Surface flame-retardant compatibilization glass fiber reinforced PPE / PS alloy material and preparation method thereof

Abstract

The invention belongs to the field of high polymer materials, and discloses a surface flame-retardant compatibilization glass fiber reinforced PPE / PS alloy material and a preparation method thereof, the alloy material comprises the following raw materials by weight: 10-84.98% of bulk flame-retardant MPPE resin; 5-35% of polystyrene resin; 10 to 40% of flame-retardant glass fiber; 0.01 to 10% of a flame retardant; 0.01 to 2% of a synergistic flame retardant; and 0-3% of other auxiliary agents. The prepared PPE / PS alloy material has excellent mechanical properties, processability and flame retardance, and can be used in the fields of household appliances, electric appliances, automobiles, optical fiber parts and the like.

Description

Technical Field

[0001] The invention relates to the field of polymer materials, and in particular to a surface flame-retardant and compatibilized glass fiber reinforced PPE / PS alloy material and a preparation method thereof. Background Art

[0002] Flame retardant PPE / PS composites are halogen-free, highly fluid, highly impact-resistant, and highly heat-resistant, with a good balance of mechanical and chemical properties, making them suitable for a variety of applications. Its well-balanced properties provide adjustable heat resistance, good hydrolytic stability, high dielectric strength, and optional non-halogenated flame retardants in a low specific gravity material. These properties make flame retardant PPE / PS composites an ideal material for use in a variety of specific applications, including electronic and electrical components, charger housings, automotive battery boxes, sockets, junction boxes, fuses, relay boxes, connectors, coil bobbins, switch relays, integrated circuit board brackets, and more. ‌ Flame retardant and expanded glass fiber is a material that improves the flame retardant and mechanical properties of glass fiber reinforced polymers by adding flame retardants and expanders. This material is usually used to improve the thermal stability and mechanical strength of polymer materials while maintaining the flame retardant properties of the materials to meet the needs of specific applications. Flame retardant and expanded glass fiber is used to prepare lightweight and thin-walled parts to replace steel, engineering plastics and other materials. This material has the advantages of low density, good heat and creep resistance, and high cost performance, which makes it occupy an important position in various industrial applications.

[0003] Chinese patent CN202310134159.1 provides a low-temperature resistant PPO / PS material suitable for energy batteries and its preparation method. The PPO / PS material has the advantages of low-temperature ball resistance and prevention of freezing drop cracking, high flame retardancy, and low density. It is applied to the plastic shell of the energy battery industry. It has excellent color change performance during water immersion charging and discharging, which enables it to replace the existing flame-retardant ABS and PC / ABS materials; it provides a new direction for the new application of recycled polystyrene resin, with good economic and environmental benefits. Chinese patent application number: CN202011522160.4 provides a flame-retardant high-rigidity PS / PPE composite material and its preparation method and application. The flame-retardant high-rigidity PS / PPE composite material provided adopts continuous long glass fiber and specific flame retardant synergist and flame retardant to synergize and enhance the effect, and regulates the glass fiber retention length D90, which greatly improves the flame retardancy of the material. The flame retardant grade can reach above 5VB under thinner thickness conditions; Chinese patent 202310236116.4 proposes a surface flame retardant and compatibilized glass fiber reinforced nylon composite material and a preparation method thereof, and an interfacial flame retardant compatibilizer is grafted to the surface of the glass fiber to prepare a surface flame retardant and compatibilized glass fiber; then the prepared surface flame retardant and compatibilized glass fiber is mixed with nylon, flame retardant and additives, and then extruded and granulated, and injection molded to obtain a flame retardant and compatibilized glass fiber reinforced nylon composite material. The preparation method of flame-retardant PPE / PS alloy in the currently disclosed patents is mainly achieved through physical blending, which usually requires a high amount of flame retardant to achieve flame retardant properties. Interfacial flame retardant volume expansion technology has been less studied in the preparation of flame retardant PPE / PS alloy materials. Interfacial flame retardant volume expansion technology can solve the technical problems of the "wick effect" brought by glass fiber and the poor flame retardancy and mechanical properties of PPE / PS alloy materials, which is of great significance for the preparation of high-performance PPE / PS alloy materials. Summary of the invention

