Polybutylene terephthalate / polyphenyl ether alloy material as well as preparation method and application thereof

Abstract

The invention relates to a polybutylene terephthalate / polyphenyl ether alloy material as well as a preparation method and application thereof. The polybutylene terephthalate / polyphenyl ether alloy material comprises the following components in parts by weight: 50-70 parts of polybutylene terephthalate; 20 to 40 parts of polyphenyl ether; 3.5 to 15 parts of a compatilizer; 5-10 parts of a low dielectric filler; the compatilizer comprises maleic anhydride grafted polyphenyl ether and glycidyl methacrylate grafted polyolefin elastomer. The alloy material prepared by the invention has the excellent properties of polyphenyl ether and polybutylene terephthalate, and the compatibility between polybutylene terephthalate and polyphenyl ether is improved by a compatilizer compound system of maleic anhydride grafted polyphenyl ether and glycidyl methacrylate grafted polyolefin elastomer; the toughness, the tensile strength and the processing fluidity of the alloy material are improved, and the alloy material with excellent dielectric property and mechanical property is obtained by matching with the low-dielectric filler.

Description

Technical Field

[0001] This invention relates to the field of alloy materials technology, and in particular to a polybutylene terephthalate / polyphenylene ether alloy material, its preparation method, and its application. Background Technology

[0002] Polyphenylene oxide (PPO), one of the five major engineering plastics, has become one of the most consumed raw materials in the photovoltaic industry due to its characteristics such as high rigidity, high heat resistance, high strength, excellent electrical properties, wear resistance, non-toxicity and pollution resistance. However, it has poor melt flow, high processing temperature (>300℃), poor impact toughness, high melt viscosity and poor processability, making it difficult to directly mold through conventional injection molding processes. It is usually modified by alloying.

[0003] Polybutylene terephthalate (PBT) is widely used in electronics, automotive parts, and other fields due to its excellent mechanical strength, chemical resistance, and rapid prototyping characteristics. However, PBT has low notched impact toughness (typically <6 kJ / m²) and is prone to dimensional shrinkage in humid and hot environments, which limits its application in precision structural parts.

[0004] However, polybutylene terephthalate / polyphenylene ether alloy materials have poor compatibility because polybutylene terephthalate is a crystalline polymer and polyphenylene ether is an amorphous polymer.

[0005] CN101759964A discloses a polybutylene terephthalate / polyphenylene ether composite material and its preparation method. This solution provides a technical solution for preparing a compatibilizer containing glycidyl methacrylate-polystyrene copolymer and improving the compatibility of polybutylene terephthalate-polyphenylene ether with the compatibilizer. However, the composite material has insufficient strength and toughness, and its dielectric properties are not described, which cannot meet the stringent requirements of high-frequency electronic devices for the comprehensive performance of alloy materials.

[0006] CN109575528A discloses a low-dielectric- and high-toughness reinforced polybutylene terephthalate / polyphenylene ether composition and its preparation method. It discloses a compatibilizer system suitable for polybutylene terephthalate / polyphenylene ether compositions and adds PTFE with a low dielectric constant to obtain an alloy with excellent dielectric and mechanical properties. However, this material still has the problems of poor notch toughness and insufficient dielectric properties.

[0007] Therefore, there is an urgent need to develop a polybutylene terephthalate / polyphenylene ether alloy material that combines excellent toughness and dielectric properties to meet the stringent requirements for the comprehensive performance of alloy materials in various fields. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides a polybutylene terephthalate (PBTB) / polyphenylene ether (PPE) alloy material, its preparation method, and its applications. The obtained PBTB / PPE alloy material possesses the excellent properties of both polyphenylene ether (PPE) and PBTB. Furthermore, the compatibilizer system composed of maleic anhydride-grafted PPE and glycidyl methacrylate-grafted polyolefin elastomer improves the compatibility between PBTB and PPE, enhancing the toughness of the alloy material. With the addition of low-dielectric fillers, an alloy material with excellent dielectric and mechanical properties is obtained.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] In a first aspect, the present invention provides a polybutylene terephthalate / polyphenylene ether alloy material, wherein the polybutylene terephthalate / polyphenylene ether alloy material comprises the following components by weight:

[0011] 50-70 parts of polybutylene terephthalate;

[0012] 20-40 parts of polyphenylene ether;

[0013] Compatibilizer 3.5-15 parts;

[0014] 5-10 parts of low dielectric filler;

[0015] The compatibilizer comprises maleic anhydride-grafted polyphenylene ether and glycidyl methacrylate-grafted polyolefin elastomer.

