A high-wear-resistance polyetherimide composite material, a preparation method and application thereof

Abstract

This invention discloses a high-wear-resistant polyetherimide composite material, its preparation method, and its applications. The high-wear-resistant polyetherimide composite material comprises the following components by weight: 60-90 parts polyetherimide, 10-40 parts polyketimide, 1-5 parts antioxidant, 10-20 parts hollow glass microspheres, and 5-10 parts toughening agent. The high-wear-resistant polyetherimide composite material is prepared by compounding the two polymers and simultaneously adding wear-resistant additives. The composite material prepared by this invention achieves a Rockwell hardness of over 105 and possesses excellent mechanical properties, making it suitable for application in high-temperature and wear-resistant aerospace fields.

Description

Technical Field

[0001] This invention relates to the field of composite materials, and particularly to a high wear-resistant polyetherimide composite material and its preparation method, as well as the application of the high wear-resistant polyetherimide composite material in the aerospace wear-resistant field. Background Technology

[0002] Polyetherimide (PEI) is widely used in aerospace, automotive, electronics, and medical device industries due to its superior properties. Its strong dimensional stability and heat resistance make it ideal for manufacturing aircraft and rocket components in aerospace; for engine parts, transmission systems, and body structures in the automotive industry; for electronics due to its excellent insulation and abrasion resistance; and for medical devices, its biocompatibility and chemical resistance are used in the manufacture of artificial joints, dental materials, and other medical products.

[0003] Although polyetherimide has the characteristics of high strength, strong dimensional stability and high heat resistance, its poor wear resistance and high cost limit its further application in the aerospace wear-resistant field.

[0004] CN201811433242.4 discloses a wear-resistant polyetherimide composite material and its preparation method. The material is prepared by mixing and extruding the following components in parts by weight: 79-89 parts polyetherimide, 10-20 parts wear-resistant material, 0.1-0.3 parts antioxidant, and 0.1-0.5 parts lubricant. The wear-resistant material is a mixture of polytetrafluoroethylene (PTFE) and molybdenum disulfide powder. This patent utilizes the self-lubricating and high-temperature resistance of PTFE and the high-temperature friction-increasing effect of molybdenum disulfide to improve the wear resistance of the composite material, ultimately obtaining a wear-resistant polyetherimide product with excellent comprehensive performance and extending the material's service life. However, this method leads to a decrease in its mechanical properties and has a high cost.

[0005] CN201210499486.9 discloses a high-wear-resistant polyetherimide composite material, composed of the following materials by mass percentage: polyetherimide: 80-99%; polytetrafluoroethylene: 0.5-20%; lubricant: 0.5-2.5%. This invention also discloses a method for preparing the above composite material. This patent uses polytetrafluoroethylene to improve the frictional properties of polyetherimide, which can reduce the coefficient of friction of the composite material, reduce wear, and does not affect other physical and mechanical properties of the composite material. Furthermore, compared to friction materials such as graphite and molybdenum disulfide, polytetrafluoroethylene is white and can be easily dyed in other colors. However, by simply adding polytetrafluoroethylene, the compatibility of this patent is significantly compromised.

[0006] In summary, while existing polyetherimide composite materials can improve wear resistance by simply adding inorganic substances and polytetrafluoroethylene, this often comes at the cost of increased costs and decreased overall performance. Summary of the Invention

[0007] The purpose of this invention is to provide a high wear-resistant polyetherimide composite material, its preparation method, and its application.

[0008] The technical solution adopted in this invention is:

[0009] A high-abrasion-resistant polyetherimide composite material, comprising the following components in parts by weight:

[0010] 60-90 parts of polyetherimide

[0011] 10-40 parts of polyketimide

[0012] Antioxidant 1-5 parts,

[0013] 10-20 parts of hollow glass microspheres

[0014] 5-10 parts toughening agent.

[0015] Furthermore, the melt index of the polyetherimide is 5 to 30 g / 10 min.

[0016] Furthermore, the melt index of the polyketimide is 10–50 g / 10 min.

[0017] Furthermore, the antioxidant is selected from at least one of p-phenylenediamine, aniline, ethoxyquinoline, hydroquinone, and phenol.

[0018] Furthermore, the compressive strength of the hollow glass microspheres is 3000–18000 psi.

[0019] Furthermore, the toughening agent is an ethylene-acrylate copolymer with a molecular weight (Mw) of 30,000 to 100,000.

