Polycarbonate polyurethane materials, polycarbonate / polyamide composites containing same, and preparation and use thereof

Abstract

The application provides a polycarbonate polyurethane material, a polycarbonate / polyamide composite material containing the polycarbonate polyurethane material and preparation and application of the polycarbonate / polyamide composite material, wherein the polycarbonate polyurethane material comprises a mixture and / or reaction product of the following components: polyester polyol, polyisocyanate compound, chain extender. The polycarbonate polyurethane material with the special structure is introduced into polycarbonate, polyamide, reinforcing material and functional auxiliary components, so that the interface strength, compatibility and toughness of the polycarbonate / polyamide composite material can be obviously improved, and the polycarbonate / polyamide composite material can be used in the fields of photoelectricity, communication, electronics, automobile, medical treatment, safety, aviation and spaceflight.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of high polymer composite materials, and particularly relates to a polycarbonate type polyurethane material, a polycarbonate / polyamide composite material containing the same, and preparation and application thereof. BACKGROUND

[0002] Polycarbonate is a kind of resin material containing dihydroxy compound and carbonic acid structure, which can be divided into aliphatic, alicyclic, aromatic, aliphatic-aromatic, alicyclic-aromatic, etc., and has excellent impact toughness, insulation, wide use temperature range, and dimensional stability, and is an engineering plastic with good comprehensive performance. However, polycarbonate has some defects, such as easy stress cracking, sensitivity to notches, poor wear resistance, and poor processing flowability, etc. In addition, when blended and modified with inorganic materials or organic polymer materials, there are often problems of weak interfacial strength and poor compatibility. In this regard, physical / chemical modification of polycarbonate to prepare alloy materials is a major research direction. WO0320827A, CN110499010A, CN110256829A, CN107312307A, CN107915974A, CN111087778A, CN109575552A, etc. report the preparation methods of polycarbonate alloy materials.

[0003] Polyamide is an engineering plastic with excellent comprehensive performance, possessing advantages such as high strength, high modulus, corrosion resistance, and self-lubrication. It is classified into aliphatic, semi-aromatic, fully aromatic, and aliphatic-aromatic types. Due to the presence of amide groups, it is prone to water absorption, which often leads to dimensional and performance instability, thus limiting its application. Effectively combining polycarbonate and polyamide, two engineering materials with complementary properties, is expected to improve the processability and notch sensitivity of polycarbonate, while simultaneously improving the impact resistance and dimensional stability of polyamide, resulting in a polycarbonate / polyamide composite material with excellent comprehensive performance, thereby broadening the application range of both materials. The study "Research on PA6 / PC-based Laser Direct Molding Materials and Preparation of Three-Dimensional Structure Parts" (China Plastics, 2022, 36(2): 8-12) found that simply combining polycarbonate and polyamide 6 results in poor mechanical properties due to poor compatibility, failing to obtain a composite material with excellent performance. Therefore, compatibility or toughening modification is necessary. CN106883573A, CN101845210A, CN106751641A, etc., report the use of styrene-maleic anhydride copolymer (SMA), copolymers containing epoxy and anhydride groups, silicone / acrylate-SAN core-shell polymers, glycidyl methacrylate-grafted ABS, and ethylene-methyl acrylate-glycidyl methacrylate terpolymers to improve the compatibility of polycarbonate and polyamide. CN102898805A discloses the use of thermoplastic polyurethane and polycarbonate to improve the low-temperature resistance of polycarbonate composites, but no reports have been found on the preparation of polycarbonate-type polyurethane materials with special structures or their application in polycarbonate / polyamide composites. Summary of the Invention

[0004] To overcome the problem of poor compatibility when polycarbonate and polyamide are blended and modified in the prior art, the present invention provides a polycarbonate-type polyurethane material that can significantly improve the interfacial strength, compatibility and toughness of polycarbonate / polyamide composites, and can be used in optoelectronic, communication, electronics, automotive, medical, safety, aviation and aerospace fields.

[0005] One objective of this invention is to provide a polycarbonate-type polyurethane material comprising a mixture of the following components and / or reaction products: polyester polyol, polyisocyanate compounds, and chain extenders, wherein the polyester polyol comprises polycarbonate polyol and optionally added polyacid ester polyol, and the polyisocyanate compounds comprise at least one of triisocyanate compounds, tetraisocyanate compounds, and optionally added diisocyanate compounds.

[0006] According to some embodiments of the present invention, in the polycarbonate-type polyurethane material:

[0007] The polycarbonate polyol is selected from at least one of bisphenol A type polycarbonate polyol, aliphatic polycarbonate polyol, aliphatic-aromatic copolycarbonate polyol, and polysiloxane-carbonate polyol;

[0008] The triisocyanate compound is selected from at least one of 4,4′,4″-triphenylmethane triisocyanate, L-lysine triisocyanate, and three-arm polyethylene glycol triisocyanate;

[0009] The tetraisocyanate compound mentioned is selected from tetra-arm polyethylene glycol tetraisocyanate;

[0010] The diisocyanate compound is selected from at least one of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 1,5-naphthalene diisocyanate, and lysine diisocyanate;

[0011] The chain extender is selected from hydroxylamine-containing compounds, preferably from at least one of ethanolamine, diethanolamine, triethanolamine, triisopropanolamine, and N,N'-bis(2-hydroxypropyl)aniline.

[0012] A second objective of this invention is to provide a method for preparing the aforementioned polycarbonate-type polyurethane material, comprising: polymerizing the aforementioned polyester polyol, polyisocyanate compound, and chain extender under the action of a catalyst to obtain the aforementioned polycarbonate-type polyurethane material.

