High-performance polyphenylene sulfide composite material and preparation method thereof

Abstract

The invention relates to a high-performance polyphenylene sulfide composite material and a preparation method thereof. The high-performance polyphenylene sulfide composite material comprises the following raw materials in parts by weight: 30-60 parts of PPS resin; 0.5 to 5 parts of a lubricant; 0.1 to 5 parts of an antioxidant; 40 to 70 parts of glass fiber cloth; 1-15 parts of a toughening agent; 1-20 parts of an infiltration compatilizer; the infiltration compatilizer is one or a combination of more of a hot melt adhesive, PH01, epoxy 669E and S600. According to the high-performance polyphenylene sulfide composite material and the preparation method thereof, the wettability of the composite material is improved and the mechanical property of the composite material is improved by modifying the resin, innovating the formula and applying a proper mould pressing process, so that a thermoplastic composite material of which the performance is comparable to that of a thermosetting composite material can be obtained; the composite material can replace a thermosetting composite material to a great extent, and meets the national environmental protection requirement.

Description

Technical Field

[0001] The invention belongs to the technical field of polyphenylene sulfide composite materials, and in particular relates to a high-performance polyphenylene sulfide composite material and a preparation method thereof. Background Art

[0002] Polyphenylene sulfide (PPS) is a thermoplastic crystalline polymer with excellent comprehensive performance, good molding processability, corrosion resistance, flame retardancy, rigidity and modulus, high dimensional stability, excellent electrical properties, high fatigue strength, good creep resistance, easy molding, aging resistance, radiation resistance, non-toxicity, etc. It has a wide range of uses in the fields of electronics, automobiles, precision machinery, chemicals, home appliances, aviation, aerospace and national defense, and has developed into the world's sixth largest general engineering plastic in recent years.

[0003] There are very few thermoplastic composite materials on the market. Most of them are epoxy thermosetting composite materials. Thermosetting composite materials are not environmentally friendly. In addition, competing polyphenylene sulfide thermoplastic composite materials have disadvantages such as low performance, insufficient wettability, and limited application range.

[0004] Therefore, a high-performance polyphenylene sulfide composite material and its preparation method are developed. By modifying the resin, innovating the formula, and using a suitable molding process, the wettability of the composite material is improved and its mechanical properties are improved. A thermoplastic composite material with performance comparable to that of thermosetting composite materials can be obtained, which can replace thermosetting composite materials to a large extent and meet national environmental protection requirements, and is of practical significance. Summary of the invention

[0005] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a high-performance polyphenylene sulfide composite material and a preparation method thereof. The design is reasonable. By improving the formula and optimizing the process, the wettability of the composite material is improved, and its mechanical properties are improved. A thermoplastic composite material with performance comparable to that of a thermosetting composite material can be obtained, which can replace thermosetting composite materials to a large extent and has broad application prospects.

[0006] The objective of the present invention is achieved through the following technical solutions: A high-performance polyphenylene sulfide composite material comprises the following raw materials in parts by weight: 30~60 parts of PPS resin; Lubricant 0.5~5 parts; 0.1~5 parts of antioxidant; 40~70 parts of glass fiber cloth; 1~15 parts of toughening agent; 1-20 parts of a wetting compatibilizer; the wetting compatibilizer is one or a combination of hot melt adhesive, PH01, epoxy 669E, and S600.

[0007] The polyphenylene sulfide composite material of the present invention has a reasonable formula design, and the synergistic effect between the components optimizes the wettability and mechanical properties of the polyphenylene sulfide composite material. Among them, the PPS resin is a matrix material, which determines the basic rigidity and toughness of the composite material, the glass fiber cloth is used as a reinforcing material, and can significantly improve the tensile strength and modulus of the composite material. The addition of the impregnating compatibilizer significantly improves the interface bonding force between the resin and the glass fiber cloth, and improves the wettability. The addition of the toughening agent improves the toughness and impact resistance of the composite material. The addition of the lubricant improves the processing fluidity, which helps the resin to be evenly distributed on the surface of the glass fiber cloth. The antioxidant prevents the PPS resin from being oxidized in a high temperature environment, and prolongs the service life of the material.

[0008] Preferably, the impregnation compatibilizer is a hot melt adhesive.

[0009] Hot melt adhesive acts as a wetting compatibilizer, which makes the interface between the resin and the glass fiber cloth bond well and can effectively transfer stress, thereby improving the mechanical properties. At the same time, it can effectively promote the bonding of the resin and the glass fiber cloth during the hot pressing process and reduce the occurrence of delamination.