[0020] Furthermore, the ethylene-acrylate copolymer is an ethylene-methyl acrylate-butyl acrylate terpolymer, and its preparation method is as follows:

[0021] Acrylate was added to an aqueous solution of sodium dodecyl sulfate and stirred to obtain an emulsion. The emulsion was transferred to a reaction vessel replaced with ethylene, potassium persulfate initiator was added, the system pressure was adjusted to 1-5 MPa, the temperature was raised to 70-100℃, and the reaction was stirred for 2-4 hours. After the reaction was completed, the reaction solution was poured into a methanol solution containing hydroquinone for demulsification, filtered and dried to obtain the toughening agent.

[0022] The acrylate is at least one of methyl acrylate, ethyl acrylate, and butyl acrylate.

[0023] Furthermore, in the emulsion, the concentration of acrylate is 0–2 mol / L, and the concentration of sodium dodecyl sulfate is 0.01–0.2 mol / L; in the reaction system, the molar ratio of acrylate to potassium persulfate is 100–3000:1.

[0024] The preparation method of any of the above-mentioned high wear-resistant polyetherimide composite materials includes the following steps:

[0025] (1) Weigh the polyetherimide, polyketimide, antioxidant, hollow glass microspheres and toughening agent according to the proportion and add them to a high-speed mixer for stirring to obtain a mixture.

[0026] (2) The mixture is added to a screw extruder and then extruded, granulated and air-dried to obtain a high wear-resistant polyetherimide composite material.

[0027] Applications of any of the above-mentioned high wear-resistant polyetherimide composite materials in the aerospace field.

[0028] The beneficial effects of this invention are:

[0029] 1. This invention utilizes the high wear resistance of low-cost polyketimide to composite polyketimide and polyetherimide, adds vacuum glass microspheres to reduce weight, and uses a self-made toughening agent to toughen the material. The resulting high wear-resistant polyetherimide composite material has high strength, good dimensional stability, strong wear resistance, and low cost.

[0030] 2. The terpolymer toughening agent prepared by the present invention can improve the toughness and compatibility of the composite material without sacrificing its strength. Detailed Implementation

[0031] Unless otherwise specified, all raw materials used in the following examples and comparative examples are commercially available.

[0032] Example 1

[0033] A high-wear-resistant polyetherimide composite material A has the following formulation:

[0034] 80 parts of polyetherimide resin with a melt index of 6 g / 10 min;

[0035] 20 parts of polyketimide resin with a melt index of 5 g / 10 min;

[0036] 3 parts of p-phenylenediamine antioxidant;

[0037] 20 parts of hollow glass microspheres with a compressive strength of 3000 psi;

[0038] 10 parts of toughening agent (ethylene-methyl acrylate-ethyl acrylate copolymer) with Mw of 3w.

[0039] The preparation method of the above toughening agent is as follows:

[0040] (1) Weigh 2.9g sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g methyl acrylate and 60g ethyl acrylate monomer using an electronic balance, add them to a beaker, and stir at high speed for 5 minutes to obtain an emulsion;

[0041] (2) Transfer the above emulsion to a reactor that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 500:1; then adjust the system pressure to 3MPa, raise the temperature to 80℃, adjust the stirring speed to 100rpm, and react for 4h under these conditions; after the reaction is completed, pour the reaction solution into a methanol solution containing 1wt% hydroquinone, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0042] The preparation method of high wear-resistant polyetherimide composite material A is as follows:

[0043] The polyetherimide, polyketimide, antioxidant, hollow glass microspheres, and toughening agent were weighed according to the above proportions and added to a high-speed mixer for stirring and mixing. The mixed material was fed into the main feed port of a conical twin-screw extruder. After extrusion, granulation, and air drying, a high wear-resistant polyetherimide composite material was obtained. The basic properties are shown in Table 1.

[0044] Example 2

[0045] A high-wear-resistant polyetherimide composite material B has the following formulation:

[0046] 70 parts of polyetherimide resin with a melt index of 6 g / 10 min

[0047] 30 parts of polyketimide resin with a melt index of 5 g / 10 min

[0048] 3 parts aniline antioxidant

[0049] 20 parts of hollow glass microspheres with a compressive strength of 18,000 psi

[0050] 5 parts of toughening agent (ethylene-methyl acrylate-ethyl acrylate copolymer) with a strength of 10w.

[0051] The above-mentioned toughening agent preparation method includes the following steps:

[0052] (1) Weigh 2.9g of sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g of methyl acrylate and 60g of ethyl acrylate using an electronic balance, add them to a beaker, and stir at high speed for 5 minutes to obtain an emulsion.