[0004] The purpose of the present invention is to provide a surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material and a preparation method and application thereof. The PPE / PS alloy material is prepared by formula design, and the PPE / PS alloy material prepared by the method has both flame retardant properties and mechanical properties, and is used in the fields of home appliances, electrical appliances, automobiles, optical fiber components, etc.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A surface flame-retardant and compatibilized glass fiber reinforced PPE / PS alloy material is prepared according to the following raw materials in percentage by weight: The flame retardant MPPE resin of the body is 2-84.98%; Polystyrene resin 5-35%; Flame retardant glass fiber 10-40%; Modified flame retardant 0.01-10%; Synergistic flame retardant 0.01-2%; Additives 0-3%.

[0006] The bulk flame-retardant MPPE resin is obtained by functional modification of PPE resin. The weight average molecular weight of PPE resin is 20000-60000, and the melt flow rate (test conditions: 280°C, 5kg) is 0.5-30g / 10min. The functional modification of PPE is prepared in two steps: first, carboxyl modified PPE resin is prepared by reacting butyl lithium and carbon dioxide in anhydrous toluene solvent; secondly, carboxyl modified PPE resin is further reacted with epoxy phenyl phosphate to prepare bulk flame-retardant MPPE resin, the structural formula of which is as follows:

[0007] The polystyrene resin is selected from one or more of high impact polystyrene, general purpose polystyrene and SBS resin, with a density of 1.04-1.06 g / cm3, a refractive index of 1.5-1.7 and a weight average molecular weight of 50000-200000. High impact polystyrene HIPS is preferred.

[0008] The flame retardant glass fiber has an alkali content of less than 0.8% by mass, a volume density of 0.6-0.8g / cm3, a single fiber diameter of 7-13μm, a short cut length of 2-5mm, a moisture content of ≤0.05% by mass, and an epoxy phosphate solution is sprayed on the surface of the glass fiber for sizing treatment, and the mass fraction of the sizing agent is greater than 0.3%. The mass fraction of the flame retardant in the bio-based epoxy phosphate solution is 1%-10%, and part of the monomers of the epoxy phosphate are derived from biomass conversion, which is a bio-based material, and the structural formula is as follows:

[0009] The method for preparing the flame retardant glass fiber comprises the following steps: (1) soaking the glass fiber in a mixed solution consisting of a silane coupling agent and an aqueous solution of ethylene glycol, wherein the silane coupling agent is aminosilane, and the mass fraction of the silane coupling agent in the mixed solution is 15-25%, adjusting the pH of the solution, and performing a silane coupling agent modification treatment to obtain a silane coupling agent modified glass fiber; (2) The silane coupling agent modified glass fiber is immersed in an epoxy phosphate solution for modification, wherein the mass fraction of the bio-based epoxy phosphate is 0.7-1.5%, the solvent is selected from tetrahydrofuran, ether, acetone or butanone, the temperature is 50-100°C, the time is 10-20h, and after filtering, washing and drying, a flame retardant glass fiber is obtained.

[0010] The modified flame retardant is a halogen-free phosphorus-containing flame retardant, selected from one or more of triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, tricresyl phosphate, tris(2,4,6-trimethylphenyl) phosphate, tris(2,4-di-tert-butylphenyl) phosphate, tris(2,6-di-tert-butylphenyl) phosphate, resorcinol bis(diphenyl phosphate), hydroquinone bis(diphenyl phosphate), bisphenol A-bis(diphenyl phosphate), resorcinol bis(2,6-di-tert-butylphenyl phosphate) or hydroquinone bis(2,6-dimethylphenyl phosphate). Bisphenol A bis(diphenyl phosphate) is preferred.

[0011] The synergistic flame retardant is prepared by coating the surface of washed kaolin with epoxy phenyl phosphate; the epoxy phenyl phosphate coats the surface of the washed kaolin by chemical bonds; wherein the structural formula of the epoxy phenyl phosphate is as follows: .