[0013] According to some embodiments of the present invention, in the method for preparing the polycarbonate-type polyurethane material:

[0014] The catalyst is selected from at least one of N,N-dimethylcyclohexylamine, N,N-dimethylethanolamine, N,N-dimethylpyridine, and trimethylenediamine;

[0015] The molar ratio of the polyester polyol to the polyisocyanate compound is (0.5-2):1, preferably (0.9-1.1):1;

[0016] The molar ratio of the polyester polyol to the chain extender is (0.5-50):1, preferably (1-35):1;

[0017] The molar amount of the catalyst, in terms of molar percentage, is 0.0001 to 0.1% of the total molar amount of the polyester polyol, polyisocyanate compound, and chain extender, preferably 0.0002 to 0.05%.

[0018] The polymerization reaction is carried out in a protective gas atmosphere, which can be a commonly used inert gas, such as nitrogen or argon.

[0019] The polymerization reaction can be carried out using common stirring devices, such as mechanical stirring devices, with a stirring speed of 50 to 800 rpm, preferably 150 to 650 rpm.

[0020] The polymerization reaction conditions are as follows: the reaction temperature is 40-90℃, preferably 50-85℃; the reaction time is 0.5-12 hours, preferably 1.5-8 hours.

[0021] A third objective of this invention is to provide a polycarbonate / polyamide composite material, including the above-mentioned polycarbonate-type polyurethane material, or including the polycarbonate-type polyurethane material obtained by the above-mentioned preparation method.

[0022] According to some embodiments of the present invention, the polycarbonate / polyamide composite material comprises:

[0023] (1) Polycarbonate, 15 to 85 parts by weight, preferably 20 to 80 parts by weight;

[0024] (2) Polyamide, 15-85 parts by weight, preferably 20-80 parts by weight;

[0025] (3) Interface modifier, 1 to 15 parts by weight, preferably 3 to 12 parts by weight;

[0026] (4) Reinforcing material, 0 to 100 parts by weight, preferably 5 to 90 parts by weight;

[0027] (5) Functional additives, 0.001 to 10 parts by weight, preferably 0.005 to 8 parts by weight;

[0028] The interface modifier is a polycarbonate-type polyurethane material.

[0029] According to some embodiments of the present invention, in the polycarbonate / polyamide composite material:

[0030] The polycarbonate is selected from at least one of bisphenol A type polycarbonate, aliphatic polycarbonate, aliphatic-aromatic copolycarbonate, and polysiloxane-carbonate; the weight-average molecular weight of the polycarbonate is 15,000 to 50,000 g / mol, preferably 20,000 to 45,000 g / mol; the number-average molecular weight is 10,000 to 40,000 g / mol, preferably 15,000 to 30,000 g / mol;

[0031] The polyamide is selected from at least one of aliphatic polyamide, semi-aromatic polyamide, and fully aromatic polyamide; the relative viscosity of the polyamide is 1 to 5, preferably 2 to 4;

[0032] The reinforcing material is selected from at least one of the following: glass beads, glass powder, glass fiber, basalt fiber, ceramic fiber, asbestos fiber, gypsum fiber, carbon fiber, aramid fiber, zinc oxide whiskers, aluminum borate whiskers, alumina, silicon oxide, magnesium oxide, zirconium oxide, titanium oxide, iron oxide, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, calcium phosphate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, wollastonite, talc, zeolite, soapstone, sericite, mica, silicon carbide, boron nitride, montmorillonite, bentonite, kaolin, and clay.

[0033] The functional additives are selected from at least one of coupling agents, flame retardants, laser direct forming agents, plasticizers, heat stabilizers, antioxidants, ultraviolet absorbers, and release agents. The coupling agent is selected from at least one of silane coupling agents and titanate coupling agents. The flame retardant is selected from at least one of organophosphate flame retardants, polysiloxanes, and aluminum diethylphosphite. The laser direct forming agent is selected from at least one of cuprous oxide, copper oxide, copper manganate, copper chromate, copper dimanganate, copper dichromate, copper sulfate, basic copper sulfate, copper phosphate, copper hydroxyphosphate, and copper polyphosphate. The plasticizer is selected from at least one of phthalates, glyceryl tristearate, and epoxidized soybean oil. The heat stabilizer is selected from triphenyl phosphite, tri-(2,6-)phosphite, and tri-(2,6-)phosphite. The antioxidant is selected from at least one of the following: trimethylphenyl phosphate, trimethyl phosphate, dimethylphenyl phosphate, and benzotriazole; the antioxidant is selected from at least one of the following: tri(nonylphenyl) phosphite, tri(2,4-di-tert-butylphenyl) phosphite, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 2,6-di-tert-butyl-4-methylphenol; the ultraviolet absorber is selected from at least one of the following: hydroxybenzodiazole, hydroxybenzotriazine, hydroxybenzophenone, and benzoxazinone; the mold release agent is selected from at least one of the following: zinc stearate, calcium stearate, barium stearate, magnesium stearate, stearyl stearate, pentaerythritol tetrastearate, paraffin wax, and silicone oil.

[0034] The fourth objective of this invention is to provide a method for preparing the above-mentioned polycarbonate / polyamide composite material, comprising: melt-blending components including the polycarbonate, polyamide, interface modifier, reinforcing material, and functional additive to obtain the polycarbonate / polyamide composite material.

