated ring structure (Qirunyuan RY-698 (dimethylbenzylidene)-D-sorbitol) and an aromatic carboxylic acid aluminum salt compound (Qirunyuan RY-501 di(4-tert-butyl-benzoic acid) aluminum hydroxide), and the mass ratio is 1:1.2.

[0066] Example 3

[0067] This embodiment provides a wear-resistant and high-temperature resistant PPS composite material, which includes the following components in parts by weight:

[0068]

[0069]

[0070] The PPS material is high-crystallinity PPS (Basic Innovative Plastics PX940U-701), the crystallinity of the high-crystallinity PPS is 75%, and the relative molecular weight is about 5000; the wear-resistant agent is composed of PTFE and metal sulfide, and the mass ratio of the PTFE and the metal sulfide is 1:2; wherein the PTFE is composed of a first PTFE component and a second PTFE component, and the two have the same mass, wherein the average particle size of the first PTFE component is 4 microns (3M Dyneon TF 9202Z), and the average particle size of the second PTFE component is 9 microns (3M Dyneon TF 9201Z); the metal sulfide is a single-phase metal sulfide, and its D50 particle size is 8 microns of molybdenum disulfide; the glass fiber is a short-cut glass fiber treated with a silane coupling agent with a diameter of about 11 μm and a length of 6.0 mm; the lubricant is OKS1110 multifunctional silicone grease; the antioxidant is 608; The other auxiliary agent is a nucleating agent, which is composed of a sorbitol-based polyhydroxy small molecule compound containing a benzene ring and a saturated ring structure (Qirunyuan RY-698 (dimethylbenzylidene)-D-sorbitol) and an aromatic carboxylic acid aluminum salt compound (Qirunyuan RY-501 di(4-tert-butyl-benzoic acid) aluminum hydroxide), and the mass ratio is 1:1.2.

[0071] Example 4

[0072] This embodiment provides a wear-resistant and high-temperature resistant PPS composite material, which includes the following components in parts by weight:

[0073]

[0074] The PPS material is a high-crystallinity PPS (Basic Innovative Plastics PX940U-701), the crystallinity of the high-crystallinity PPS is 75%, and the relative molecular weight is about 5000; the wear-resistant agent is composed of PTFE and metal sulfide, and the mass ratio of the PTFE and the metal sulfide is 1:2; wherein the average particle size of the PTFE is 9 microns (3MDyneon TF 9201Z); the metal sulfide is composed of a single-phase metal sulfide and a multi-phase metal sulfide, and the mass ratio is 4:1; the single-phase metal sulfide is molybdenum disulfide with a D50 particle size of 8 microns, and the multi-phase metal sulfide is a new synthetic multi-phase sulfide based on molybdenum, tungsten and manganese with a D50 particle size of 6 microns (Austrian Teboko WS 44S); the glass fiber is a chopped glass fiber with a diameter of about 11 μm and a length of 6.0 mm treated with a silane coupling agent; the lubricant is OKS1110 multifunctional silicone grease; the antioxidant is 608; The other auxiliary agent is a nucleating agent, which is composed of a sorbitol-based polyhydroxy small molecule compound containing a benzene ring and a saturated ring structure (Qirunyuan RY-698 (dimethylbenzylidene)-D-sorbitol) and an aromatic carboxylic acid aluminum salt compound (Qirunyuan RY-501 di(4-tert-butyl-benzoic acid) aluminum hydroxide), and the mass ratio is 1:1.2.

[0075] Example 5

[0076] This embodiment provides a wear-resistant and high-temperature resistant PPS composite material, which includes the following components in parts by weight:

[0077]

[0078] The PPS material is a high-crystallinity PPS (Basic Innovative Plastics PX940U-701), the crystallinity of the high-crystallinity PPS is 75%, and the relative molecular weight is about 5000; the wear-resistant agent is composed of PTFE and metal sulfide, and the mass ratio of the PTFE and the metal sulfide is 1:2; wherein the PTFE is composed of a first PTFE component and a second PTFE component, and the two have the same mass, wherein the average particle size of the first PTFE component is 4 microns (3M Dyneon TF 9202Z), and the average particle size of the second PTFE component is 9 microns (3M Dyneon TF 9201Z); the metal sulfide is a multiphase metal sulfide, and its D50 particle size is 6 microns, which is a new type of synthetic multiphase sulfide based on molybdenum, tungsten and manganese (Austrian Teboko WS 44S); the glass fiber is a chopped glass fiber with a diameter of about 11 μm and a length of 6.0 mm treated with a silane coupling agent; the lubricant is OKS1110 multifunctional silicone grease; the antioxidant is 608; The other auxiliary agent is a nucleating agent, which is composed of a sorbitol-based polyhydroxy small molecule compound containing a benzene ring and a saturated ring structure (Qirunyuan RY-698 (dimethylbenzylidene)-D-sorbitol) and an aromatic carboxylic acid aluminum salt compound (Qirunyuan RY-501 di(4-tert-butyl-benzoic acid) aluminum hydroxide), and the mass ratio is 1:1.2.

