High-toughness fatigue-resistant PC / ABS alloy and preparation method thereof

Abstract

The invention discloses a high-toughness and fatigue-resistant PC / ABS (Polycarbonate / Acrylonitrile Butadiene Styrene) alloy, which is characterized in that the high-toughness and fatigue-resistant PC / ABS alloy is prepared from the following raw material composition in parts by mass: 62 to 64 parts of polycarbonate, 33 to 35 parts of acrylonitrile-butadiene-styrene copolymer, 1.0 to 2.0 parts of ZeMac, 0.1 to 1.0 part of amino-terminated polystyrene polymer and 0.1 to 0.4 part of antioxidant. According to the invention, ZeMac, polycarbonate and an amino-terminated polystyrene polymer are subjected to an in-situ reaction to form a double-grafted structure, so that the surface tension of polycarbonate and an acrylonitrile-butadiene-styrene copolymer is effectively reduced, and the interface bonding force of two phases of polycarbonate and the acrylonitrile-butadiene-styrene copolymer is enhanced; the amino-terminated polystyrene polymer and the antioxidant are selected, so that the excellent mechanical property and fatigue resistance of the PC / ABS alloy are enhanced.

Description

Technical Field

[0001] The invention relates to the field of polymer additives, and in particular to a high-toughness and fatigue-resistant PC / ABS alloy and a preparation method thereof. Background Art

[0002] Polycarbonate (PC) is a polymer material with excellent mechanical properties and excellent heat and weather resistance, and is widely used in the fields of electronics, aerospace, etc. However, the high melt viscosity of PC and the presence of a large number of benzene rings on the molecular chain are not conducive to the slippage between PC molecular chains, making PC a notch-sensitive material and PC products prone to stress cracking during application, which greatly limits the application of PC. Therefore, the development of PC composite materials with excellent performance has become an urgent problem to be solved.

[0003] At present, modifying PC by physical or chemical methods to prepare a high-performance PC blend has become a research hotspot. Acrylonitrile-butadiene-styrene copolymer (ABS) has excellent processing properties and good solvent resistance, so it has become one of the important raw materials for blending and modifying PC to prepare PC / ABS alloys with excellent performance. However, due to the differences in the structures between polymers, most polymers are often thermodynamically incompatible, and phase separation often occurs during the processing process, resulting in the deterioration of the mechanical properties of polymer alloys. In actual applications, due to the different strain responses and strain recovery amounts of PC and ABS to the same external force, the interface between the two phases becomes a weak point inside the material. Therefore, when subjected to cyclic loads, PC / ABS composites are prone to interfacial detachment, resulting in sample failure. Therefore, improving the compatibility and fatigue resistance between the two polymer phases is the key to preparing high-performance polymer alloys.

[0004] Compatibilizers are often used to improve the compatibility between incompatible blends. They are mainly divided into non-reactive compatibilizers and reactive compatibilizers according to whether they can undergo chemical reactions during the melt blending process. Non-reactive compatibilizers mainly refer to grafted or block copolymers that have good compatibility with incompatible blending systems, but they are prone to agglomeration during the blending process, which affects their compatibilization efficiency. Reactive compatibilizers mainly refer to those with active functional groups in their molecular structures. During the melt blending process, interfacial reactions are performed to form grafted copolymers in situ, thereby reducing the interfacial tension of the two phases and increasing the interfacial bonding force of the two phases, thereby improving the mechanical properties of the polymer composite material. Therefore, the present invention hopes to prepare a high-toughness and fatigue-resistant PC / ABS alloy and preparation method by rationally designing the molecular structure of the reactive compatibilizer. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a high-toughness and fatigue-resistant PC / ABS alloy and a preparation method thereof. The PC / ABS alloy has particularly strong mechanical properties and fatigue resistance.