[0016] The composition includes: 50-70 parts of polybutylene terephthalate (PET), for example, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, or 70 parts; 20-40 parts of polyphenylene ether (PPE), for example, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, or 40 parts; 3.5-15 parts of compatibilizer, for example, 3.5, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 parts; and 5-10 parts of low-dielectric filler, for example, 5, 6, 7, 8, 9, or 10 parts.

[0017] This invention employs a compatibilizer system composed of maleic anhydride-grafted polyphenylene ether (PPO-g-MAH) and glycidyl methacrylate-grafted polyolefin elastomer (POE-g-GMA). The maleic anhydride (MAH) groups in PPO-g-MAH can undergo esterification / amidation reactions with the terminal hydroxyl groups (-OH) or terminal carboxyl groups (-COOH) in polybutylene terephthalate (PET) to form a PPO-g-PBT graft copolymer. This establishes chemical bonds at the interface between PET and PET, reducing interfacial energy and inhibiting phase separation. Similarly, the epoxy groups (-CH(O)CH2) in POE-g-GMA can also undergo esterification / amidation reactions with the terminal hydroxyl groups (-OH) or terminal carboxyl groups (-COOH) in PET to form a POE-g-PBT copolymer, further enhancing interfacial bonding. Furthermore, the combined action of MAH and GMA forms a "dual-reaction-site" cross-linking network, enabling a more stable chemical bridge at the phase interface of polyphenylene ether and polybutylene terephthalate, significantly improving compatibility. In addition to improving the compatibility of the alloy, this system also enhances the toughness and tensile strength of the alloy material, improves the processing fluidity of the material, and reduces the dielectric loss of the material.

[0018] Preferably, the mass ratio of polybutylene terephthalate to polyphenylene ether is (1.5-2.5):1, for example, it can be 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1, 2:1, 2.1:1, 2.2:1, 2.3:1, 2.4:1 or 2.5:1, etc.

[0019] The preferred embodiment of the present invention further limits the mass ratio of polybutylene terephthalate to polyphenylene ether to be (1.5-2.5). If the polyphenylene ether content is too low, the toughness of the polybutylene terephthalate / polyphenylene ether alloy material will decrease and the dielectric loss will increase. If the polybutylene terephthalate content is too low, the processing fluidity of the polybutylene terephthalate / polyphenylene ether alloy material will be poor and the tensile strength will be insufficient.

[0020] Preferably, the mass ratio of maleic anhydride-grafted polyphenylene ether to glycidyl methacrylate-grafted polyolefin elastomer is (0.5-2):1, for example, it can be 0.5:1, 0.6:1, 0.7:1, 0.8:1, 0.9:1, 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1 or 2:1, etc.

[0021] The preferred embodiment of the present invention further specifies that the mass ratio of maleic anhydride-grafted polyphenylene ether and glycidyl methacrylate-grafted polyolefin elastomer is (0.5-2):1. If the content of maleic anhydride-grafted polyphenylene ether is too low, the mechanical properties of the alloy material will be reduced. If the content of glycidyl methacrylate-grafted polyolefin elastomer is too low, the improvement in fluidity will be limited.

[0022] Preferably, the grafting rate of the maleic anhydride-grafted polyphenylene ether is 0.5-2 wt%, for example, it can be 0.5 wt%, 1 wt%, 1.5 wt%, or 2 wt%.

[0023] Preferably, the grafting rate of the glycidyl methacrylate-grafted polyolefin elastomer is 1-3 wt%, for example, it can be 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, or 3 wt%.

[0024] Preferably, the low dielectric filler comprises any one or a combination of at least two of polytetrafluoroethylene, boron nitride, hollow glass microspheres, or silica.