[0079] Example 6

[0080] This embodiment provides a wear-resistant and high-temperature resistant PPS composite material, which includes the following components in parts by weight:

[0081]

[0082] The PPS material is a high-crystallinity PPS (Basic Innovative Plastics PX940U-701), the crystallinity of the high-crystallinity PPS is 75%, and the relative molecular weight is about 5000; the wear-resistant agent is composed of PTFE and metal sulfide, and the mass ratio of the PTFE and the metal sulfide is 1:2; wherein the PTFE is composed of a first PTFE component and a second PTFE component, and the two have the same mass, wherein the average particle size of the first PTFE component is 4 microns (3M Dyneon TF 9202Z), and the average particle size of the second PTFE component is 9 microns (3M Dyneon TF 9201Z); the metal sulfide is composed of a single-phase metal sulfide and a multi-phase metal sulfide, and the mass ratio is 4:1; the single-phase metal sulfide is molybdenum disulfide with a D50 particle size of 8 microns, and the multi-phase metal sulfide is a new synthetic multi-phase sulfide based on molybdenum, tungsten and manganese with a D50 particle size of 6 microns (Austrian Teboko WS 44S); the glass fiber is a chopped glass fiber with a diameter of about 11 μm and a length of 6.0 mm treated with a silane coupling agent; the lubricant is OKS1110 multifunctional silicone grease; the antioxidant is 608; The other auxiliary agent is a nucleating agent, which is a sorbitol-based polyhydroxy small molecule compound containing a benzene ring and a saturated ring structure (Qirunyuan RY-698 (dimethylbenzylidene)-D-sorbitol).

[0083] Example 7

[0084] This embodiment provides a wear-resistant and high-temperature resistant PPS composite material, which includes the following components in parts by weight:

[0085]

[0086] The PPS material is a high-crystallinity PPS (Basic Innovative Plastics PX940U-701), the crystallinity of the high-crystallinity PPS is 75%, and the relative molecular weight is about 5000; the wear-resistant agent is composed of PTFE and metal sulfide, and the mass ratio of the PTFE and the metal sulfide is 1:2; wherein the PTFE is composed of a first PTFE component and a second PTFE component, and the two have the same mass, wherein the average particle size of the first PTFE component is 4 microns (3M Dyneon TF 9202Z), and the average particle size of the second PTFE component is 9 microns (3M Dyneon TF 9201Z); the metal sulfide is composed of a single-phase metal sulfide and a multi-phase metal sulfide, and the mass ratio is 4:1; the single-phase metal sulfide is molybdenum disulfide with a D50 particle size of 8 microns, and the multi-phase metal sulfide is a new synthetic multi-phase sulfide based on molybdenum, tungsten and manganese with a D50 particle size of 6 microns (Austrian Teboko WS 44S); the glass fiber is a chopped glass fiber with a diameter of about 11 μm and a length of 6.0 mm treated with a silane coupling agent; the lubricant is OKS1110 multifunctional silicone grease; the antioxidant is 608; The other auxiliary agent is a nucleating agent, which is an aromatic carboxylic acid aluminum salt compound (Qirunyuan RY-501 di(4-tert-butyl-benzoic acid) aluminum hydroxide).

[0087] Performance Testing

[0088] The applicant measured each component according to the proportion of the PPS composite material raw material in the above embodiment, and then placed the dried and ready-to-use PPS material, lubricant, antioxidant and other additives in a mixer and stirred for 15 minutes to obtain a mixed material. The mixed material and glass fiber were then added to a twin-screw extruder, and the operating temperature of the twin-screw extruder was set to 290-320°C, the screw speed was 300 rpm, and the PPS composite material sample was obtained by heating and melting and extruding. The obtained samples were then subjected to relevant performance tests. For specific test standards and results, please refer to the following information.

[0089] 1) According to ISO0527-2 international standard, all the above samples were tested for tensile strength performance at a tensile speed of 5 mm / min;

[0090] 2) All the above samples were tested for bending strength performance according to ISO178 international test standard, and the strain rate in the test was 1% / min;

[0091] 3) The notched impact strength of all the above samples was tested according to ISO179 international testing standard.