[0010] Furthermore, in the above-mentioned high-performance polyphenylene sulfide composite material, the lubricant is one or a combination of multiple of silicone powder, PTFE, TAF, and calcium stearate.

[0011] Preferably, the lubricant is calcium stearate.

[0012] Calcium stearate can make the components more easily dispersed during mixing and extrusion, thereby improving the processing properties of the composite material and further affecting its wettability and mechanical properties.

[0013] Furthermore, in the above-mentioned high-performance polyphenylene sulfide composite material, the antioxidant is one of dioctadecyl pentaerythritol diphosphite and bis(2,4-dicumylphenyl)pentaerythritol-diphosphite, or a combination of two thereof.

[0014] Preferably, the antioxidant is dioctadecyl pentaerythritol diphosphite.

[0015] Dioctadecyl pentaerythritol diphosphite can protect the molecular structure of PPS resin, making its performance more stable under high temperature and other environments, and help improve the mechanical properties of composite materials. Furthermore, in the above-mentioned high-performance polyphenylene sulfide composite material, the glass fiber cloth is one of 200g plain glass fiber cloth, 200g twill glass fiber cloth, 320g plain glass fiber cloth, 320g twill glass fiber cloth, 390g plain glass fiber cloth, and 390g twill glass fiber cloth.

[0016] Furthermore, in the above-mentioned high-performance polyphenylene sulfide composite material, the glass fiber cloth is 320g twill glass fiber cloth.

[0017] Furthermore, in the above-mentioned high-performance polyphenylene sulfide composite material, the toughening agent is one or a combination of multiple of AX8900, SEBS, and NBR.

[0018] Preferably, the toughening agent is AX8900.

[0019] Toughener AX8900 is an EMA terpolymer that can form a good interface bond between the matrix resin and the reinforcing fibers, enabling the composite material to better disperse stress when subjected to force, thereby improving its mechanical properties. The present invention also relates to a method for preparing the high-performance polyphenylene sulfide composite material, comprising the following steps: S1: Place the PPS resin in a dryer and dry for 2-4 hours; S2: After the dried PPS resin is cooled at room temperature for 0.5-2 hours, it is placed in a high-speed mixer, and a lubricant, an antioxidant, a toughening agent, and a wetting compatibilizer are added in sequence, and stirred for 10-20 minutes to obtain a mixture; S3: adding the mixed material into a twin-screw extruder, cooling the extruded material strips with water, and then cutting them into pellets with a pelletizer to obtain thermoplastic modified particles with a diameter of 0.5 mm to 1.5 mm; S4: placing the thermoplastic modified particles in a dryer and drying them for 2 to 4 hours; S5: Preheat the glass fiber cloth in a heater at a temperature of 295-305°C; S6: Evenly spread the dried thermoplastic modified particles on the surface of the preheated glass fiber cloth for 10 to 30 seconds to obtain a semi-impregnated thermoplastic composite material; the mass ratio of the thermoplastic modified particles to the glass fiber cloth is (0.5:1) to (2:1); S7: Lay the semi-impregnated thermoplastic composite material in the mold, cover the mold with an upper cover, and then perform hot pressing at a temperature of 280-320° C. for 5-30 min. Demold after cooling to obtain a polyphenylene sulfide composite material.

[0020] Preferably, the semi-impregnated thermoplastic composite material is laid in the mold, and the number of layers laid is 3 to 12.

[0021] Furthermore, in the method for preparing the high-performance polyphenylene sulfide composite material, in S1, the dryer is a blast dryer, the drying temperature is 120° C., and the drying time is 3 hours.

[0022] This step can remove moisture from the PPS resin to prevent it from generating bubbles during subsequent processing, which will affect the quality and performance of the composite material. The dried PPS resin can be better dispersed when mixed with other components, which is beneficial to improving the uniformity and mechanical properties of the composite material.

[0023] Furthermore, in the preparation method of the above-mentioned high-performance polyphenylene sulfide composite material, in S2, the dried PPS resin is cooled at room temperature for 1 hour and then put into a high-speed mixer, the speed is set to 300 r / min, and the stirring time is 16 minutes.

[0024] High-speed mixing can make the components fully mixed and uniform, ensuring that the components are evenly distributed in the composite material, thereby improving the performance stability of the composite material.