[0025] Preferably, the polybutylene terephthalate / polyphenylene ether alloy material further includes any one or a combination of at least two of the following: toughening agent, antioxidant, or colorant.

[0026] Preferably, the polybutylene terephthalate / polyphenylene ether alloy material includes 3-8 parts of toughening agent by weight, for example, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts or 8 parts, etc.

[0027] Preferably, the polybutylene terephthalate / polyphenylene ether alloy material includes 1-2 parts of antioxidant by weight, for example, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts or 2 parts, etc.

[0028] Preferably, the polybutylene terephthalate / polyphenylene ether alloy material includes 1-2 parts of color powder by weight, for example, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts or 2 parts, etc.

[0029] Preferably, the toughening agent comprises a methyl methacrylate-butadiene-styrene terpolymer.

[0030] Preferably, the antioxidant includes any one or a combination of at least two of hindered phenolic antioxidants, phosphite antioxidants, or thioester antioxidants.

[0031] Preferably, the pigment includes carbon black.

[0032] In a second aspect, the present invention provides a method for preparing a polybutylene terephthalate / polyphenylene ether alloy material as described in the first aspect, wherein the components of the polybutylene terephthalate / polyphenylene ether alloy material are mixed in proportions by weight, and then melt-granulated to obtain the polybutylene terephthalate / polyphenylene ether alloy material.

[0033] Preferably, the mixing time is 10-20 min, for example, it can be 10 min, 12 min, 14 min, 16 min, 18 min or 20 min, etc.

[0034] Preferably, the melt granulation is carried out in a twin-screw extruder.

[0035] Preferably, the temperatures of each zone of the twin-screw extruder are as follows: Zone 1: 135-145℃; Zone 2: 245-255℃; Zone 3: 255-265℃; Zone 4: 275-285℃; Zone 5: 270-280℃; Zone 6: 255-265℃; Zone 7: 245-255℃; Zone 8: 245-255℃; Zone 9: 245-255℃; and Zone 10: 255-265℃.

[0036] Among them, "135-145℃" can be, for example, 135℃, 136℃, 137℃, 138℃, 139℃, 140℃, 141℃, 142℃, 143℃, 144℃, or 145℃, etc.; "245-255℃" can be, for example, 245℃, 246℃, 247℃, 248℃, 249℃, 250℃, 251℃, 252℃, 253℃, 254℃, or 255℃, etc.; "255-265℃" can be, for example, 255℃, 256℃, 257℃, or 258℃, etc. 259℃, 260℃, 261℃, 262℃, 263℃, 264℃, or 265℃, etc.; "275-285℃" can be, for example, 275℃, 276℃, 277℃, 278℃, 279℃, 280℃, 281℃, 282℃, 283℃, 284℃, or 285℃, etc.; "270-280℃" can be, for example, 270℃, 271℃, 272℃, 273℃, 274℃, 275℃, 276℃, 277℃, 278℃, 279℃, or 280℃, etc.

[0037] Preferably, the screw speed of the twin-screw extruder is 500-700 r / min, for example, it can be 500 r / min, 520 r / min, 550 r / min, 570 r / min, 600 r / min, 620 r / min, 650 r / min, 670 r / min or 700 r / min, etc.

[0038] Preferably, the residence time of the mixture in the twin-screw extruder is 2-4 min, for example, it can be 2 min, 2.5 min, 3 min, 3.5 min or 4 min.

[0039] Preferably, the melt granulation further includes cooling, drying, and pelletizing steps.

[0040] Thirdly, the present invention provides an application of the polybutylene terephthalate / polyphenylene ether alloy material as described in the first aspect in industrial machinery parts, automotive parts, electronic device housings and internal components, and medical devices.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects:

[0042] (1) The polybutylene terephthalate / polyphenylene ether alloy material provided by the present invention has the excellent properties of both polyphenylene ether and polybutylene terephthalate. The compatibilizer system composed of maleic anhydride-grafted polyphenylene ether and glycidyl methacrylate-grafted polyolefin elastomer improves the compatibility between polybutylene terephthalate and polyphenylene ether, and improves the toughness of the alloy material. With the addition of low dielectric filler, an alloy material with excellent dielectric and mechanical properties is obtained.