[0035] According to some embodiments of the present invention, the melt blending can be carried out using melt blending equipment and melt blending conditions commonly used in the art, for example, in a mixer or screw extruder, wherein the temperature of the melt blending is 190–360°C, preferably 240–330°C; when the melt blending is carried out in a mixer, the rotor speed is 10–200 rpm, preferably 50–150 rpm; when the melt blending is carried out in a screw extruder, the screw speed is 50–400 rpm, preferably 100–300 rpm.

[0036] The fifth objective of this invention is to provide an application of the above-mentioned polycarbonate / polyamide composite material or the polycarbonate / polyamide composite material prepared by the above-mentioned preparation method in the fields of optoelectronics, communications, electronics, automobiles, medical, safety, aviation, and aerospace.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] This invention reacts polycarbonate polyols with isocyanate compounds containing triisocyanates or tetraisocyanates to obtain a polycarbonate-type polyurethane material with a dendritic structure. This dendritic polyurethane material is then introduced into a polycarbonate / polyamide blend system. The isocyanate groups in this polycarbonate-type polyurethane material can undergo ester-amide reactions with the ester groups of polycarbonate and the amide groups of polyamide through chemical bonding, achieving chain extension or compatibilization effects. Simultaneously, the polycarbonate segments in this polycarbonate-type polyurethane material further form a miscible system with polycarbonate, improving the compatibility of the composite material system. Furthermore, this polycarbonate-type polyurethane material can also wet and reinforce the surface of materials, improving the interfacial properties of the inorganic / organic multi-component composite system and endowing the polycarbonate / polyamide composite material with excellent comprehensive physical properties, achieving good technical results. Detailed Implementation

[0039] The present invention will now be described in detail with reference to specific embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the content of the present invention are still within the scope of protection of the present invention.

[0040] The testing instruments and conditions used in this embodiment are as follows:

[0041] Molecular weight was determined using gel permeation chromatography with tetrahydrofuran as the mobile phase.

[0042] Viscosity was measured using a viscometer according to GB / T40006.8-2021 standard.

[0043] The notched impact strength of the cantilever beam was determined using a pendulum impact tester according to ASTM D256 standard, with a pendulum energy of 5J.

[0044] The modulus of elasticity was determined using a universal testing machine according to ISO 527-1-2012 standard, with a tensile rate of 5 mm / min.

[0045] The heat distortion temperature was measured using a Vicat heat distortion tester according to ISO 75-2 standard, with a load of 1.8 MPa.

[0046] Infrared spectra were measured using an infrared spectrometer.

[0047] The adhesion between the coating and the substrate was tested according to the cross-cut adhesion test method of GB / T9286-98.

[0048] Unless otherwise specified, the raw materials used in the examples and comparative examples are all disclosed in the prior art, such as those that can be directly purchased or prepared according to the preparation methods disclosed in the prior art.

[0049] Bisphenol A type polycarbonate polyol: Henan Wanshan New Materials Co., Ltd.

[0050] Polysiloxane-carbonate polyol (BT-8830): Guangzhou Batai Chemical Co., Ltd.

[0051] Aliphatic polyester polyol (LA524145): Shandong Li'ang New Materials Co., Ltd.

[0052] 4,4′,4″-Triphenylmethane triisocyanate: Hubei Xinmingtai Chemical Co., Ltd.

[0053] Four-arm polyethylene glycol tetraisocyanate: Shanghai Pengsheng Biotechnology Co., Ltd.

[0054] Toluene diisocyanate: Shandong Xuchen Chemical Co., Ltd.

[0055] 1,5-Naphthalene diisocyanate: Shanghai Yuanye Biotechnology Co., Ltd.

[0056] Isoflurone diisocyanate: Wuhan Lanabai Pharmaceutical Chemical Co., Ltd.

[0057] Triethanolamine: Aladdin Company

[0058] N,N′-Bis(2-hydroxypropyl)aniline: Aladdin Company

[0059] N,N-Dimethylpyridine: Shanghai Huayuan Century Company

[0060] Bisphenol A type polycarbonate: Sinopec Yanshan Petrochemical Company

[0061] Polysiloxane-carbonate (EXL1414T): SABIC

[0062] Polyamide 66: DuPont

[0063] Polyamide 1012: Shandong Dongchen Company

[0064] Polyamide 11: Arkema, France

[0065] Polyamide 6T: GCL Group

[0066] Polyamide 6I: EMS, Switzerland

[0067] Polyamide 9T: Kuraray Corporation

[0068] Pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]: Shanghai Kaiyin Chemical Co., Ltd. Long glass fiber: Jushi Group Co., Ltd.

[0069] Short glass fiber: Jushi Group

[0070] Carbon fiber: Sinopec Shanghai Petrochemical Company

[0071] Talc: Anshan Ruixue Mineral Company

[0072] N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane: Guangzhou Zhongjie New Materials Co., Ltd.

[0073] Diethylaluminum hypophosphite: Clariant

[0074] Triphenyl phosphate: Shandong Polymer Chemical Company

[0075] Copper phosphate: Guangao Biotechnology Co., Ltd.

[0076] Zinc stearate: Aladdin Company

[0077] Styrene / maleic anhydride random copolymer: Clayville Corporation, USA; Ethylene-methyl acrylate-glycidyl methacrylate terpolymer: Wuhan Huipu New Materials Co., Ltd.; Aromatic polycarbonate-based polyurethane: Lurunbo Corporation, USA.