[0006] A high-toughness and fatigue-resistant PC / ABS alloy is prepared from the following raw material composition in parts by weight: 62-64 parts of polycarbonate, 33-35 parts of acrylonitrile-butadiene-styrene copolymer, 1.0-2.0 parts of ZeMac, 0.1-1.0 parts of amino-terminated polystyrene polymer, and 0.1-0.4 parts of antioxidant.

[0007] Furthermore, the amino-terminated polystyrene polymer is copolymerized by styrene, an initiator, and a chain transfer agent, and the mass ratio of the styrene, the initiator, and the chain transfer agent is 14-17:1:1-2.

[0008] Furthermore, the initiator is one or more of 2,2-azobisisobutyronitrile and 4,4-azobistetracyanovaleric acid.

[0009] Furthermore, the chain transfer agent is mercaptoethylamine.

[0010] Preferably, the antioxidant is a compound of a hindered phenol antioxidant and a phosphite antioxidant.

[0011] More preferably, the antioxidant is a composition of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1-1.5. Antioxidant 1010 is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and antioxidant 168 is tris[2.4-di-tert-butylphenyl]phosphite.

[0012] Still further preferably, the amino-terminated polystyrene polymer is prepared by the following method: taking a formulated amount of styrene, an initiator and a chain transfer agent and uniformly dispersing them in an organic solvent A to obtain a reaction mixture system; under nitrogen protection, placing the mixture system at a temperature of 60-90° C. (preferably 70° C.) for polymerization reaction for 4 to 8 hours to obtain a crude product; adding the crude product to an organic solvent B for a first precipitation; taking the precipitate and adding an organic solvent C for dissolution to obtain a mixed solution; adding the mixed solution to an organic solvent B for a second precipitation; repeating the operation of adding organic solvent B for the first precipitation to the second precipitation 2-4 times, filtering, removing the filtrate to obtain a final precipitate, and drying to obtain the amino-terminated polystyrene polymer.

[0013] More preferably, the organic solvent A is one or more of 1,4-dioxane and tetrahydrofuran.

[0014] The mass of the organic solvent A is 15-18 times the mass of the initiator.

[0015] More preferably, the organic solvent B is one or more of methanol and ethanol, the organic solvent C is one or more of 1,4-dioxane and tetrahydrofuran, the mass of the organic solvent B is 45-54 times that of the initiator, and the mass of the organic solvent C is 15-18 times that of the initiator.

[0016] The present invention also relates to a method for preparing the above-mentioned high-toughness and fatigue-resistant PC / ABS alloy, and the preparation method is as follows:

[0017] (1) drying polycarbonate, acrylonitrile-butadiene-styrene copolymer, ZeMac, amino-terminated polystyrene polymer, and antioxidant to remove moisture;

[0018] (2) Weigh 62-64 parts of the dried polycarbonate obtained in step (1), 33-35 parts of acrylonitrile-butadiene-styrene copolymer, 1.0-2.0 parts of ZeMac, 0.1-1.0 parts of amino-terminated polystyrene polymer, and 0.1-0.4 parts of antioxidant;

[0019] (3) taking 60%-70% of the antioxidant (preferably 65%), mixing with the formulated amount of polycarbonate and the formulated amount of ZeMac to obtain a first mixed material, adding the first mixed material into a twin-screw extruder, and performing a first melt granulation at a temperature of 220-260° C., a main feeding screw speed of 20-50 rpm, and a main screw speed of 60-100 rpm to obtain a masterbatch;

[0020] (4) The masterbatch is mixed with the remaining antioxidants, a formula amount of acrylonitrile-butadiene-styrene copolymer, and a formula amount of amino-terminated polystyrene polymer to obtain a second mixed material, and the second mixed material is added into a twin-screw extruder, and a second extrusion melt granulation is performed under the conditions of a temperature of 220-260° C., a main feeding screw speed of 20-50 rpm, and a main screw speed of 60-100 rpm to obtain a high-toughness and fatigue-resistant PC / ABS alloy.