[0053] (2) Transfer the emulsified solution to a reactor that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 500:1; then adjust the system pressure to 5MPa, raise the temperature to 80℃, adjust the stirring speed to 100rpm, and react for 4h under these conditions; after the reaction is completed, pour the reaction solution into a methanol solution containing 1wt% hydroquinone, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0054] The preparation method of high wear-resistant polyetherimide composite material B is as follows: polyetherimide, polyketimide, antioxidant, hollow glass microspheres and toughening agent are weighed according to the proportion and added to a high-speed mixer for stirring and mixing. The mixed material is added from the main feed port of the conical twin screw. After extrusion, granulation and air drying, high wear-resistant polyetherimide composite material is obtained. The basic properties are shown in Table 1.

[0055] Example 3

[0056] A high-wear-resistant polyetherimide composite material C has the following formulation:

[0057] 80 parts of polyetherimide resin with a melt index of 9 g / 10 min

[0058] 20 parts of polyketimide resin with a melt index of 5 g / 10 min

[0059] 3 parts hydroquinone antioxidant

[0060] 10 parts of hollow glass microspheres with a compressive strength of 5000 psi

[0061] 5 parts of toughening agent (ethylene-methyl acrylate-ethyl acrylate copolymer) with a strength of 8w.

[0062] The above-mentioned toughening agent preparation method includes the following steps:

[0063] (1) Weigh 2.9g of sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g of methyl acrylate and 60g of ethyl acrylate using an electronic balance, add them to a beaker, and stir at high speed for 5 minutes to obtain an emulsion.

[0064] (2) Transfer the emulsified solution to a reactor that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 500:1; then adjust the system pressure to 5MPa, raise the temperature to 80℃, adjust the stirring speed to 100rpm, and react for 4h under these conditions; after the reaction is completed, pour the reaction solution into a methanol solution containing 1wt% hydroquinone, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0065] The preparation method of high wear-resistant polyetherimide composite material C is as follows: polyetherimide, polyketimide, antioxidant, hollow glass microspheres, and toughening agent are weighed according to the proportion and added to a high-speed mixer for stirring and mixing. The mixed material is fed into the main feed port of a conical twin-screw extruder. After extrusion, granulation, and air drying, the high wear-resistant polyetherimide composite material is obtained. The basic properties are shown in Table 1.

[0066] Example 4

[0067] A high-wear-resistant polyetherimide composite material D has the following formulation:

[0068] 80 parts of polyetherimide resin with a melt index of 9 g / 10 min

[0069] 20 parts of polyketimide resin with a melt index of 5 g / 10 min

[0070] 3 parts of ethoxyquinoline antioxidant

[0071] 15 parts of hollow glass microspheres with a compressive strength of 3000 psi

[0072] 5 parts of toughening agent (ethylene-methyl acrylate-ethyl acrylate copolymer) with Mw of 3w

[0073] The above-mentioned toughening agent preparation method includes the following steps:

[0074] (1) Weigh 2.9g of sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g of methyl acrylate and 60g of ethyl acrylate using an electronic balance, add them to a beaker, and stir at high speed for 5 minutes to obtain an emulsion.

[0075] (2) Transfer the emulsified solution to a reactor that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 100:1; then adjust the system pressure to 5 MPa, raise the temperature to 80°C, adjust the stirring speed to 100 rpm, and react for 4 hours under these conditions; after the reaction is completed, pour the reaction solution into a 1 wt% hydroquinone methanol solution, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0076] The preparation method of high wear-resistant polyetherimide composite material D is as follows: polyetherimide, polyketimide, antioxidant, hollow glass microspheres, and toughening agent are weighed according to the proportion and added to a high-speed mixer for stirring and mixing. The mixed material is fed into the main feed port of a conical twin-screw extruder. After extrusion, granulation, and air drying, the high wear-resistant polyetherimide composite material is obtained. The basic properties are shown in Table 1.

[0077] Example 5

[0078] A high-wear-resistant polyetherimide composite material E has the following formulation:

[0079] 90 parts of polyetherimide resin with a melt index of 9 g / 10 min

[0080] 10 parts of polyketimide resin with a melt index of 5 g / 10 min

[0081] 3 parts of ethoxyquinoline antioxidant

[0082] 20 parts of hollow glass microspheres with a compressive strength of 3000 psi

[0083] 10 parts of toughening agent (ethylene-methyl acrylate-butyl acrylate copolymer) with Mw of 3w

[0084] The above-mentioned toughening agent preparation method includes the following steps:

[0085] (1) Weigh 2.9g sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g methyl acrylate and 76g butyl acrylate using an electronic balance, add them to a beaker, and stir at high speed for 5 minutes to obtain an emulsion.