[0078]

Example 1

[0079] (1) Preparation of polycarbonate-type polyurethane materials:

[0080] Under nitrogen protection and mechanical stirring at 200 rpm, 800 g of bisphenol A type polycarbonate polyol (molecular weight 850 g / mol), 25 g of triethanolamine, 20 g of 4,4′,4″-triphenylmethane triisocyanate, and 200 g of toluene diisocyanate (2,4-isomer: 2,6-isomer = 80:20) were added sequentially to a reactor and stirred for 5 minutes. Then, 0.002 g of N,N-dimethylpyridine was added, and stirring and mixing continued for 3 minutes. The temperature was raised to 60°C, and the reaction was carried out for 3 hours. The product was then extruded through the reactor outlet, cooled by strong air from a conveyor belt, and pelletized to obtain polycarbonate type polyurethane material PU-1.

[0081] (2) Preparation of polycarbonate / polyamide composites:

[0082] 700 g of bisphenol A type polycarbonate (number average molecular weight 21000 g / mol, weight average molecular weight 40800 g / mol) and 300 g of polyamide 66 (viscosity 2.80) were dried and then mixed with 90 g of polycarbonate type polyurethane material PU-1, 50 g of talc (particle size 5-20 micrometers), 15 g of triphenyl phosphate, 5 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 200 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 280℃ and screw speed 200 rpm, the mixture was melt-extruded, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 1.

[0083]

Example 2

[0084] Preparation of polycarbonate / polyamide composites:

[0085] 658 g of bisphenol A type polycarbonate (number average molecular weight 21000 g / mol, weight average molecular weight 40800 g / mol) and 282 g of polyamide 66 (viscosity 2.80) were dried and then mixed with 150 g of polycarbonate type polyurethane material PU-1, 50 g of talc (particle size 5-20 micrometers), 15 g of triphenyl phosphate, 5 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 200 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 280℃ and screw speed 200 rpm, the mixture was melt-extruded, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 1.

[0086]

Example 3

[0087] Preparation of polycarbonate / polyamide composites:

[0088] 609 g of bisphenol A type polycarbonate (number average molecular weight 21000 g / mol, weight average molecular weight 40800 g / mol) and 261 g of polyamide 66 (viscosity 2.80) were dried and then mixed with 20 g of polycarbonate type polyurethane material PU-12, 50 g of talc (particle size 5-20 micrometers), 15 g of triphenyl phosphate, 5 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 200 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 280℃ and screw speed 200 rpm, the mixture was melt-extruded, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 1.

[0089]

Example 4

[0090] Preparation of polycarbonate / polyamide composites:

[0091] 553 g of bisphenol A type polycarbonate (number average molecular weight 21000 g / mol, weight average molecular weight 40800 g / mol) and 237 g of polyamide 66 (viscosity 2.80) were dried and then mixed with 300 g of polycarbonate type polyurethane material PU-1, 50 g of talc (particle size 5-20 micrometers), 15 g of triphenyl phosphate, 5 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] to form a uniform mixture. The mixture was fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 200 g of long glass fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 280℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 1.

[0092] Comparative Example 1

[0093] Preparation of polycarbonate / polyamide composites:

[0094] 763 g of bisphenol A type polycarbonate (number average molecular weight 21000 g / mol, weight average molecular weight 40800 g / mol) and 327 g of polyamide 66 (viscosity 2.80) were dried and then mixed with 50 g of talc (particle size 5-20 μm), 15 g of triphenyl phosphate, 5 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 200 g of long glass fiber was introduced into the middle section of the extruder. The polycarbonate / polyamide composite material was obtained by melt extrusion, cooling, and granulation under the process conditions of processing temperature 280℃ and screw speed 200 rpm. Its properties are listed in Table 1.

[0095] Table 1

[0096]

[0097] As can be seen from Table 1, compared with Comparative Example 1, when polycarbonate-type polyurethane material is introduced into the polycarbonate / polyamide 66 / glass fiber composite system, the isocyanate groups of the polycarbonate-type polyurethane material can wet the surface of glass fiber and inorganic additives, improve the interfacial adhesion between polycarbonate, polyamide 66 and inorganic materials, thereby effectively improving the toughness and modulus of the composite material and playing a role in compatibilization and reinforcement.

[0098]

Example 5

[0099] (1) Preparation of polycarbonate-type polyurethane materials:

[0100] Under nitrogen protection and mechanical stirring at 300 rpm, 800 g of polysiloxane-carbonate polyol (molecular weight 1200 g / mol, siloxane to carbonate molar ratio 1:9), 50 g of aliphatic polyester polyol LA524145 (molecular weight 1500 g / mol), 50 g of N,N′-bis(2-hydroxypropyl)aniline, 20 g of tetra-arm polyethylene glycol tetraisocyanate (molecular weight 2000 g / mol), 100 g of toluene diisocyanate (2,4-isomer: 2,6-isomer = 65:35), and 100 g of 1,5-naphthalene diisocyanate were added sequentially to a reactor and stirred for 5 minutes. Then, 0.0025 g of N,N-dimethylpyridine was added, and stirring and mixing continued for 3 minutes. The temperature was raised to 72°C, and the reaction was carried out for 4 hours. The product was extruded through the reactor outlet, cooled by strong air from a conveyor belt, and pelletized to obtain polycarbonate-type polyurethane material PU-2.