[0025] Furthermore, in the preparation method of the above-mentioned high-performance polyphenylene sulfide composite material, in S3, the mixed material is added to the main feeding bin of the twin-screw extruder, the main feeding frequency is set to 5~15Hz, the melt temperature of the twin-screw extruder is set to 220℃~310℃, the twin screw aspect ratio is 44:1, and the screw speed is 100~300r / min.

[0026] Preferably, in S3, the main feeding frequency is set to 10 Hz, the melt temperature of the twin-screw extruder is set to 295° C., and the screw speed is set to 250 r / min.

[0027] By optimizing the parameters of twin-screw extrusion, the mixed materials are melt-mixed under controllable temperature and shear conditions to ensure that the resin and the additives are fully mixed, and thermoplastic modified particles with consistent composition and enhanced performance are produced, providing a good foundation for the subsequent molding process.

[0028] Furthermore, in the method for preparing the high-performance polyphenylene sulfide composite material, in S4, the drying temperature is 120° C. and the drying time is 3 hours.

[0029] This step can remove moisture from the thermoplastic modified particles again, ensuring that no bubbles are generated during the subsequent hot pressing process, thereby ensuring the quality of the composite material.

[0030] Furthermore, in the method for preparing the high-performance polyphenylene sulfide composite material, in S5, the preheating temperature is 300°C.

[0031] Preheat the glass fiber cloth to a temperature higher than the melting point of the resin to promote the immediate and uniform adhesion of the thermoplastic modified particles to the fibers, improve the wetting effect, and reduce the voids or dry spots in the composite material. After 10 to 30 seconds, the thermoplastic modified particles will be slightly melted and bonded to the surface of the glass fiber cloth without falling off. The resin particles will be bonded to the glass fiber cloth without being completely melted, which is convenient for subsequent processing and molding steps.

[0032] Furthermore, in the method for preparing the high-performance polyphenylene sulfide composite material, in S6, the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0033] The mass ratio of thermoplastic modified particles to glass fiber cloth was set to 1:1 to ensure sufficient matrix material to wrap the reinforcement material while avoiding excessive resin resulting in decreased wettability.

[0034] Furthermore, in the method for preparing the high-performance polyphenylene sulfide composite material, in S7, the hot pressing temperature is 305° C. and the time is 10 min.

[0035] During the hot pressing process, high temperature and pressure can make the resin further melt and flow, fully infiltrate the glass fiber cloth, and at the same time make the structure of the composite material denser and improve its mechanical properties.

[0036] Compared with the prior art, the present invention has the following beneficial effects: (1) The high-performance polyphenylene sulfide composite material disclosed in the present invention has significantly improved mechanical properties such as tensile strength and tensile modulus of the polyphenylene sulfide composite material through resin modification and formulation innovation. Compared with some existing polyphenylene sulfide composite materials, it can withstand greater loads and has better rigidity and toughness. By adding a wetting compatibilizer and coordinating the molding process, the wettability between the resin and the glass fiber cloth is improved, reducing the occurrence of delamination. Good wettability enhances the interfacial bonding force of the polyphenylene sulfide composite material and improves its overall performance and reliability. The polyphenylene sulfide composite material is a thermoplastic composite material. Compared with thermosetting composite materials, thermoplastic composite materials are more environmentally friendly and recyclable during production and use, meeting the requirements of national environmental protection policies. Its performance is comparable to that of thermosetting composite materials and can replace thermosetting composite materials to a large extent. Thermosetting composite materials are difficult to recycle after molding, while the thermoplastic polyphenylene sulfide composite material has the characteristics of repeatable processing, reducing production costs and resource waste. (2) The preparation method of the high-performance polyphenylene sulfide composite material disclosed in the present invention has reasonable preparation steps. The controllable drying of PPS resin and thermoplastic modified particles can remove moisture and prevent defects such as voids or hydrolysis degradation during the processing process. The glass fiber cloth is preheated to a temperature higher than the melting point of the resin to promote the immediate and uniform adhesion of the thermoplastic modified particles to the fibers, improve the wetting effect, and reduce the voids or dry spots in the composite material. After 10 to 30 seconds, the thermoplastic modified particles are micro-melted and bonded to the surface of the glass fiber cloth without falling off. The PPS particles are bonded to the glass fiber cloth without being completely melted, which is convenient for subsequent processing and molding steps. During the molding process, a temperature of 280 to 320°C and a certain pressure are applied to ensure that the PPS is completely melted and impregnated into the glass fiber network, so as to produce a fully consolidated composite material with minimal defects and good fiber-matrix adhesion. The preparation method can be used for large-scale production and has good economic efficiency. DETAILED DESCRIPTION

[0037] The following is a clear and complete description of the technical solutions in the embodiments of the present invention by combining Example 1, Example 2, Example 3, Example 4, Comparative Example 1, and Comparative Example 2 with specific experimental data. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention. The main raw materials of Examples 1 to 3 and Comparative Examples 1 to 2: PPS resin (brand name 3514, Zhejiang Xinhecheng Special Materials Co., Ltd.), toughening agent (brand name AX8900, Arkema, France), calcium stearate (Lianyang Yingzheng New Materials Co., Ltd.), glass fiber cloth (320g plain glass fiber, Changzhou Ruishun New Materials Co., Ltd.); others are commercially available.