[0021] The invention allows ZeMac to react in situ with polycarbonate and amino-terminated polystyrene polymer to form a double graft structure, thereby effectively reducing the surface tension of polycarbonate and acrylonitrile-butadiene-styrene copolymer, enhancing the interfacial bonding force of polycarbonate and acrylonitrile-butadiene-styrene copolymer, thereby improving the compatibility of the two phases, and selecting amino-terminated polystyrene polymer and antioxidant to enhance the excellent mechanical properties and fatigue resistance of PC / ABS alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the synthetic route of PS-NH2 (amino-terminated polystyrene polymer)

[0023] Figure 2 It is the structure and molecular weight characterization of PS-NH2, among which Figure 2 The left is the infrared spectrum of PS-NH2. Figure 2 The middle is the H NMR spectrum of PS-NH2. Figure 2 The right is the GPC spectrum of PS-NH2.

[0024] Figure 3 Infrared characterization of the ring-opening reaction of PS-NH2 and PC (polycarbonate) with ZeMac in Example 1

[0025] Figure 4 The present invention shows the fatigue resistance test results and microscopic morphology characterization of the PC / ABS alloy in Example 1, wherein (a) is the cyclic tensile curve of the PC / ABS alloy; (b) is the cyclic tensile curve of the (PC / ZeMac-1) / ABS alloy; (c) is the cyclic tensile curve of the (PC / ZeMac-1) / (ABS / PS-NH2-1) alloy (i.e., a high-toughness, fatigue-resistant PC / ABS alloy); (d) is the cyclic tensile cross-sectional micromorphology of the PC / ABS alloy; (e) is the cyclic tensile cross-sectional micromorphology of the (PC / ZeMac-1) / ABS alloy; (f) is the cyclic tensile cross-sectional micromorphology of the (PC / ZeMac-1) / (ABS / PS-NH2-1) alloy (i.e., a high-toughness, fatigue-resistant PC / ABS alloy). DETAILED DESCRIPTION

[0026] The present invention is further described below by means of specific embodiments, but the protection scope of the present invention is not limited thereto.

[0027] Example 1

[0028] The preparation method of amino-terminated polystyrene is as follows:

[0029] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Then, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 47.67 g of amino-terminated polystyrene.

[0030] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0031] PC resin (polycarbonate): 634g (63.4wt%); ABS resin (acrylonitrile-butadiene-styrene copolymer): 342g (34.2wt%); Antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a 1:1 mass ratio): 4g (0.4wt%); PS-NH2: (amino-terminated polystyrene polymer) 10g (1.0wt%); ZeMac: 10g (1.0wt%).

[0032] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 hours, and PC resin was dried in an oven at 120°C for 4 hours. Weigh 634g of the dried PC resin (polycarbonate); 342g of ABS resin (acrylonitrile-butadiene-styrene copolymer); 4g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10g of PS-NH2 (amino-terminated polystyrene polymer) obtained above; and 10g of ZeMac.

[0033] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0034] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling and granulation.

[0035] (4) The dried ABS resin, PS-NH2 and antioxidant (1.4 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and after melt blending, cooling, and granulation, a high-toughness and fatigue-resistant PC / ABS alloy was obtained.

[0036] Example 2

[0037] The preparation method of amino-terminated polystyrene is as follows:

[0038] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for reaction for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Subsequently, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 47.21 g of amino-terminated polystyrene.

[0039] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0040] PC resin: 62.8wt%, 628g; ABS resin: 33.8wt%, 338g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; PS-NH2: 2.0wt%, 20g; ZeMac: 1.0wt%, 10g.

[0041] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 h, and PC resin was dried in an oven at 120°C for 4 h. Weigh 628 g of the dried PC resin; 338 g of ABS resin; 4 g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 20 g of PS-NH2 prepared above; and 10 g of ZeMac.

[0042] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0043] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling and granulation.