[0101] (2) Preparation of polycarbonate / polyamide composites:

[0102] 500g of polysiloxane-carbonate (number average molecular weight 15000g / mol, weight average molecular weight 32000g / mol) and 500g of polyamide 1012 (viscosity 2.05) were dried and then mixed with 75g of polycarbonate-type polyurethane material PU-2, 80g of talc (particle size 5-20 micrometers), 25g of diethyl aluminum hypophosphite, 3g of zinc stearate, and 1g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16mm, length-to-diameter ratio 40). At the same time, 100g of carbon fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 280℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 2.

[0103]

Example 6

[0104] Preparation of polycarbonate / polyamide composites:

[0105] 455g of polysiloxane-carbonate (number average molecular weight 15000g / mol, weight average molecular weight 32000g / mol) and 455g of polyamide 1012 (viscosity 2.05) were dried and then mixed with 655g of polycarbonate-type polyurethane material PU-21, 80g of talc (particle size 5-20 micrometers), 25g of diethyl aluminum hypophosphite, 3g of zinc stearate, and 1g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16mm, length-to-diameter ratio 40). At the same time, 100g of carbon fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 280℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 2.

[0106]

Example 7

[0107] Preparation of polycarbonate / polyamide composites:

[0108] 300 g of polysiloxane-carbonate (number average molecular weight 15000 g / mol, weight average molecular weight 32000 g / mol) and 700 g of polyamide 1012 (viscosity 2.05) were dried and then mixed with 775 g of polycarbonate-type polyurethane material PU-2, 80 g of talc (particle size 5-20 micrometers), 25 g of diethyl aluminum hypophosphite, 3 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 100 g of carbon fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 280℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 2.

[0109]

Example 8

[0110] Preparation of polycarbonate / polyamide composites:

[0111] 150 g of polysiloxane-carbonate (number average molecular weight 15000 g / mol, weight average molecular weight 32000 g / mol) and 850 g of polyamide 1012 (viscosity 2.05) were dried and then mixed with 75 g of polycarbonate-type polyurethane material PU-2, 80 g of talc (particle size 5-20 micrometers), 25 g of diethyl aluminum hypophosphite, 3 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 100 g of carbon fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 280℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 2.

[0112] Comparative Example 2

[0113] Preparation of polycarbonate / polyamide composites:

[0114] 300 g of polysiloxane-carbonate (number average molecular weight 15000 g / mol, weight average molecular weight 32000 g / mol) and 700 g of polyamide 1012 (viscosity 2.05) were dried and then mixed with 75 g of styrene / maleic anhydride random copolymer (molar ratio 85:15), 80 g of talc (particle size 5-20 μm), 25 g of diethyl aluminum hypophosphite, 3 g of zinc stearate, and 1 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 100 g of carbon fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 280℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 2.

[0115] Table 2

[0116]

[0117] As can be seen from Table 2, compared with Comparative Example 2, the introduction of polycarbonate-type polyurethane material into the polysiloxane-carbonate / polyamide 1012 / carbon fiber composite system results in an ester-amide chemical reaction between the isocyanate groups of the polycarbonate-type polyurethane material and the ester groups of the polycarbonate and the amide groups of the polyamide. This improves the interfacial adhesion between the polycarbonate, polyamide 1012, and inorganic / organic carbon materials, thereby effectively improving the toughness and modulus of the composite material and providing a compatibilizing and reinforcing effect, which is superior to the styrene / maleic anhydride random copolymer used in the patent literature.

[0118]

Example 9

[0119] Preparation of polycarbonate / polyamide composites:

[0120] 350 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 650 g of polyamide 6T (viscosity 2.55) were dried and then mixed with 100 g of polycarbonate type polyurethane material PU-1, 20 g of diethyl aluminum hypophosphite, 10 g of zinc stearate and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 500 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 310℃ and screw speed 200 rpm, the polycarbonate / polyamide composite material was obtained by melt extrusion, cooling and granulation. Its properties are listed in Table 3.

[0121] Comparative Example 3

[0122] Preparation of polycarbonate / polyamide composites:

[0123] 350 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 650 g of polyamide 6T (viscosity 2.55) were dried and then mixed with 100 g of ethylene-methyl acrylate-glycidyl methacrylate terpolymer (molar ratio 80:15:5), 20 g of diethyl aluminum hypophosphite, 10 g of zinc stearate, and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 500 g of long glass fiber was introduced into the middle section of the extruder. The polycarbonate / polyamide composite material was obtained by melt extrusion, cooling, and granulation under the process conditions of processing temperature 310℃ and screw speed 200 rpm. The properties are listed in Table 3.

[0124] Table 3

[0125]

[0126] As can be seen from Table 3, compared with Comparative Example 3, the mechanical properties and heat resistance of the polycarbonate-polyurethane material introduced into the polycarbonate / polyamide 6T / glass fiber composite system are superior to those of the ethylene-methyl acrylate-glycidyl methacrylate terpolymer used in the patent literature.

[0127]

Example 10

[0128] Preparation of polycarbonate / polyamide composites:

[0129] 350 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 650 g of polyamide 9T (viscosity 2.58) were dried and then mixed with 100 g of polycarbonate type polyurethane material PU-1, 20 g of diethyl aluminum hypophosphite, 10 g of zinc stearate and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 600 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 310℃ and screw speed 200 rpm, the polycarbonate / polyamide composite material was obtained by melt extrusion, cooling and granulation. Its properties are listed in Table 4.

[0130]

Example 11

[0131] Preparation of polycarbonate / polyamide composites:

[0132] 350 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 650 g of polyamide 9T (viscosity 2.58) were dried and then mixed with 150 g of polycarbonate type polyurethane material PU-250 g of polycarbonate type polyurethane material PU-20 g of diethyl aluminum hypophosphite, 10 g of zinc stearate and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 600 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 310℃ and screw speed 200 rpm, the mixture was melt-extruded, cooled and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 4.