[0092] The above test results are shown in Table 1

[0093] Table 1 Mechanical properties test results

[0094] Tensile strength / MPa Bending strength / MPa <![CDATA[Impact strength kJ / m 2 > Example 1 157 239 8.7 Example 2 153 228 8.2 Example 3 152 234 8.3 Example 4 149 235 7.8 Example 5 153 234 8.0 Example 6 146 230 8.1 Example 7 144 229 8.2

[0095] 4) All the above samples were tested for heat deformation temperature (1.8MPa) according to ISO75 international test standard;

[0096] 5) All the above samples were subjected to Taber abrasion test (1000 revolutions, 1000 g, CS-17 wheel) according to ISO9352 international test standard;

[0097] 6) Use DSC differential scanning calorimeter to test the cooling crystallization temperature of the above samples after heating and melting.

[0098] The above test results are shown in Table 2

[0099] Table 2 Thermal performance test

[0100] Heat deformation temperature / 1.8MPa Taber wear loss / (mg / 1000 revolutions) Cooling crystallization temperature / ℃ Example 1 269℃ 3.6 230 Example 2 266℃ 4.8 230 Example 3 265℃ 4.1 225 Example 4 263℃ 3.5 224 Example 5 265℃ 4.5 227 Example 6 264℃ 5.2 220 Example 7 266℃ 5.3 217

[0101] In addition, the applicant conducted a ball pressure temperature test on the above samples, and the test results were all greater than 260°C, especially the ball pressure temperature of the sample in Example 1 reached 265°C. It can be seen from the above test results that by optimizing the composition, ratio, etc. of the key components such as the wear-resistant agent and nucleating agent of the PPS composite material, the tensile strength, impact strength and other mechanical properties of the composite material can be significantly improved. At the same time, the wear resistance can be significantly improved, and the Taber wear loss can be significantly reduced, so that the composite material can be widely used in more demanding environments. Moreover, the above optimization can also significantly improve the cooling crystallization temperature of the composite melt, so that the composite material can be cooled at a higher temperature during the processing process, effectively avoiding the imperfect cooling crystallization caused by the rapid cooling of the material in a short period of time, causing defects in the lattice of the material, so that the mechanical properties, thermal properties, wear resistance and other characteristics of the composite material are comprehensively improved.

[0102] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. The present invention is intended to cover any variation, use or adaptive change of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A wear-resistant and high-temperature resistant PPS composite material, characterized in that: It includes the following components in parts by weight: 32~52 parts by weight of PPS material; 3-15 parts by weight of anti-wear agent; 30-40 parts by weight of glass fiber; 0.5-2.0 parts by weight of lubricant; 0.3-0.5 parts by weight of antioxidant; 0.2~2.0 parts by weight of other additives; The PPS material includes high-crystallinity PPS, and the crystallinity of the high-crystallinity PPS is not less than 70%; The wear-resistant agent comprises a PTFE component and a metal sulfide, and the mass ratio is (1.5-2.5):1; the PTFE component is composed of a first PTFE component with an average particle size of 2-6 microns and a second PTFE component with an average particle size of 8-12 microns, and the mass ratio of the two is the same; The metal sulfide is composed of a single-phase metal sulfide and a multi-phase metal sulfide, with a mass ratio of (3.5-5):1; the single-phase metal sulfide is a compound formed by metal molybdenum and sulfur; the multi-phase metal sulfide is a new type of synthetic multi-phase sulfide based on molybdenum, tungsten and manganese; The other auxiliary agents include a nucleating agent, and the nucleating agent includes a sorbitol-based polyhydroxy small molecule compound and an aromatic carboxylic acid aluminum salt compound, and the mass ratio thereof is 1: (0.8-1.5); The glass fibers are unmodified chopped glass fibers and / or high-strength glass fibers.

2. The method for preparing the PPS composite material according to claim 1, characterized in that: It includes the following steps: Step 1: 32-52 parts by weight of dried PPS material, 3-15 parts by weight of anti-wear agent, 0.5-2.0 parts by weight of lubricant, 0.3-0.5 parts by weight of antioxidant, and 0.2-2.0 parts by weight of other additives are measured, and the above components are placed in a blender and stirred to mix uniformly to obtain a mixed material; Step 2: 30-40 parts by weight of glass fiber are measured and added into a twin-screw extruder together with the mixed material, and the mixture is heated, melted, extruded, and granulated to obtain the PPS composite material.

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