[0038] Examples 1-3 and Comparative Examples 1-2 provide a polyphenylene sulfide composite material and a preparation method.

[0039] Example 1 The polyphenylene sulfide composite material of Example 1 includes thermoplastic modified particles and glass fiber cloth, and the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0040] The thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of PPS resin, 1 part of lubricant calcium stearate, 0.5 parts of antioxidant dioctadecyl pentaerythritol diphosphite, 1 part of toughening agent AX8900, and 10 parts of impregnation compatibilizer hot melt adhesive.

[0041] The preparation of the polyphenylene sulfide composite material of Example 1 comprises the following steps: S1: Dry the PPS resin in a forced air dryer at 120°C for 3 hours; S2: After the dried PPS resin is cooled at room temperature for 1 hour, it is placed in a high-speed mixer, and lubricant, antioxidant, toughening agent, and wetting compatibilizer are added in sequence. The speed is set at 300 r / min and stirred for 16 minutes to obtain a mixture; S3: Add the mixed material into the main feeding bin of the twin-screw extruder, set the main feeding frequency to 10 Hz, set the melt temperature of the twin-screw extruder to 295°C, the twin-screw aspect ratio to 44:1, and the screw speed to 250 r / min. The material strips extruded from the twin-screw extruder are water-cooled and then pelletized with a pelletizer to obtain thermoplastic modified particles with a diameter of 0.5 mm to 1.5 mm; S4: drying the thermoplastic modified particles in a dryer at 120° C. for 3 h; S5: Cut the glass fiber cloth into 400mm*400mm and place it in a heater for preheating at a temperature of 300°C; S6: Evenly spread the dried thermoplastic modified particles on the surface of the preheated glass fiber cloth, wait for 10 to 30 seconds, and the thermoplastic modified particles are slightly melted and bonded to the surface of the glass fiber cloth without falling off, thereby obtaining a semi-impregnated thermoplastic composite material; S7: Lay the semi-impregnated thermoplastic composite material in the mold, cover the mold with an upper cover, and then perform hot pressing at a temperature of 305° C. for 10 min. Demold after cooling to obtain the polyphenylene sulfide composite material of Example 1.

[0042] Example 2 The polyphenylene sulfide composite material of Example 2 includes thermoplastic modified particles and glass fiber cloth, and the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0043] The thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of PPS resin, 1 part of lubricant calcium stearate, 0.5 parts of antioxidant dioctadecyl pentaerythritol diphosphite, 1 part of toughening agent NBR, and 10 parts of impregnation compatibilizer PH01.

[0044] The preparation method of the polyphenylene sulfide composite material of Example 2 is the same as that of Example 1.

[0045] Example 3 The polyphenylene sulfide composite material of Example 3 includes thermoplastic modified particles and glass fiber cloth, and the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0046] The thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of PPS resin, 1 part of lubricant calcium stearate, 0.5 parts of antioxidant dioctadecyl pentaerythritol diphosphite, 1 part of toughening agent AX8900, and 10 parts of impregnation compatibilizer epoxy 669E.

[0047] The preparation method of the polyphenylene sulfide composite material of Example 3 is the same as that of Example 1.

[0048] Example 4 The polyphenylene sulfide composite material of Example 4 includes thermoplastic modified particles and glass fiber cloth, and the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0049] The thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of PPS resin, 1 part of lubricant calcium stearate, 0.5 parts of antioxidant dioctadecyl pentaerythritol diphosphite, 1 part of toughening agent SEBS, and 10 parts of impregnation compatibilizer epoxy 669E.

[0050] The preparation method of the polyphenylene sulfide composite material of Example 4 is the same as that of Example 1.