[0086] (2) Transfer the emulsified solution to a reactor that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 500:1; then adjust the system pressure to 5MPa, raise the temperature to 80℃, adjust the stirring speed to 100rpm, and react for 4h under these conditions; after the reaction is completed, pour the reaction solution into a methanol solution containing 1wt% hydroquinone, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0087] The preparation method of high wear-resistant polyetherimide composite material E is as follows: polyetherimide, polyketimide, antioxidant, hollow glass microspheres and toughening agent are weighed according to the proportion and added to a high-speed mixer for stirring and mixing. The mixed material is added from the main feed port of a conical twin screw. After extrusion, granulation and air drying, high wear-resistant polyetherimide composite material is obtained. The basic properties are shown in Table 1.

[0088] Example 6

[0089] A high-wear-resistant polyetherimide composite material F has the following formulation:

[0090] 90 parts of polyetherimide resin with a melt index of 18 g / 10 min

[0091] 10 parts of polyketimide resin with a melt index of 5 g / 10 min

[0092] 3 parts of ethoxyquinoline antioxidant

[0093] 15 parts of hollow glass microspheres with a compressive strength of 3000 psi

[0094] 10 parts of toughening agent (ethylene-methyl acrylate-butyl acrylate copolymer) with Mw of 3w

[0095] The preparation method of the above toughening agent includes the following steps:

[0096] (1) Weigh 2.9g sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g methyl acrylate and 76g butyl acrylate using an electronic balance, add them to a beaker, and stir at high speed for 5 minutes to obtain an emulsion.

[0097] (2) Transfer the emulsified solution to a reaction vessel that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 500:1; then adjust the system pressure to 5MPa, raise the temperature to 80℃, adjust the stirring speed to 100rpm, and react for 4h under these conditions; after the reaction is completed, pour the reaction solution into a 1wt% hydroquinone methanol solution, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0098] The preparation method of high wear-resistant polyetherimide composite material F is as follows: polyetherimide, polyketimide, antioxidant, hollow glass microspheres, and toughening agent are weighed according to the proportion and added to a high-speed mixer for stirring and mixing. The mixed material is fed into the main feed port of a conical twin-screw extruder. After extrusion, granulation, and air drying, the high wear-resistant polyetherimide composite material is obtained. The basic properties are shown in Table 1.

[0099] Example 7

[0100] A high-wear-resistant polyetherimide composite material G has the following formulation:

[0101] 60 parts of polyetherimide resin with a melt index of 18 g / 10 min

[0102] 40 parts of polyketimide resin with a melt index of 5 g / 10 min

[0103] 3 parts of ethoxyquinoline antioxidant

[0104] 10 parts of hollow glass microspheres with a compressive strength of 3000 psi

[0105] 5 parts of toughening agent (ethylene-methyl acrylate-butyl acrylate copolymer) with Mw of 3w

[0106] The above-mentioned toughening agent preparation method includes the following steps:

[0107] (1) Weigh 2.9g sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g methyl acrylate and 76g butyl acrylate using an electronic balance, add them to a beaker, and stir at high speed for 5 minutes to obtain an emulsion.

[0108] (2) Transfer the emulsified solution to a reactor that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 3000:1; then adjust the system pressure to 5MPa, raise the temperature to 80℃, adjust the stirring speed to 100rpm, and react for 4h under these conditions; after the reaction is completed, pour the reaction solution into a 1wt% hydroquinone methanol solution, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0109] The preparation method of high wear-resistant polyetherimide composite material G is as follows: polyetherimide, polyketimide, antioxidant, hollow glass microspheres, and toughening agent are weighed according to the proportion and added to a high-speed mixer for stirring and mixing. The mixed material is fed into the main feed port of a conical twin-screw extruder. After extrusion, granulation, and air drying, the high wear-resistant polyetherimide composite material is obtained. The basic properties are shown in Table 1.

[0110] Example 8

[0111] A high-wear-resistant polyetherimide composite material H has the following formulation:

[0112] 60 parts of polyetherimide resin with a melt index of 18 g / 10 min

[0113] 40 parts of polyketimide resin with a melt index of 5 g / 10 min

[0114] 3 parts of p-phenylenediamine antioxidant

[0115] 10 parts of hollow glass microspheres with a compressive strength of 3000 psi

[0116] 10 parts of toughening agent (ethylene-methyl acrylate-butyl acrylate copolymer) with Mw of 3w

[0117] The above-mentioned toughening agent preparation method includes the following steps:

[0118] (1) Weigh 2.9g sodium dodecyl sulfate using an electronic balance, add it to a beaker and dissolve it in water, and stir at high speed for 5 minutes; weigh 51g methyl acrylate and 76g butyl acrylate using an electronic balance, add them to a beaker, and stir at high speed for 5-10 minutes to obtain an emulsion.