[0044] (4) The dried ABS resin, PS-NH2 and antioxidant (1.4 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and a high-toughness and fatigue-resistant PC / ABS alloy was obtained through melt blending, cooling and granulation.

[0045] Example 3

[0046] The preparation method of amino-terminated polystyrene is as follows:

[0047] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuum was evacuated, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Subsequently, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 46.93 g of amino-terminated polystyrene.

[0048] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0049] PC resin: 62.8wt%, 628g; ABS resin: 33.8wt%, 338g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; PS-NH2: 1.0wt%, 10g; ZeMac: 2.0wt%, 20g.

[0050] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 h, and PC resin was dried in an oven at 120°C for 4 h. Weigh 628 g of the dried PC resin; 338 g of ABS resin; 4 g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10 g of PS-NH2 prepared above; and 20 g of ZeMac.

[0051] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0052] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling and granulation.

[0053] (4) The dried ABS resin, PS-NH2 and antioxidant (1.4 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and a high-toughness and fatigue-resistant PC / ABS alloy was obtained through melt blending, cooling and granulation.

[0054] Example 4

[0055] The preparation method of amino-terminated polystyrene is as follows:

[0056] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for 6 hours. After the reaction was completed, the crude product was precipitated in ethanol for the first time, and the precipitate was filtered out. Subsequently, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and ethanol was added to the mixed solution for the second precipitation. The operation of adding ethanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system. Finally, the precipitate was dried in a 60°C oven to constant weight to obtain 47.46 g of amino-terminated polystyrene.

[0057] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0058] PC resin (polycarbonate): 634g (63.4wt%); ABS resin (acrylonitrile-butadiene-styrene copolymer): 342g (34.2wt%); Antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a 1:1 mass ratio): 4g (0.4wt%); PS-NH2: (amino-terminated polystyrene polymer) 10g (1.0wt%); ZeMac: 10g (1.0wt%).

[0059] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 hours, and PC resin was dried in an oven at 120°C for 4 hours. Weigh 634g of the dried PC resin (polycarbonate); 342g of ABS resin (acrylonitrile-butadiene-styrene copolymer); 4g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10g of PS-NH2 (amino-terminated polystyrene polymer) obtained above; and 10g of ZeMac.

[0060] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0061] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling and granulation.

[0062] (4) The dried ABS resin, PS-NH2 and antioxidant (1.4 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and after melt blending, cooling, and granulation, a high-toughness and fatigue-resistant PC / ABS alloy was obtained.

[0063] Example 5

[0064] The preparation method of amino-terminated polystyrene is as follows:

[0065] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Then, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 46.87 g of amino-terminated polystyrene.

[0066] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0067] PC resin (polycarbonate): 636g (63.6wt%); ABS resin (acrylonitrile-butadiene-styrene copolymer): 343g (34.3wt%); Antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a 1:1 mass ratio): 1g (0.1wt%); PS-NH2: (amino-terminated polystyrene polymer) 10g (1.0wt%); ZeMac: 10g (1.0wt%).

[0068] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 hours, and PC resin was dried in an oven at 120°C for 4 hours. Weigh 636g of the dried PC resin (polycarbonate); 343g of ABS resin (acrylonitrile-butadiene-styrene copolymer); 1g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10g of PS-NH2 (amino-terminated polystyrene polymer) obtained above; and 10g of ZeMac.

[0069] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (0.65 g) into a high-speed mixer according to the formula ratio and mix evenly to obtain a first mixed material.

[0070] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling and granulation.

[0071] (4) The dried ABS resin, PS-NH2 and antioxidant (0.35 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and after melt blending, cooling, and granulation, a high-toughness and fatigue-resistant PC / ABS alloy was obtained.

[0072] Example 6

[0073] The preparation method of amino-terminated polystyrene is as follows:

[0074] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for reaction for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Subsequently, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 47.09 g of amino-terminated polystyrene.