[0051] Comparative Example 1 The polyphenylene sulfide composite material of Comparative Example 1 includes thermoplastic modified particles and glass fiber cloth, and the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0052] The thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of PPS resin, 1 part of lubricant calcium stearate, 0.5 parts of antioxidant dioctadecyl pentaerythritol diphosphite, 1 part of toughening agent AX8900, and 5 parts of impregnation compatibilizer hot melt adhesive. The preparation method of the polyphenylene sulfide composite material of Comparative Example 1 is the same as that of Example 1.

[0053] Comparative Example 2 The polyphenylene sulfide composite material of Comparative Example 2 includes thermoplastic modified particles and glass fiber cloth, and the mass ratio of the thermoplastic modified particles to the glass fiber cloth is 1:1.

[0054] The thermoplastic modified particles include the following raw materials in parts by weight: 95.5 parts of PPS resin, 1 part of lubricant calcium stearate, 0.5 parts of antioxidant dioctadecyl pentaerythritol diphosphite, 1 part of toughening agent AX8900, and 15 parts of impregnation compatibilizer hot melt adhesive. The preparation method of the polyphenylene sulfide composite material of Comparative Example 2 is the same as that of Example 1.

[0055] Effect verification The performance of the polyphenylene sulfide composite materials prepared in Examples 1 to 3 and Comparative Examples 1 to 2 was tested.

[0056] (1) Tensile properties: The polyphenylene sulfide composite materials prepared in Examples 1 to 3 and Comparative Examples 1 to 2 were cut into strips of 250 mm*25 mm and tested in accordance with ASTM D3039 to obtain the tensile strength and tensile modulus of the materials.

[0057] (2) Wetting performance: The broken specimens of the polyphenylene sulfide composite materials prepared in Examples 1 to 3 and Comparative Examples 1 to 2 were visually observed to see whether the glass fiber and the resin on the cross section were delaminated. If there was no delamination, it was excellent; if there was slight delamination, it was good; if there was a lot of delamination, it was fair; and if there was severe delamination, it was poor, so as to judge the resin impregnation. The measurement results are shown in Table 1.

[0058] Table 1 It can be seen from Table 1 that the polyphenylene sulfide composite material of Example 1 uses AX8900 as a toughening agent and hot melt adhesive as a wetting compatibilizer, has a tensile strength of 450 MPa, a tensile modulus of 27.2 GPa, and excellent wetting performance, indicating that the combination of AX8900 and hot melt adhesive significantly enhances the fiber-matrix adhesion and mechanical properties.

[0059] The polyphenylene sulfide composite material of Example 2 uses NBR as a toughening agent and PH01 as a wetting compatibilizer, has a tensile strength of 370 MPa, a tensile modulus of 24.2 GPa, and good wetting performance. NBR provides toughness and PH01 improves the wetting effect, but the combined effect is not as good as that in Example 1.

[0060] The polyphenylene sulfide composite material of Example 3 uses AX8900 as a toughening agent and epoxy 669E as a wetting compatibilizer, has a tensile strength of 320 MPa, a tensile modulus of 21.0 GPa, and good wetting performance. Epoxy 669E improves the wetting effect, but is not as good as the combination effect in Example 1.

[0061] The polyphenylene sulfide composite material of Example 4 uses SEBS as a toughening agent and epoxy 669E as a wetting compatibilizer. The tensile strength is relatively low, which is 295 MPa, the tensile modulus is 19.3 GPa, and the wetting performance is average. SEBS provides toughness, but due to its elastomeric properties, the stiffness may be reduced, and the wetting effect is not ideal.

[0062] The polyphenylene sulfide composite material of Comparative Example 1 uses a relatively low amount of hot melt adhesive as a wetting compatibilizer, has a tensile strength of 390 MPa, a tensile modulus of 25.3 GPa, and good wetting performance. Compared with Example 1, the reduced content of the wetting compatibilizer leads to a decrease in the wetting performance and mechanical properties.

[0063] The polyphenylene sulfide composite material of Comparative Example 2 uses a higher amount of hot melt adhesive as a wetting compatibilizer, has a tensile strength of 380 MPa, a tensile modulus of 26.1 GPa, good wetting performance, and good wetting performance. Compared with Example 1, the excess compatibilizer does not significantly improve the performance.

[0064] This shows that the performance of polyphenylene sulfide composites can be significantly improved by rationally selecting toughening agents and wetting compatibilizers in the formulation design.

[0065] In summary, the technical solution of the present invention solves the problems of insufficient wettability and low mechanical properties of traditional thermoplastic composite materials currently on the market. Combined with the molding process, high-performance thermoplastic composite products can be flexibly prepared. They have high strength and can largely replace metal products and thermosetting composite materials. They have lightweight characteristics and meet current environmental protection requirements.