[0119] (2) Transfer the emulsified solution to a reaction vessel that has been evacuated and replaced with ethylene, add the weighed potassium persulfate initiator, and the molar ratio of acrylate to potassium persulfate is 500:1; then adjust the system pressure to 3MPa, raise the temperature to 80℃, adjust the stirring speed to 100rpm, and react for 4h under these conditions; after the reaction is completed, pour the reaction solution into a 1wt% hydroquinone methanol solution, stir, cool, and demulsify. When the content of precipitate in the solution no longer increases, filter, take the filter residue and let it stand and dry to obtain the toughening agent.

[0120] The preparation method of high wear-resistant polyetherimide composite material H is as follows: polyetherimide, polyketimide, antioxidant, hollow glass microspheres, and toughening agent are weighed according to the proportion and added to a high-speed mixer for stirring and mixing. The mixed material is fed into the main feed port of a conical twin-screw extruder. After extrusion, granulation, and air drying, the high wear-resistant polyetherimide composite material is obtained. The basic properties are shown in Table 1.

[0121] Comparative Example 1

[0122] A polyetherimide composite material has the following formulation:

[0123] 100 parts of polyetherimide resin with a melt index of 18 g / 10 min

[0124] 3 parts of ethoxyquinoline antioxidant

[0125] 10 parts of methyl methacrylate-butadiene-styrene (MBS) core-shell toughening agent

[0126] The preparation method of polyetherimide composite material includes the following steps: weighing polyetherimide, antioxidant and toughening agent according to the proportion and adding them to a high-speed mixer for stirring; adding the mixed material from the main feed port of a conical twin screw; and obtaining polyetherimide composite material after extrusion, granulation and air drying. The basic properties are shown in Table 1.

[0127] Table 1

[0128]

[0129] As can be seen from Table 1, the high wear-resistant polyetherimide composite material prepared by the present invention has significantly improved wear resistance compared with the prior art, and also has excellent tensile and impact properties.

Claims

1. A high wear resistant polyetherimide composite, characterized by: Includes the following components by weight, 60-90 parts of polyetherimide 10-40 parts of polyketimide Antioxidant 1-5 parts, 10-20 parts of hollow glass microspheres 5-10 parts toughening agent.

2. The high wear resistant polyetherimide composite of claim 1, wherein, The melt index of the polyetherimide is 5 to 30 g / 10 min.

3. The high wear-resistant polyetherimide composite material according to claim 1, characterized in that, The melt index of the polyketimide is 10–50 g / 10 min.

4. The high wear-resistant polyetherimide composite material according to claim 1, characterized in that, The antioxidant is selected from at least one of p-phenylenediamine, aniline, ethoxyquinoline, hydroquinone, and phenol.

5. The high wear-resistant polyetherimide composite material according to claim 1, characterized in that, The compressive strength of the hollow glass microspheres is 3000–18000 psi.

6. The high wear resistant polyetherimide composite of claim 1, wherein, The toughening agent is an ethylene-acrylate copolymer with a molecular weight (Mw) of 30,000 to 100,000.

7. The high wear resistant polyetherimide composite of claim 6, wherein, The ethylene-acrylate copolymer is an ethylene-methyl acrylate-butyl acrylate terpolymer, and its preparation method is as follows: Acrylate was added to an aqueous solution of sodium dodecyl sulfate and stirred to obtain an emulsion. The emulsion was transferred to a reaction vessel replaced with ethylene, potassium persulfate initiator was added, the system pressure was adjusted to 1-5 MPa, the temperature was raised to 70-100℃, and the reaction was stirred for 2-4 hours. After the reaction was completed, the reaction solution was poured into a methanol solution containing hydroquinone for demulsification, filtered and dried to obtain the toughening agent.

8. The high wear resistant polyetherimide composite of claim 7, wherein, In the emulsion, the concentration of acrylate is 0–2 mol / L and the concentration of sodium dodecyl sulfate is 0.01–0.2 mol / L; in the reaction system, the molar ratio of acrylate to potassium persulfate is 100–3000:

1.

9. Process for the production of the high wear resistant polyetherimide composite according to any one of claims 1 to 8, characterized in that, Includes the following steps: (1) Weigh the polyetherimide, polyketimide, antioxidant, hollow glass microspheres and toughening agent according to the proportion and add them to a high-speed mixer for stirring to obtain a mixture. (2) The mixture is added to a screw extruder and then extruded, granulated and air-dried to obtain a high wear-resistant polyetherimide composite material.

10. The application of the high abrasion-resistant polyetherimide composite material according to any one of claims 1 to 8 in the aerospace field.

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