[0012] The preparation method of the synergistic flame retardant comprises the following steps: (1) adding water-washed kaolin into deionized water and stirring with ultrasonic waves to obtain a water-washed kaolin dispersion; (2) dissolving epoxy phenyl phosphate in anhydrous ethanol to obtain an epoxy phenyl phosphate-ethanol solution, then adding the epoxy phenyl phosphate-ethanol solution to the water-washed kaolin dispersion under stirring conditions, heating to 50-80° C. to react for 0.5-4 h, and then cooling to room temperature to obtain a slurry; (3) Filter the white slurry to obtain a filter cake, wash and dry it to obtain the synergistic flame retardant.

[0013] The auxiliary agent may be one or more of an antioxidant, a lubricant, and a colorant.

[0014] The preparation method of the surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material comprises the following steps: (1) Weigh various dried raw materials according to the formula ratio; mix the flame retardant MPPE resin, polystyrene resin, modified flame retardant, synergistic flame retardant and other additives evenly with a high-speed mixer and set aside; weigh the flame retardant glass fiber according to the ratio and set aside; (2) The bulk flame retardant MPPE resin, polystyrene resin, modified flame retardant, synergistic flame retardant and auxiliary agent mixed raw materials are added through the main feeding port of the twin-screw extruder, and the flame retardant glass fiber is added from the side feeding port of the twin-screw extruder. The auxiliary agent mixed raw materials are added through the main feeding port of the twin-screw extruder, and the flame retardant glass fiber is added from the side feeding port of the twin-screw extruder. After the processes of melt extrusion, granulation, drying and the like, the PPE / PS alloy material is obtained.

[0015] The above-mentioned PPE / PS alloy materials can be used in the fields of home appliances, electrical appliances, automobiles, optical fiber components, etc.

[0016] The advantage of the present invention is that the prepared PPE / PS alloy material has excellent mechanical properties and flame retardant properties through formula design, and the interface flame retardant volume expansion technology is introduced in the formula design to solve the "candle wick effect" brought by glass fiber. At the same time, the end of the PPE resin is functionalized and modified with epoxy phenyl phosphate to prepare the bulk flame retardant PPE resin, and the epoxy phenyl phosphate is surface coated on the washed kaolin to prepare the synergistic flame retardant. Compared with simple physical blending, the compatibility and distribution uniformity of each component of the formula are increased, and the same flame retardant effect can be achieved. The amount of flame retardant added can be greatly reduced to obtain more excellent mechanical properties. In addition, the flame retardant part selected by the present invention is a bio-based source, which belongs to a halogen-free flame retardant, and the source of the flame retardant monomer and the environmental protection of the flame retardant when the flame retardant is heated or burned are more advantageous.

[0017] The beneficial effects of the present invention are: The PPE resin terminal of the invention is functionalized by epoxyphenyl phosphate, so that the MPPE has bulk flame retardant performance, and at the same time, the compatibility of the MPPE with flame retardant glass fiber and flame retardant is increased, thereby increasing the mechanical properties of the alloy material.

[0018] 2) The present invention introduces interfacial flame retardant and volume expansion technology in the formula design. The glass fiber surface is treated with epoxy phenyl phosphate to prepare flame retardant glass fiber. The epoxy phenyl phosphate loaded on the glass fiber surface can block the "wick effect" of the glass fiber during the combustion process, thereby increasing the flame retardant efficiency during the combustion process. In addition, the flame retardant is evenly dispersed in the resin along with the glass fiber, which improves the distribution of the glass fiber in the resin and the interfacial bonding force between the glass fiber and the resin. Compared with simple physical blending, the amount of flame retardant added can be greatly reduced to achieve the same flame retardant effect, and the prepared PPE / PS alloy has more excellent mechanical properties.

[0019] 3) The synergistic flame retardant is prepared by coating the surface of washed kaolin with epoxy phenyl phosphate, which can increase the compatibility of the synergistic flame retardant with the resin. The synergy of phenyl phosphate and kaolin further enhances the carbonization effect during the combustion process, and the flame retardant efficiency is effectively improved.

[0020] 4) Some of the monomers of epoxyphenyl phosphate are derived from bio-based materials and are halogen-free flame retardants. The flame retardant itself and the gas released when heated or burned are more environmentally friendly.

[0021] 5) This invention improves the performance of PPE / PS alloy materials from multiple dimensions such as raw material functional modification and formula design. The prepared PPE / PS alloy material can achieve excellent flame retardant effect with a small amount of flame retardant added, and obtains excellent mechanical properties, processing properties and flame retardant properties.