[0133]

Example 12

[0134] Preparation of polycarbonate / polyamide composites:

[0135] 350 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 650 g of polyamide 9T (viscosity 2.58) were dried and then mixed with 100 g of polycarbonate type polyurethane material PU-2, 20 g of diethyl aluminum hypophosphite, 10 g of zinc stearate and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 600 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 310℃ and screw speed 200 rpm, the polycarbonate / polyamide composite material was obtained by melt extrusion, cooling and granulation. Its properties are listed in Table 4.

[0136] Comparative Example 4

[0137] Preparation of polycarbonate / polyamide composites:

[0138] 350 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 650 g of polyamide 9T (viscosity 2.58) were dried and then mixed with 100 g of aromatic polycarbonate-based polyurethane (molecular weight 50000 g / mol, toluene diisocyanate / polyester polyol copolymer), 20 g of diethyl aluminum hypophosphite, 10 g of zinc stearate, and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 600 g of long glass fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 310℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. Its properties are listed in Table 4.

[0139] Table 4

[0140]

[0141] As can be seen from Table 4, the comparison between Examples 10-12 and Comparative Example 4 shows that introducing different types of polycarbonate-based polyurethane materials into the polycarbonate / polyamide 9T / glass fiber composite system can better improve the interfacial adhesion between polycarbonate, polyamide 9T and inorganic materials, and is far better than the effect of general-purpose aromatic polycarbonate-based polyurethane.

[0142]

Example 13

[0143] Preparation of polycarbonate / polyamide composites:

[0144] 315 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 585 g of polyamide 9T (viscosity 2.58) were dried and then mixed with 150 g of polycarbonate type polyurethane material PU-250 g of polycarbonate type polyurethane material PU-250 g of copper phosphate 100 g of diethyl aluminum hypophosphite 20 g of zinc stearate 10 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] ester 2 g. The mixture was fed into the granule feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 600 g of long glass fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 310℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. After fiber laser activation treatment (laser output power 20 watts, laser wavelength 1064 nm, laser speed 3000 mm / s, pulse frequency 45 kHz), an 8 mm * 8 mm etched block was obtained; then, copper was electroless plated using the Medmerex electroless plating process for 120 minutes. Its performance is listed in Table 5.

[0145] Comparative Example 5

[0146] Preparation of polycarbonate / polyamide composites:

[0147] 350 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 650 g of polyamide 9T (viscosity 2.58) were dried and then mixed with 100 g of copper phosphate, 20 g of diethyl aluminum hypophosphite, 10 g of zinc stearate and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 600 g of long glass fiber was introduced into the middle section of the extruder. Under the process conditions of processing temperature 310℃ and screw speed 200 rpm, the mixture was melt-extruded, cooled and granulated to obtain a polycarbonate / polyamide composite material. After fiber laser activation treatment (laser output power 20 watts, laser wavelength 1064 nm, laser speed 3000 mm / s, pulse frequency 45 kHz), an 8 mm * 8 mm etched block was obtained; then, copper was electroless plated using the Medmerex electroless plating process for 120 minutes. Its performance is listed in Table 5.

[0148] Comparative Example 6

[0149] Preparation of polycarbonate / polyamide composites:

[0150] 315 g of bisphenol A type polycarbonate (number average molecular weight 25000 g / mol, weight average molecular weight 45000 g / mol) and 585 g of polyamide 9T (viscosity 2.58) were dried and then mixed with 100 g of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 100 g of copper phosphate, 20 g of diethylaluminum hypophosphite, 10 g of zinc stearate, and 2 g of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]. The mixture was fed into the pellet feed port of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 600 g of long glass fiber was introduced into the middle section of the extruder. The mixture was melt-extruded at a processing temperature of 310℃ and a screw speed of 200 rpm, cooled, and granulated to obtain a polycarbonate / polyamide composite material. After fiber laser activation treatment (laser output power 20 watts, laser wavelength 1064 nm, laser speed 3000 mm / s, pulse frequency 45 kHz), an 8 mm * 8 mm etched block was obtained; then, copper was electroless plated using the Medmerex electroless plating process for 120 minutes. Its performance is listed in Table 5.

[0151] Table 5

[0152]

[0153] Compared with Comparative Examples 5 and 6, the polycarbonate-type polyurethane material not only improves the phase interface of the composite system, but also has excellent mechanical properties, which are superior to those of the phase interface system modified by conventional silane coupling agents. At the same time, it can also promote the adhesion between the surface-coated metal layer and the substrate, with no peeling phenomenon, and the cross-cut adhesion test reaches level 5B.

[0154]

Example 14

[0155] (1) Preparation of polycarbonate-type polyurethane materials:

[0156] Under nitrogen protection and mechanical stirring at 300 rpm, 400 g of bisphenol A type polycarbonate polyol (molecular weight 800 g / mol), 30 g of aliphatic polyester polyol (molecular weight 1500 g / mol), 42 g of N,N′-bis(2-hydroxypropyl)aniline, and 200 g of tetra-arm polyethylene glycol tetraisocyanate (molecular weight 550 g / mol) were added sequentially to a reactor and stirred for 5 minutes. Then, 0.003 g of N,N-dimethylpyridine was added, and stirring and mixing continued for 3 minutes. The temperature was raised to 68°C, and the reaction was carried out for 5 hours. The product was then extruded through the reactor outlet, cooled by strong air from a conveyor belt, and pelletized to obtain polycarbonate type polyurethane material PU-3.