[0066] The present invention has many specific application paths, and the above is only a preferred embodiment of the present invention. It should be pointed out that the above embodiments are only used to illustrate the present invention, and are not used to limit the protection scope of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several improvements can also be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A high-performance polyphenylene sulfide composite material, characterized in that: The invention comprises the following raw materials in parts by weight: 30~60 parts of PPS resin; Lubricant 0.5~5 parts; 0.1~5 parts of antioxidant; 40~70 parts of glass fiber cloth; 1~15 parts of toughening agent; 1-20 parts of a wetting compatibilizer; the wetting compatibilizer is one or a combination of hot melt adhesive, PH01, epoxy 669E, and S600.

2. The high-performance polyphenylene sulfide composite material according to claim 1, characterized in that: The lubricant is one or a combination of silicone powder, PTFE, TAF, and calcium stearate.

3. The high-performance polyphenylene sulfide composite material according to claim 1, characterized in that: The antioxidant is one of dioctadecyl pentaerythritol diphosphite and bis(2,4-dicumylphenyl)pentaerythritol-diphosphite or a combination of the two.

4. The high-performance polyphenylene sulfide composite material according to claim 1, characterized in that: The glass fiber cloth is one of 200g plain glass fiber cloth, 200g twill glass fiber cloth, 320g plain glass fiber cloth, 320g twill glass fiber cloth, 390g plain glass fiber cloth and 390g twill glass fiber cloth.

5. The high-performance polyphenylene sulfide composite material according to claim 4, characterized in that: The glass fiber cloth is 320g twill glass fiber cloth.

6. The high-performance polyphenylene sulfide composite material according to claim 1, characterized in that: The toughening agent is one or a combination of multiple of AX8900, SEBS and NBR.

7. The method for preparing a high-performance polyphenylene sulfide composite material according to any one of claims 1 to 6, characterized in that: The steps include: S1: Place the PPS resin in a dryer and dry for 2-4 hours; S2: After the dried PPS resin is cooled at room temperature for 0.5-2 hours, it is placed in a high-speed mixer, and a lubricant, an antioxidant, a toughening agent, and a wetting compatibilizer are added in sequence, and stirred for 10-20 minutes to obtain a mixture; S3: adding the mixed material into a twin-screw extruder, cooling the extruded material strips with water, and then cutting them into pellets with a pelletizer to obtain thermoplastic modified particles with a diameter of 0.5 mm to 1.5 mm; S4: placing the thermoplastic modified particles in a dryer and drying them for 2 to 4 hours; S5: Preheat the glass fiber cloth in a heater at a temperature of 295-305°C; S6: Evenly spread the dried thermoplastic modified particles on the surface of the preheated glass fiber cloth for 10 to 30 seconds to obtain a semi-impregnated thermoplastic composite material; the mass ratio of the thermoplastic modified particles to the glass fiber cloth is (0.5:1) to (2:1); S7: Lay the semi-impregnated thermoplastic composite material in the mold, cover the mold with an upper cover, and then perform hot pressing at a temperature of 280-320° C. for 5-30 min. Demold after cooling to obtain a polyphenylene sulfide composite material.

8. The method for preparing a high-performance polyphenylene sulfide composite material according to claim 7, characterized in that: In S1, the dryer is a blower dryer, the drying temperature is 120°C, and the drying time is 3 hours; in S2, the dried PPS resin is cooled at room temperature for 1 hour and then put into a high-speed mixer, the speed is set to 300r / min, and the stirring time is 16 minutes; in S4, the drying temperature is 120°C, and the drying time is 3 hours; in S5, the preheating temperature is 300°C; in S6, the mass ratio of thermoplastic modified particles to glass fiber cloth is 1:1; in S7, the hot pressing temperature is 305°C, and the time is 10 minutes.

9. The method for preparing a high-performance polyphenylene sulfide composite material according to claim 7, characterized in that: In S3, the mixed material is added into the main feeding bin of the twin-screw extruder, the main feeding frequency is set to 5-15 Hz, the melt temperature of the twin-screw extruder is set to 220° C.-310° C., the twin-screw aspect ratio is 44:1, and the screw speed is 100-300 r / min.

10. The method for preparing a high-performance polyphenylene sulfide composite material according to claim 9, characterized in that: In S3, the main feeding frequency is set to 10 Hz, the melt temperature of the twin-screw extruder is set to 295° C., and the screw speed is set to 250 r / min.

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