[0075] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0076] PC resin (polycarbonate): 634g (63.4wt%); ABS resin (acrylonitrile-butadiene-styrene copolymer): 342g (34.2wt%); Antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a 1:1 mass ratio): 4g (0.4wt%); PS-NH2: (amino-terminated polystyrene polymer) 10g (1.0wt%); ZeMac: 10g (1.0wt%).

[0077] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 hours, and PC resin was dried in an oven at 120°C for 4 hours. Weigh 634g of the dried PC resin (polycarbonate); 342g of ABS resin (acrylonitrile-butadiene-styrene copolymer); 4g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10g of PS-NH2 (amino-terminated polystyrene polymer) obtained above; and 10g of ZeMac.

[0078] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0079] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 220°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 220°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling and granulation.

[0080] (4) The dried ABS resin, PS-NH2 and antioxidant (1.4 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 220°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 220°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and after melt blending, cooling, and granulation, a high-toughness and fatigue-resistant PC / ABS alloy was obtained.

[0081] Example 7

[0082] The preparation method of amino-terminated polystyrene is as follows:

[0083] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Then, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 47.36 g of amino-terminated polystyrene.

[0084] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0085] PC resin (polycarbonate): 634g (63.4wt%); ABS resin (acrylonitrile-butadiene-styrene copolymer): 342g (34.2wt%); Antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a 1:1 mass ratio): 4g (0.4wt%); PS-NH2: (amino-terminated polystyrene polymer) 10g (1.0wt%); ZeMac: 10g (1.0wt%).

[0086] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 hours, and PC resin was dried in an oven at 120°C for 4 hours. Weigh 634g of the dried PC resin (polycarbonate); 342g of ABS resin (acrylonitrile-butadiene-styrene copolymer); 4g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10g of PS-NH2 (amino-terminated polystyrene polymer) obtained above; and 10g of ZeMac.

[0087] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0088] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 260°C, zone 5 temperature: 260°C, zone 6 temperature: 260°C, zone 7 temperature: 260°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling and granulation.

[0089] (4) The dried ABS resin, PS-NH2 and antioxidant (1.4 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 260°C, zone 5 temperature: 260°C, zone 6 temperature: 260°C, zone 7 temperature: 260°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and after melt blending, cooling and granulation, a high-toughness and fatigue-resistant PC / ABS alloy was obtained.

[0090] Comparative Example 1

[0091] The preparation method of amino-terminated polystyrene is as follows:

[0092] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for reaction for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Subsequently, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 46.95 g of amino-terminated polystyrene.

[0093] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0094] PC resin: 63.4wt%, 634g; ABS resin: 34.2wt%, 342g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; PS-NH2: 1.0wt%, 10g; ZeMac: 1.0wt%, 10g.

[0095] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 h, and PC resin was dried in an oven at 120°C for 4 h. Weigh 634 g of dried PC resin; 342 g of ABS resin; 4 g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10 g of PS-NH2 prepared above; and 10 g of ZeMac, and add the dried raw materials into a high-speed mixer according to the formula ratio and mix them evenly.

[0096] (2) Add the raw materials mixed uniformly in step (1) into an extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain a high-toughness and fatigue-resistant PC / ABS alloy through melt blending, cooling, and granulation.

[0097] Comparative Example 2

[0098] The preparation method of amino-terminated polystyrene is as follows:

[0099] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Then, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 46.89 g of amino-terminated polystyrene.

[0100] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0101] PC resin: 63.4wt%, 634g; ABS resin: 34.2wt%, 342g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; ZeMac: 1.0wt%, 10g; PS-NH2: 1.0wt%, 10g.

[0102] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 h, and PC resin was dried in an oven at 120°C for 4 h. Weigh 634 g of dried PC resin; 342 g of ABS resin; 4 g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10 g of PS-NH2; and 10 g of ZeMac.