[0043] (2) Specifically, the polybutylene terephthalate / polyphenylene ether alloy material provided by the present invention has a tensile strength of up to 39-45 MPa, a notched impact strength of up to 7.8-12.2 kJ / m², a dielectric constant as low as 2.15-2.78 / 1GHz, a dielectric strength of up to 20-38 kV / mm, and a melt flow index of up to 15-47 g / 10min. Detailed Implementation

[0044] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.

[0045] The specific information of the materials used in the following specific embodiments of the present invention is as follows:

[0046] 1. Polybutylene terephthalate, brand name PBT-1200211M, Changchun Petrochemical Co., Ltd.;

[0047] 2. Polyphenylene oxide, LXN040, purchased from Nantong Xingchen Company;

[0048] 3. Maleic anhydride-grafted polyphenylene ether, grade PPO-g-MAH, grafting rate 1-1.2%, Chengjie Plastic Raw Materials Co., Ltd.;

[0049] 4. Glycidyl methacrylate grafted polyolefin elastomer, WANEXEL GMA-g-POE, grafting rate 1-3 wt%, purchased from Wanhua Chemical;

[0050] 5. Polytetrafluoroethylene (PTFE) FM-18, Daikin Industries;

[0051] 6. Methyl methacrylate-butadiene-styrene terpolymer, C-201A, Mitsubishi Rayon;

[0052] 7. Glycidyl methacrylate grafted polyethylene, Amplify™ TY 1053, grafting rate 0.8-1.5 wt%, Dow Chemical;

[0053] 8. Glycidyl methacrylate grafted polypropylene, QF551, grafting rate 0.8-1.2 wt%;

[0054] 9. Maleic anhydride-grafted polyolefin elastomer, Amplify™ TY 1052, grafting rate 0.8-1.2 wt%.

[0055] Examples 1-12

[0056] Examples 1-12 provide a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method, respectively. The composition is shown in Tables 1-2 (the amount of each component in Tables 1-2 is by weight), where "--" indicates that the component was not added.

[0057] The preparation method of the polybutylene terephthalate / polyphenylene ether alloy material is as follows: polyphenylene ether, glycidyl methacrylate-grafted polyolefin elastomer, maleic anhydride-grafted polyphenylene ether, polytetrafluoroethylene, silica, methyl methacrylate-butadiene-styrene terpolymer and antioxidant 1010 are mixed for 15 min. The mixed material is then fed into a twin-screw extruder through the main feed port. Polybutylene terephthalate is fed into the twin-screw extruder through the fifth-zone side feed port and mixed with the above material. The mixture is then extruded through the twin-screw extruder, cooled, dried and pelletized to obtain the polybutylene terephthalate / polyphenylene ether alloy. The temperatures of each zone of the twin-screw extruder are as follows: Zone 1: 140℃, Zone 2: 250℃, Zone 3: 260℃, Zone 4: 280℃, Zone 5: 275℃, Zone 6: 260℃, Zone 7: 250℃, Zone 8: 250℃, Zone 9: 255℃, and Zone 10: 260℃. The screw speed is 600 r / min, and the residence time of the material in the twin-screw extruder is 3 min.

[0058] Table 1

[0059]

[0060] Table 2

[0061]

[0062] Comparative Example 1

[0063] This comparative example provides a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method.

[0064] The difference from Example 1 is that, in this comparative example, glycidyl methacrylate-grafted polyolefin elastomer is not added, and the amount of maleic anhydride-grafted polyphenylene ether added is 12 parts.

[0065] Comparative Example 2

[0066] This comparative example provides a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method.

[0067] The difference from Example 1 is that, in this comparative example, maleic anhydride-grafted polyphenylene ether is not added, and the amount of glycidyl methacrylate-grafted polyolefin elastomer added is 12 parts.

[0068] Comparative Example 3

[0069] This comparative example provides a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method.

[0070] The difference from Example 1 is that, in this comparative example, glycidyl methacrylate-grafted polyolefin elastomer is replaced in equal amounts with glycidyl methacrylate-grafted polypropylene.