[0157] (2) Preparation of polycarbonate / polyamide composites:

[0158] 1000 g of bisphenol A type polycarbonate (number average molecular weight 22000 g / mol, weight average molecular weight 39000 g / mol), 500 g of polyamide 11 (viscosity 2.25), and 500 g of polyamide 6I (viscosity 1.98) were dried and then mixed with 350 g of polycarbonate-type polyurethane material PU-3, 120 g of talc (particle size 5-20 micrometers), 40 g of diethyl aluminum hypophosphite, 5 g of zinc stearate, and tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)]. 3 grams of pentaerythritol propionate were mixed evenly and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 300 grams of short glass fiber were introduced into the middle section of the extruder. Under the process conditions of processing temperature 305℃ and screw speed 225 rpm, polycarbonate / polyamide composite material was obtained through melt extrusion, cooling, and granulation. The composite material has a cantilever beam notched impact strength of 80 J / m, elastic modulus of 7085 MPa, and heat distortion temperature of 190℃.

[0159] Comparative Example 7

[0160] (1) Preparation of polycarbonate-type polyurethane materials:

[0161] Under nitrogen protection and mechanical stirring at 300 rpm, 400 g of bisphenol A type polycarbonate polyol (molecular weight 800 g / mol), 30 g of aliphatic polyester polyol (molecular weight 1500 g / mol), 42 g of N,N′-bis(2-hydroxypropyl)aniline, and 200 g of isophorone diisocyanate were added sequentially to a reactor and stirred for 5 minutes. Then, 0.003 g of N,N-dimethylpyridine was added, and stirring and mixing continued for 3 minutes. The temperature was raised to 68°C, and the reaction was carried out for 5 hours. The product was then extruded through the reactor outlet, cooled by strong air from a conveyor belt, and pelletized to obtain polycarbonate polyurethane material PU-4.

[0162] (2) Preparation of polycarbonate / polyamide composites:

[0163] 1000 g of bisphenol A type polycarbonate (number average molecular weight 22000 g / mol, weight average molecular weight 39000 g / mol), 500 g of polyamide 11 (viscosity 2.25), and 500 g of polyamide 6I (viscosity 1.98) were dried and then mixed with 500 g of polycarbonate-type polyurethane material PU-4, 120 g of talc (particle size 5-20 micrometers), 40 g of diethyl aluminum hypophosphite, 5 g of zinc stearate, and tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)]. 3 grams of pentaerythritol propionate were mixed evenly and fed into the pellet feed inlet of a LABTECH co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio 40). At the same time, 300 grams of short glass fiber were introduced into the middle section of the extruder. Under the process conditions of processing temperature 305℃ and screw speed 225 rpm, polycarbonate / polyamide composite material was obtained through melt extrusion, cooling, and granulation. The notched impact strength of the cantilever beam was 61 J / m, the elastic modulus was 6269 MPa, and the heat distortion temperature was 179℃.

[0164] Comparing Example 14 with Comparative Example 7, the polycarbonate-type polyurethane material prepared using a multifunctional isocyanate monomer can impart better mechanical and heat resistance properties to the polycarbonate / polyamide composite material compared to the difunctional isocyanate monomer system, showing a superior technical effect.

Claims

1. A polycarbonate / polyamide composite material, characterized in that, The polycarbonate / polyamide composite material includes: (1) Polycarbonate, 15-85 parts by weight; (2) Polyamide, 15-85 parts by weight; (3) Interface modifier, 1~15 parts by weight; (4) Reinforcing material, 0~100 parts by weight; (5) Functional additives, 0.001~10 parts by weight; The interface modifier is a polycarbonate-type polyurethane material, which includes a mixture of the following components and / or reaction products: polyester polyol, polyisocyanate compound, and chain extender. The polyester polyol includes polycarbonate polyol and optionally added polyfatty ester polyol. The polyisocyanate compound includes at least one of triisocyanate compound and tetraisocyanate compound and optionally added diisocyanate compound.

2. The polycarbonate / polyamide composite material according to claim 1, characterized in that, The polycarbonate / polyamide composite material includes: (1) Polycarbonate, 20-80 parts by weight; (2) Polyamide, 20-80 parts by weight; (3) Interface modifier, 3-12 parts by weight; (4) Reinforcing material, 5-90 parts by weight; (5) Functional additives, 0.005 to 8 parts by weight.

3. The polycarbonate / polyamide composite material according to claim 1, characterized in that, The polycarbonate polyol is selected from at least one of bisphenol A type polycarbonate polyol, aliphatic polycarbonate polyol, aliphatic-aromatic copolycarbonate polyol, and polysiloxane-carbonate polyol; and / or, The triisocyanate compound is selected from at least one of 4,4′,4′′-triphenylmethane triisocyanate, L-lysine triisocyanate, and three-arm polyethylene glycol triisocyanate; and / or, The tetraisocyanate compound is selected from tetra-arm polyethylene glycol tetraisocyanate; and / or, The diisocyanate compound is selected from at least one of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 1,5-naphthalene diisocyanate, and lysine diisocyanate; and / or, The chain extender is selected from compounds containing hydroxylamine.

4. The polycarbonate / polyamide composite material according to claim 3, characterized in that, The chain extender is selected from at least one of ethanolamine, diethanolamine, triethanolamine, triisopropanolamine, and N,N'-bis(2-hydroxypropyl)aniline.