[0103] (2) Add the dried ZeMac, ABS resin (acrylonitrile-butadiene-styrene), and antioxidant (1.4 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0104] (3) Add the first mixed material to the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32rpm, the main screw speed to 80rpm, and obtain ABS / ZeMac / PS-NH2 masterbatch through melt blending, cooling, and granulation.

[0105] (4) The dried PC resin and antioxidant (2.6 g) were mixed with ABS / ZeMac / PS-NH2 masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and a high-toughness and fatigue-resistant PC / ABS alloy was obtained through melt blending, cooling, and granulation.

[0106] Comparative Example 3

[0107] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0108] PC resin: 63.4wt%, 634g; ABS resin: 34.2wt%, 342g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; ZeMac: 2.0wt%, 20g.

[0109] (1) Before melt extrusion, the ABS resin, ZeMac and antioxidant were dried in an oven at 80°C for 4 h, and the PC resin was dried in an oven at 120°C for 4 h. Weigh 634 g of the dried PC resin; 342 g of the ABS resin; 4 g of the antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); and 20 g of ZeMac.

[0110] (2) Add the dried ZeMac, PC resin (polycarbonate), and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix them evenly to obtain a first mixed material.

[0111] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ZeMac masterbatch through melt blending, cooling, and granulation.

[0112] (4) The dried ABS resin and antioxidant (1.4 g) were mixed with PC / ZeMac masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and a high-toughness and fatigue-resistant PC / ABS alloy was obtained through melt blending, cooling, and granulation.

[0113] Comparative Example 4

[0114] The preparation method of amino-terminated polystyrene is as follows:

[0115] Mercaptoethylamine (3.36 g), 1,4-dioxane (51.70 g), 2,2-azobisisobutyronitrile (3.15 g) and styrene (49.61 g) were placed in a three-necked flask to obtain a reaction mixture system, N2 was introduced and vacuumed, and this process was repeated three times to remove oxygen in the system, and then the reaction mixture system was placed in a 70°C oil bath pot for 6 hours. After the reaction was completed, the crude product was precipitated in methanol for the first time, and the precipitate was filtered out. Subsequently, tetrahydrofuran was added to the precipitate to obtain a mixed solution, and methanol was added to the mixed solution for the second precipitation. The operation of adding methanol from the first precipitation to the second precipitation was repeated 3 times to remove the unreacted raw materials in the system, and finally the precipitate was dried in a 60°C oven to constant weight to obtain 46.88 g of amino-terminated polystyrene.

[0116] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0117] PC resin: 63.4wt%, 634g; ABS resin: 34.2wt%, 342g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; PS-NH2: 1.0wt%, 10g; ZeMac: 1.0wt%, 10g.

[0118] (1) Before melt extrusion, ABS resin, ZeMac, PS-NH2 and antioxidant were dried in an oven at 80°C for 4 h, and PC resin was dried in an oven at 120°C for 4 h. Weigh 634 g of the dried PC resin; 342 g of ABS resin; 4 g of antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); 10 g of PS-NH2 prepared above; and 10 g of ZeMac.

[0119] (2) Add the dried ZeMac, PC resin (polycarbonate), PS-NH2, and antioxidant (2.6 g) into a high-speed mixer according to the formula ratio and mix evenly to obtain a first mixed material.

[0120] (3) Add the first mixed material into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32rpm, the main screw speed to 80rpm, and obtain PC / ZeMac / PS-NH2 masterbatch through melt blending, cooling, and granulation.

[0121] (4) The dried ABS resin and antioxidant (1.4 g) were mixed with PC / ZeMac / PS-NH2 masterbatch in a high-speed mixer according to the formula ratio to obtain a second mixed material, which was added to an extruder and the temperature of the extruder was set to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. The feed screw speed was set to 32 rpm, the main screw speed was set to 80 rpm, and a high-toughness and fatigue-resistant PC / ABS alloy was obtained through melt blending, cooling, and granulation.