[0022] The above beneficial effects achieve excellent mechanical properties, processing properties and flame retardant properties of the PPE / PS alloy material. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and intentions to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The embodiments and comparative examples of the present invention use the following materials, but are not limited to the following materials: The main body is flame-retardant MPPE resin, homemade; HIPS, brand name HP825T, produced by Formosa Chemical Industry (Ningbo) Co., Ltd.; PPE, brand LXN040, produced by Nantong Xingchen Synthetic Materials Co., Ltd.; Flame retardant glass fiber, homemade; Glass fiber, brand ECS306HR, produced by Chongqing International Composite Materials Co., Ltd.; Flame retardant BDP, brand name WSFR-BDP, produced by Zhejiang Wansheng Co., Ltd.; Synergistic flame retardant, homemade; Washed kaolin, trade name HG90, produced by KaMin, USA; Processing aid, brand name LYSI-100E, produced by Chengdu Silike Technology Co., Ltd.; Antioxidant 1010, brand name YFK-1010, produced by Yingkou Fengguang New Materials Co., Ltd.; Antioxidant 9228, brand name DOVERPHOS S 9228, produced by Dover Chemical Corporation; Masterbatch, brand name XP6581A, produced by CABOT (USA); In the embodiment of the present invention, The bulk flame-retardant MPPE resin is obtained by functional modification of PPE resin. The weight average molecular weight of PPE resin is 20000-60000, and the melt flow rate (test conditions: 280°C, 5kg) is 0.5-30g / 10min. The functional modification of PPE is prepared in two steps: first, carboxyl modified PPE resin is prepared by reacting butyl lithium and carbon dioxide in anhydrous toluene solvent; secondly, carboxyl modified PPE resin is further reacted with epoxy phenyl phosphate to prepare bulk flame-retardant MPPE resin, the structural formula of which is as follows:

[0025] The method for preparing the flame retardant glass fiber comprises the following steps: (1) soaking the glass fiber in a mixed solution consisting of a silane coupling agent and an aqueous solution of ethylene glycol, wherein the silane coupling agent is aminosilane, and the mass fraction of the silane coupling agent in the mixed solution is 15-25%, adjusting the pH of the solution, and performing a silane coupling agent modification treatment to obtain a silane coupling agent modified glass fiber; (2) The silane coupling agent modified glass fiber is immersed in an epoxy phosphate solution for modification, wherein the mass fraction of the bio-based epoxy phosphate is 0.7-1.5%, the solvent is selected from tetrahydrofuran, ether, acetone or butanone, the temperature is 50-100°C, the time is 10-20h, and after filtering, washing and drying, a flame retardant glass fiber is obtained.

[0026] The preparation method of the synergistic flame retardant comprises the following steps: (1) adding water-washed kaolin into deionized water and stirring with ultrasonic waves to obtain a water-washed kaolin dispersion; (2) dissolving epoxy phenyl phosphate in anhydrous ethanol to obtain an epoxy phenyl phosphate-ethanol solution, then adding the epoxy phenyl phosphate-ethanol solution to the water-washed kaolin dispersion under stirring conditions, heating to 50-80° C. to react for 0.5-4 h, and then cooling to room temperature to obtain a slurry; (3) Filter the white slurry to obtain a filter cake, wash and dry it to obtain the synergistic flame retardant.

[0027] Preparation methods of Examples 1-6 and Comparative Examples 1-6: Preparation method of PPE / PS alloy material (1) Weigh various dried raw materials according to the formula ratio; mix the flame retardant MPPE resin, polystyrene resin, modified flame retardant, synergistic flame retardant and other additives evenly with a high-speed mixer and set aside; weigh the flame retardant glass fiber according to the ratio and set aside; (2) The flame retardant MPPE resin, polystyrene resin, modified flame retardant, synergistic flame retardant and auxiliary agent mixed raw materials are added through the main feeding port of the twin-screw extruder, and the flame retardant glass fiber is added from the side feeding port of the twin-screw extruder. After the processes of melt extrusion, granulation and drying, the PPE / PS alloy material is obtained.