5. The polycarbonate / polyamide composite material according to claim 1, characterized in that, The method for preparing the polycarbonate-type polyurethane material includes: polymerizing the polyester polyol, polyisocyanate compound, and chain extender under the action of a catalyst to obtain the polycarbonate-type polyurethane material.

6. The polycarbonate / polyamide composite material according to claim 5, characterized in that, The catalyst is selected from at least one of N,N-dimethylcyclohexylamine, N,N-dimethylethanolamine, N,N-dimethylpyridine, and trimethylenediamine; and / or, The molar ratio of the polyester polyol to the polyisocyanate compound is (0.5~2):1; and / or, The molar ratio of the polyester polyol to the chain extender is (0.5~50):1; and / or, In terms of molar percentage, the molar amount of the catalyst is 0.0001~0.1% of the total molar amount of the polyester polyol, polyisocyanate compound, and chain extender; and / or, The polymerization reaction is carried out in a protective gas atmosphere; and / or, The polymerization reaction conditions are: reaction temperature of 40~90℃ and reaction time of 0.5~12 hours.

7. The polycarbonate / polyamide composite material according to claim 6, characterized in that, The molar ratio of the polyester polyol to the polyisocyanate compound is (0.9~1.1):1; and / or, The molar ratio of the polyester polyol to the chain extender is (1~35):1; and / or, In terms of molar percentage, the molar amount of the catalyst is 0.0002~0.05% of the total molar amount of the polyester polyol, polyisocyanate compound, and chain extender; and / or, The polymerization reaction conditions are: reaction temperature of 50~85℃ and reaction time of 1.5~8 hours.

8. The polycarbonate / polyamide composite material according to claim 1, characterized in that, The polycarbonate is selected from at least one of bisphenol A type polycarbonate, aliphatic polycarbonate, aliphatic-aromatic copolycarbonate, and polysiloxane-carbonate; and / or, The polycarbonate has a weight-average molecular weight of 15,000–50,000 g / mol and a number-average molecular weight of 10,000–40,000 g / mol; and / or, The polyamide is selected from at least one of aliphatic polyamide, semi-aromatic polyamide, and fully aromatic polyamide; and / or, The relative viscosity of the polyamide is 1~5; and / or, The reinforcing material is selected from at least one of the following: glass beads, glass powder, glass fiber, basalt fiber, ceramic fiber, asbestos fiber, gypsum fiber, carbon fiber, aramid fiber, zinc oxide whiskers, aluminum borate whiskers, alumina, silicon oxide, magnesium oxide, zirconium oxide, titanium oxide, iron oxide, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, calcium phosphate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, wollastonite, talc, zeolite, soapstone, mica, silicon carbide, boron nitride, montmorillonite, bentonite, kaolin, and clay; and / or, The functional additives are selected from at least one of coupling agents, flame retardants, laser direct forming agents, plasticizers, heat stabilizers, antioxidants, ultraviolet light absorbers, and release agents.

9. The polycarbonate / polyamide composite material according to claim 8, characterized in that, The polycarbonate has a weight-average molecular weight of 20,000–45,000 g / mol and a number-average molecular weight of 15,000–30,000 g / mol; and / or, The relative viscosity of the polyamide is 2 to 4.

10. The polycarbonate / polyamide composite material according to claim 8, characterized in that, The coupling agent is selected from at least one of silane coupling agents and titanate coupling agents; and / or, The flame retardant is selected from at least one of organophosphate flame retardants, polysiloxanes, and diethylaluminum hypophosphite; and / or, The laser direct forming agent is selected from at least one of cuprous oxide, copper oxide, copper manganate, copper chromate, copper dimanganate, copper dichromate, copper sulfate, basic copper sulfate, copper phosphate, copper hydroxyphosphate, and copper polyphosphate; and / or, The plasticizer is selected from at least one of phthalates, glyceryl tristearate, and epoxidized soybean oil; and / or, The heat stabilizer is selected from at least one of triphenyl phosphite, tri-(2,6-dimethylphenyl) phosphite, trimethyl phosphate, dimethylphenyl phosphate, and benzotriazole; and / or, The antioxidant is selected from at least one of the following: tris(nonylphenyl) phosphite, tris(2,4-di-tert-butylphenyl) phosphite, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 2,6-di-tert-butyl-4-methylphenol; and / or, The ultraviolet absorber is selected from at least one of hydroxybenzodiazole, hydroxybenzotriazine, hydroxybenzophenone, and benzoxazinone; and / or, The release agent is selected from at least one of zinc stearate, calcium stearate, barium stearate, magnesium stearate, stearyl stearate, pentaerythritol tetrastearate, paraffin wax, and silicone oil.

11. A method for preparing the polycarbonate / polyamide composite material according to any one of claims 1 to 10, comprising: The polycarbonate / polyamide composite material is obtained by melt blending the components including the polycarbonate, polyamide, interface modifier, reinforcing material, and functional additives.

12. The preparation method according to claim 11, characterized in that, The melt blending temperature is 190~360℃; and / or, The melt blending is carried out in a mixer or screw extruder.

13. The preparation method according to claim 12, characterized in that, The melt blending temperature is 240~330℃.

14. The application of a polycarbonate / polyamide composite material according to any one of claims 1 to 10 or a polycarbonate / polyamide composite material prepared by any one of claims 11 to 13 in the fields of optoelectronics, communications, electronics, automobiles, medical, safety, aviation, and aerospace.

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