[0122] Comparative Example 5

[0123] The formula and preparation method of high-toughness and fatigue-resistant PC / ABS alloy are as follows:

[0124] PC resin: 64.1wt%, 641g; ABS resin: 34.5wt%, 345g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; ZeMac: 1.0wt%, 10g.

[0125] (1) Before melt extrusion, the ABS resin, ZeMac and antioxidant were dried in an oven at 80°C for 4 h, and the PC resin was dried in an oven at 120°C for 4 h. Weigh 641 g of the dried PC resin; 345 g of the ABS resin; 4 g of the antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); and 10 g of ZeMac, and add the dried raw materials into a high-speed mixer according to the formula ratio and mix them evenly.

[0126] (2) Add the uniformly mixed raw materials obtained in step (1) into an extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature: 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature: 245°C, zone 9 temperature: 240°C, zone 10 temperature: 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain a high-toughness and fatigue-resistant PC / ABS composite material through melt blending, cooling, and granulation.

[0127] Comparative Example 6

[0128] The formula and preparation method of PC / ABS alloy are as follows:

[0129] PC resin: 64.7wt%, 647g; ABS resin: 34.9wt%, 349g; antioxidant (antioxidant 1010 and antioxidant 168): 0.4wt%, 4g.

[0130] (1) Before melt extrusion, the PC resin was dried in an oven at 120°C for 4 h, and the ABS resin and antioxidant were dried in an oven at 80°C for 4 h. Weigh 647 g of the dried PC resin; 349 g of the ABS resin; and 4 g of the antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1) and add the dried raw materials into a high-speed mixer according to the formula ratio and mix them evenly.

[0131] (2) Add the uniformly mixed PC resin, ABS resin and antioxidant into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ABS alloy through melt blending, cooling and granulation.

[0132] Comparative Example 7

[0133] The formula and preparation method of PC / ABS / SMA alloy are as follows:

[0134] PC resin: 64.1wt%, 641g; ABS resin: 34.5wt%, 345g; Antioxidant (Antioxidant 1010 and Antioxidant 168): 0.4wt%, 4g; SMA (styrene-maleic anhydride copolymer): 1.0wt%, 10g.

[0135] (1) Before melt extrusion, the PC resin was dried in an oven at 120°C for 4 h, and the ABS resin, antioxidant and SMA were dried in an oven at 80°C for 4 h. Weigh 641 g of the dried PC resin; 345 g of the ABS resin; 4 g of the antioxidant (a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1); and 10 g of SMA (styrene-maleic anhydride copolymer), and add the dried raw materials into a high-speed mixer according to the formula ratio and mix them evenly.

[0136] (2) Add the uniformly mixed PC resin, ABS resin, SMA and antioxidant into the extruder and set the temperature of the extruder to: zone 1 temperature: 235°C, zone 2 temperature: 240°C, zone 3 temperature: 245°C, zone 4 temperature: 250°C, zone 5 temperature 250°C, zone 6 temperature: 250°C, zone 7 temperature: 250°C, zone 8 temperature 245°C, zone 9 temperature 240°C, zone 10 temperature 235°C. Set the feed screw speed to 32 rpm, the main screw speed to 80 rpm, and obtain PC / ABS alloy through melt blending, cooling and granulation.

[0137] Example performance test results

[0138] Performance test: With reference to the national standards "GB / T1043 Determination of impact properties of simply supported beams of plastics" and "GB / T1040 Determination of tensile properties of plastics", the tensile strength, impact strength, flexural strength, elongation at break and fatigue resistance of the PC / ABS alloy materials prepared in the examples and comparative examples were tested. The results are shown in Tables 1 and Figure 4 .