[0071] Comparative Example 4

[0072] This comparative example provides a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method.

[0073] The difference from Example 1 is that, in this comparative example, glycidyl methacrylate-grafted polyolefin elastomer is replaced by an equal amount of glycidyl methacrylate-grafted polyethylene.

[0074] Comparative Example 5

[0075] This comparative example provides a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method.

[0076] The difference from Example 1 is that, in this comparative example, maleic anhydride-grafted polyphenylene ether is replaced in equal amounts with maleic anhydride-grafted polyolefin elastomer.

[0077] Comparative Example 6

[0078] This comparative example provides a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method.

[0079] The difference from Example 1 is that in this comparative example, the amount of polytetrafluoroethylene added is 6 parts and the amount of silica added is 6 parts.

[0080] Comparative Example 7

[0081] This comparative example provides a polybutylene terephthalate / polyphenylene ether alloy material and its preparation method.

[0082] The difference from Example 1 is that in this comparative example, the amount of polytetrafluoroethylene added is 2 parts and the amount of silica added is 2 parts.

[0083] Test methods

[0084] Tensile strength (MPa): Tested according to ISO 527-2 for polybutylene terephthalate / polyphenylene ether alloy materials;

[0085] Notched impact strength (kJ / m²): Tested on polybutylene terephthalate / polyphenylene ether alloy materials according to ISO 179;

[0086] Dielectric constant ( / 1GHz): The polybutylene terephthalate / polyphenylene ether alloy material was tested according to GB / T 1409-2006;

[0087] Dielectric strength (kV / mm): Tested according to IEC 60243 for polybutylene terephthalate / polyphenylene ether alloy materials;

[0088] Melt flow index (g / 10min): Tested for polybutylene terephthalate / polyphenylene ether alloy materials according to ASTM D1238;

[0089] Grafting rate: The grafting rate of maleic anhydride-grafted polyphenylene ether and maleic anhydride-grafted polyolefin elastomer were both tested using acid-base titration.

[0090] The grafting rates of glycidyl methacrylate-grafted polyolefin elastomers, glycidyl methacrylate-grafted polyethylene, and glycidyl methacrylate-grafted polypropylene were all tested using the epoxy value titration method.

[0091] Test Results

[0092] The polybutylene terephthalate / polyphenylene ether alloy materials provided in Examples 1-12 and Comparative Examples 1-7 were tested, and the test results are shown in Table 3 below:

[0093] Table 3

[0094]

[0095] The test results show that:

[0096] (1) As can be seen from Examples 1 to 12, the polybutylene terephthalate / polyphenylene ether alloy material provided by the present invention has a tensile strength of up to 39-45 MPa, a notched impact strength of up to 7.8-12.2 kJ / m², a dielectric constant as low as 2.15-2.78 / 1GHz, a dielectric strength of up to 20-38 kV / mm, and a melt flow index of up to 15-47 g / 10min, and has excellent mechanical properties, electrical properties and processing properties.

[0097] (2) As can be seen from Examples 1 and 8, even without the addition of toughening agents, although the tensile strength and melt flow index decrease slightly, the polybutylene terephthalate / polyphenylene ether alloy material obtained by the present invention still has excellent mechanical properties, electrical properties and processing properties.

[0098] (5) As can be seen from Examples 1 to 9-10, the present invention can achieve better toughening effect by further limiting the mass ratio of maleic anhydride-grafted polyphenylene ether and glycidyl methacrylate-grafted polyolefin elastomer.

[0099] (6) As can be seen from Examples 1 to 11-12, the combination of polytetrafluoroethylene and silica low dielectric filler is more conducive to improving the electrical properties of alloy materials.

[0100] (7) As can be seen from Example 1 and Comparative Examples 1-5, the present invention improves the compatibility between polybutylene terephthalate and polyphenylene ether by using a compatibilizer system composed of maleic anhydride-grafted polyphenylene ether and glycidyl methacrylate-grafted polyolefin elastomer, thereby improving the toughness of the alloy material. However, when any compatibilizer component is missing or replaced, the toughening effect and the technical effect of the material dielectric properties are poor.