[0028] Preparation of PPE / PS alloy material test specimens: The above materials were dried in a forced air drying oven at 120°C for 4 hours and then injection molded into standard specimens at an injection molding temperature of 280-330°C. The prepared mechanical properties specimens were conditioned in a standard laboratory environment (23°C, 50% RH) for 24 hours before testing.

[0029] Test methods for each performance index: Tensile properties: According to ISO 527 method, sample size: 170mm×10mm×4mm, test speed 5mm / min.

[0030] Bending properties: According to ISO 178 method, sample size: 80mm×10mm×4mm, test speed 2mm / min.

[0031] Notched impact performance: According to ISO 179 method, sample size: 80mm×10mm×4mm.

[0032] Heat deformation temperature: according to ISO 75 method, sample size: 80mm×10mm×4mm, test condition: 1.8MPa.

[0033] Flame retardant performance: According to UL94 method, sample size: 127mm×12.7mm×1.6mm.

[0034] Table 1: Composition and properties of PPE / PS alloy materials in Examples 1-6 and Comparative Examples 1-6

[0035] It can be seen from the results of the embodiments and comparative examples in Table 1 that the introduction of bulk flame-retardant PPE resin, flame-retardant glass fiber and synergistic flame retardant in the formula design can improve the flame retardant properties and mechanical properties of PPE / PS alloy materials. It can be seen from Example 4 and Comparative Examples 4-6 that the functionalization treatment of the PPE resin end by epoxy phenyl phosphate can effectively increase the flame retardant properties and mechanical properties of PPE / PS alloy materials, and at the same time, flame retardant glass fiber is more helpful than conventional glass fiber in improving flame retardant properties, and the amount of flame retardant added in the same flame retardant formula is small, because the epoxy phenyl phosphate loaded on the surface of the glass fiber can block the "candle wick effect" of the glass fiber during combustion, thereby increasing the flame retardant efficiency during combustion, and the improvement of compatibility given by the surface coating treatment of the glass fiber can increase the mechanical properties of the PPE / PS alloy material. It can be seen from Examples 1-4 and Comparative Examples 1-4 that the synergistic flame retardant can increase the compatibility of the synergistic flame retardant with the resin by coating with epoxy phenyl phosphate, and the synergy of phenyl phosphate and kaolin further enhances the carbonization effect during the combustion process, and the flame retardant efficiency is effectively improved. It can be seen from Examples 1, 5 and 6 that the technical advantages of the present invention are applicable to PPE / PS alloy materials of different grades. The PPE / PS alloy material prepared by the present invention has excellent mechanical properties, processing properties and flame retardant properties, and can be used in the fields of home appliances, electrical appliances, automobiles, optical fiber components, etc.

Claims

1. A surface flame retardant compatibilized glass fiber reinforced PPE / PS alloy material, characterized in that: Prepared according to the following raw materials in percentage by weight: The flame retardant MPPE resin of the main body is 10-84.98%; Polystyrene resin 5-35%; Flame retardant glass fiber 10-40%; Modified flame retardant 0.01-10%; Synergistic flame retardant 0.01-2%; Additives 0-3%; The bulk flame-retardant MPPE resin is obtained by functionally modifying a PPE resin, wherein the weight average molecular weight of the PPE resin is 20,000-60,000; the test conditions are: 280° C., 5 kg, and a melt flow rate of 0.5-30 g / 10 min; the functional modification of PPE is prepared in two steps: first, a carboxyl modified PPE resin is prepared by reacting butyl lithium and carbon dioxide in anhydrous toluene solvent; secondly, the carboxyl modified PPE resin is further reacted with epoxy phenyl phosphate to prepare a bulk flame-retardant MPPE resin; The method for preparing the flame retardant glass fiber comprises the following steps: (1) soaking the glass fiber in a mixed solution consisting of a silane coupling agent and an aqueous solution of ethylene glycol, wherein the silane coupling agent is aminosilane, and the mass fraction of the silane coupling agent in the mixed solution is 15-25%, adjusting the pH of the solution, and performing a silane coupling agent modification treatment to obtain a silane coupling agent modified glass fiber; (2) The silane coupling agent modified glass fiber is immersed in an epoxy phosphate solution for modification, wherein the mass fraction of the bio-based epoxy phosphate is 0.7-1.5%, the solvent is selected from tetrahydrofuran, ether, acetone or butanone, the temperature is 50-100°C, the time is 10-20h, and after filtering, washing and drying, a flame retardant glass fiber is obtained.

2. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 1, characterized in that: The polystyrene resin is selected from one or more of high impact polystyrene, general purpose polystyrene, and SBS resin, with a density of 1.04-1.06 g / cm 3 , refractive index: 1.5-1.7, weight average molecular mass: 50000-200000.

3. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 2, characterized in that: The polystyrene resin is selected from high impact polystyrene.

4. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 1, characterized in that: The alkali content of the flame retardant glass fiber is less than 0.8% by mass, and the volume density is 0.6-0.8g / cm 3 , monofilament fiber diameter: 7-13μm, short cut length: 2-5mm, moisture content by mass percentage ≤0.05%, the surface of the glass fiber is sizing treated by spraying a bio-based epoxy phosphate solution on the surface of the glass fiber, and the mass fraction of the sizing agent is greater than 0.3%.

5. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 4, characterized in that: The mass fraction of flame retardant in bio-based epoxy phosphate solution is 1%-10%. Some monomers of bio-based epoxy phosphate are derived from biomass conversion and are a kind of bio-based material. The structural formula is as follows: 。 6. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 1, characterized in that: The modified flame retardant is a halogen-free phosphorus-containing flame retardant, which is selected from one or more of triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, tricresyl phosphate, tris(2,4,6-trimethylphenyl) phosphate, tris(2,4-di-tert-butylphenyl) phosphate, tris(2,6-di-tert-butylphenyl) phosphate, resorcinol bis(diphenyl phosphate), hydroquinone bis(diphenyl phosphate), bisphenol A-bis(diphenyl phosphate), resorcinol bis(2,6-di-tert-butylphenyl phosphate) or hydroquinone bis(2,6-dimethylphenyl phosphate).

7. A surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 1, characterized in that: The modified flame retardant is bisphenol A bis(diphenyl phosphate).

8. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 1, characterized in that: The synergistic flame retardant is prepared by coating the surface of washed kaolin with epoxy phenyl phosphate; the epoxy phenyl phosphate coats the surface of the washed kaolin by chemical bonds; The structural formula of epoxyphenyl phosphate is as follows: 。 9. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 8, characterized in that: The preparation method of the synergistic flame retardant comprises the following steps: (1) adding water-washed kaolin into deionized water and stirring with ultrasonic waves to obtain a water-washed kaolin dispersion; (2) dissolving epoxy phenyl phosphate in anhydrous ethanol to obtain an epoxy phenyl phosphate-ethanol solution, then adding the epoxy phenyl phosphate-ethanol solution to the water-washed kaolin dispersion under stirring conditions, heating to 50-80° C. to react for 0.5-4 h, and then cooling to room temperature to obtain a slurry; (3) Filter the white slurry to obtain a filter cake, wash and dry it to obtain the synergistic flame retardant.

10. The surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to claim 1, characterized in that: The auxiliary agent may be one or more of an antioxidant, a lubricant, and a colorant.

11. The method for preparing the surface flame-retardant compatibilized glass fiber reinforced PPE / PS alloy material according to any one of claims 1 to 10, characterized in that: The following steps are involved: (1) Weigh various dried raw materials according to the formula ratio; mix the flame-retardant MPPE resin, polystyrene resin, flame retardant, synergistic flame retardant and additives evenly with a high-speed mixer and set aside; weigh the flame-retardant glass fiber according to the ratio and set aside; (2) The flame-retardant MPPE resin, polystyrene resin, modified flame retardant, synergistic flame retardant and auxiliary agent mixed raw materials are added through the main feeding port of the twin-screw extruder, and the flame-retardant glass fiber is added from the side feeding port of the twin-screw extruder. After the melt extrusion, granulation and drying process, the PPE / PS alloy material is obtained.

12. The surface flame retardant and compatibilized glass fiber reinforced PPE / PS alloy material according to any one of claims 1 to 10, characterized in that: The PPE / PS alloy material is used in the fields of household appliances, electrical appliances, automobiles, and optical fiber components.

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