[0139] Table 1. PC / ABS alloy material performance test results

[0140]

[0141]

[0142] The above embodiments are only preferred schemes, and the present invention also includes other implementation modes. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-toughness and fatigue-resistant PC / ABS alloy, characterized in that: The high-toughness and fatigue-resistant PC / ABS alloy is prepared from the following raw material composition in parts by weight: 62-64 parts of polycarbonate, 33-35 parts of acrylonitrile-butadiene-styrene copolymer, 1.0-2.0 parts of ZeMac, 0.1-1.0 parts of amino-terminated polystyrene polymer, and 0.1-0.4 parts of antioxidant.

2. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 1, characterized in that: The amino-terminated polystyrene polymer is copolymerized by styrene, an initiator and a chain transfer agent, and the mass ratio of the styrene, the initiator and the chain transfer agent is 14-17:1:1-2.

3. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 2, characterized in that: The initiator is one or more of 2,2-azobisisobutyronitrile and 4,4-azobistetracyanovaleric acid.

4. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 2, characterized in that: The chain transfer agent is mercaptoethylamine.

5. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 1, characterized in that: The antioxidant is a compound formed by compounding a hindered phenol antioxidant and a phosphite antioxidant.

6. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 5, characterized in that: The antioxidant is a composition in which the mass ratio of antioxidant 1010 to antioxidant 168 is 1:1-1.

5.

7. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 2, characterized in that: The amino-terminated polystyrene polymer is prepared as follows: taking a formula amount of styrene, an initiator and a chain transfer agent and uniformly dispersing them in an organic solvent A to obtain a reaction mixture system; placing the mixture system at a temperature of 60 to 90° C. for polymerization reaction for 4 to 8 hours under nitrogen protection to obtain a crude product; adding the crude product to an organic solvent B for a first precipitation; taking the precipitate and adding an organic solvent C for dissolution to obtain a mixed solution; adding the mixed solution to an organic solvent B for a second precipitation; repeating the operation of adding organic solvent B from the first precipitation to the second precipitation 2 to 4 times, filtering, removing the filtrate to obtain a final precipitate, and drying to obtain the amino-terminated polystyrene polymer.

8. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 7, characterized in that: The organic solvent A is one or more of 1,4-dioxane and tetrahydrofuran.

9. The high-toughness and fatigue-resistant PC / ABS alloy according to claim 7, characterized in that: The organic solvent B is one or more of methanol and ethanol, and the organic solvent C is one or more of 1,4-dioxane and tetrahydrofuran.

10. A method for preparing a high-toughness and fatigue-resistant PC / ABS alloy as claimed in any one of claims 1 to 9, characterized in that: The preparation method is as follows: (1) drying polycarbonate, acrylonitrile-butadiene-styrene copolymer, ZeMac, amino-terminated polystyrene polymer, and antioxidant to remove moisture; (2) taking 62-64 parts of the dried polycarbonate obtained in step (1), 33-35 parts of acrylonitrile-butadiene-styrene copolymer, 1.0-2.0 parts of ZeMac, 0.1-1.0 parts of amino-terminated polystyrene polymer, and 0.1-0.4 parts of antioxidant; (3) taking 60%-70% of the antioxidant formula amount by weight, mixing it with the formula amount of polycarbonate and the formula amount of ZeMac to obtain a first mixed material, adding the first mixed material into a twin-screw extruder, and performing a first melt granulation to obtain a masterbatch under the conditions of a temperature of 220-260° C., a main feeding screw speed of 20-50 rpm, and a main screw speed of 60-100 rpm; (4) The masterbatch described in step (3) is mixed with the remaining antioxidants, a formula amount of acrylonitrile-butadiene-styrene copolymer, and a formula amount of amino-terminated polystyrene polymer to obtain a second mixed material, and the second mixed material is added to a twin-screw extruder, and a second extrusion melt granulation is performed under the conditions of a temperature of 220-260° C., a main feeding screw speed of 20-50 rpm, and a main screw speed of 60-100 rpm to obtain a high-toughness and fatigue-resistant PC / ABS alloy.

Images