[0101] (8) As can be seen from Example 1 and Comparative Examples 6-7, when the amount of low dielectric filler added is too small, the dielectric properties of the alloy material will not meet the standard. When the amount of low dielectric filler added is too large, the filler is prone to agglomeration, which will lead to a significant decrease in the mechanical properties of the alloy material.

[0102] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A polybutylene terephthalate / polyphenylene ether alloy material, characterized in that, The polybutylene terephthalate / polyphenylene ether alloy material comprises the following components by weight: 50-70 parts of polybutylene terephthalate; 20-40 parts of polyphenylene ether; Compatibilizer 3.5-15 parts; 5-10 parts of low dielectric filler; The compatibilizer comprises maleic anhydride-grafted polyphenylene ether and glycidyl methacrylate-grafted polyolefin elastomer.

2. The polybutylene terephthalate / polyphenylene ether alloy material according to claim 1, characterized in that, The mass ratio of polybutylene terephthalate to polyphenylene ether is (1.5-2.5):

1.

3. The polybutylene terephthalate / polyphenylene ether alloy material according to claim 1 or 2, characterized in that, The mass ratio of the maleic anhydride-grafted polyphenylene ether and the glycidyl methacrylate-grafted polyolefin elastomer is (0.5-2):

1. Preferably, the grafting rate of the maleic anhydride-grafted polyphenylene ether is 0.5-2 wt%; Preferably, the grafting rate of the glycidyl methacrylate-grafted polyolefin elastomer is 1-3 wt%.

4. The polybutylene terephthalate / polyphenylene ether alloy material according to any one of claims 1-3, characterized in that, The low dielectric filler includes any one or a combination of at least two of polytetrafluoroethylene, boron nitride, hollow glass microspheres, or silica.

5. The polybutylene terephthalate / polyphenylene ether alloy material according to any one of claims 1-4, characterized in that, The polybutylene terephthalate / polyphenylene ether alloy material also includes any one or a combination of at least two of the following: toughening agent, antioxidant, or colorant.

6. The polybutylene terephthalate / polyphenylene ether alloy material according to claim 5, characterized in that, The polybutylene terephthalate / polyphenylene ether alloy material includes 3-8 parts toughening agent by weight; Preferably, the polybutylene terephthalate / polyphenylene ether alloy material includes 1-2 parts by weight of antioxidant; Preferably, the polybutylene terephthalate / polyphenylene ether alloy material includes 1-2 parts of color powder by weight.

7. The polybutylene terephthalate / polyphenylene ether alloy material according to claim 5, characterized in that, The toughening agent includes a methyl methacrylate-butadiene-styrene terpolymer; Preferably, the antioxidant includes any one or a combination of at least two of hindered phenolic antioxidants, phosphite antioxidants, or thioester antioxidants; Preferably, the pigment includes carbon black.

8. A method for preparing a polybutylene terephthalate / polyphenylene ether alloy material as described in any one of claims 1-7, characterized in that, The components of the polybutylene terephthalate / polyphenylene ether alloy material are mixed in proportions by weight, and then melt-granulated to obtain the polybutylene terephthalate / polyphenylene ether alloy material.

9. The preparation method according to claim 8, characterized in that, The mixing time is 10-20 min; Preferably, the melt granulation is carried out in a twin-screw extruder; Preferably, the temperatures of each zone of the twin-screw extruder are as follows: Zone 1: 135-145℃; Zone 2: 245-255℃; Zone 3: 255-265℃; Zone 4: 275-285℃; Zone 5: 270-280℃; Zone 6: 255-265℃; Zone 7: 245-255℃; Zone 8: 245-255℃; Zone 9: 245-255℃; and Zone 10: 255-265℃. Preferably, the screw speed of the twin-screw extruder is 500-700 r / min; Preferably, the residence time of the mixture in the twin-screw extruder is 2-4 minutes; Preferably, the melt granulation further includes cooling, drying, and pelletizing steps.

10. The application of the polybutylene terephthalate / polyphenylene ether alloy material as described in any one of claims 1-7 in industrial machinery parts, automotive parts, electronic device housings and internal components, and medical devices.

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