An ABS composite material and a preparation method thereof

Abstract

The present invention relates to an ABS composite material and a preparation method thereof, belonging to the technical field of polymer materials. The present invention is obtained by modifying ABS and simultaneously blending it with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene; in the present invention, sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene are blended with modified ABS powder, increasing the stiffness and strength of the ABS composite material; through fiber fracture, fiber pull-out, and the expansion of matrix cracks, the impact toughness of the ABS material is enhanced, achieving the effect of dissipating impact energy, and also improving the durability and lifespan of ABS products; ABS is modified to form modified ABS powder, improving the bonding force between modifier particles and fibers, enabling the ABS composite material to have good toughness, with significant improvement in mechanical properties. At the same time, the toughness, stiffness, and hardness of the products made of ABS are also improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and specifically relates to an ABS composite material and a preparation method thereof. Background Art

[0002] Acrylonitrile-butadiene-styrene copolymer (ABS) is a thermoplastic polymer material with high strength, good toughness, and easy processing and molding. ABS is a terpolymer of acrylonitrile, 1,3-butadiene, and styrene. It can perform normally in an environment of -25°C to 60°C, and has good moldability. The products processed have a smooth surface, are easy to dye and electroplate. Moreover, it can be blended with a variety of resins to form blends. ABS is one of the most produced general plastics at present, having excellent mechanical properties, surface hardness, surface gloss, and a low molding shrinkage rate, and is widely used in industries such as household appliances, packaging, construction, toys, automobiles, and automotive accessories. Since ABS contains side phenyl groups, cyano groups, and unsaturated double bonds, it has good compatibility with many polymers, which creates favorable conditions for ABS blending. However, there is still a large room for improvement in the mechanical properties such as its strength. Enhancing its mechanical properties helps to further expand the scope of application of ABS composite materials. Summary of the Invention

[0003] The present invention relates to an ABS composite material and a preparation method thereof, belonging to the technical field of polymer materials. The present invention is prepared by modifying ABS and simultaneously blending it with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene; this composite material has good toughness, has a significant improvement in mechanical properties, and has a wide range of applicability; in the present invention, sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene are blended with modified ABS powder. Within the scope provided by the present invention, various fibers are intertwined with each other in the matrix, increasing the stiffness of the ABS composite material; the enhancement of its impact toughness is also mainly achieved through three mechanisms: fiber fracture, fiber pull-out, and matrix crack propagation, achieving the effect of dissipating impact energy; in the present invention, ABS is modified to form modified ABS powder, improving the binding force between modifier particles and fibers, thereby improving the performance of the blend.

[0004] The object of the present invention can be achieved by the following technical solutions:

[0005] A preparation method of an ABS composite material includes the following operating steps:

[0006] (1) Prepare a mixed solution A of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan;

[0007] (2) Take sodium pyrophosphate and glucose, add deionized water to dissolve, then add ferrous sulfate solution, polybutadiene latex and cumene hydroperoxide, add deionized water to dissolve completely to obtain mixture B;

[0008] (3) Add the mixture A prepared in (1) to mixture B, and raise the temperature to 65 °C for reaction under vacuum;

[0009] (4) After the addition of mixture A is completed, add additional cumene hydroperoxide and continue the reaction for 1 - 1.5 h, add an antioxidant, and stop the reaction after 0.2 - 0.5 h to obtain an emulsion;

[0010] (5) Demulsify, wash, dehydrate, and dry the emulsion obtained after the reaction to obtain modified ABS powder;

[0011] (6) Melt - blend the modified ABS powder with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene to obtain an ABS composite material.

[0012] As a preferred embodiment of the present invention, the dosage ratio of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert - dodecyl mercaptan described in (1) is 60 - 68 g: 20 - 25 g: 2 g: 0.2 - 0.3 g: 0.3 - 0.5 mL.

[0013] As a preferred embodiment of the present invention, the dosage ratio of sodium pyrophosphate, glucose, ferrous sulfate solution, polybutadiene latex, and cumene hydroperoxide described in (2) is 1 g: 0.8 - 1 g: 15 - 20 mL: 400 - 420 g: 0.1 - 0.2 mL.

[0014] As a preferred embodiment of the present invention, the concentration of the ferrous sulfate solution described in (2) is 0.8 - 1 mg / mL.

[0015] As a preferred embodiment of the present invention, in (3), in the mixture B and mixture A, control the mass ratio of glucose in mixture B to glycidyl methacrylate in mixture A to be 1: 4 - 5.

[0016] As a preferred embodiment of the present invention, the mass ratio of cumene hydroperoxide described in (4) to cumene hydroperoxide described in (2) is 1: 0.8 - 1.2.

[0017] As a preferred embodiment of the present invention, the sisal fiber described in (6) also needs to be pretreated, including the following operations:

[0018] Dry the sisal fiber, crush it, moisten it with ethanol, add a silane coupling agent while stirring, take it out after impregnation for 0.5 - 1 h, dry it, and seal it for standby after pulverization.

[0019] As a preferred embodiment of the present invention, the long glass fibers and carbon fibers described in (6) also need to be pretreated, including the following operations:

[0020] Soak the long glass fibers and carbon fibers in an acetone solution for 18 - 24 h, then impregnate them with a phosphoric acid solution for 2 - 3 h. At room temperature, immerse the impregnated long glass fibers and carbon fibers in a mixed solution of a silane coupling agent and an ethanol solution for 3 h, wash and dry them for standby;

[0021] Among them, the volume ratio of the silane coupling agent to the ethanol solution is 1∶480 - 500.

[0022] As a preferred embodiment of the present invention, the mass ratio of the modified ABS powder described in (6) to sisal fibers, carbon fibers, long glass fibers, and copolymerized polypropylene is 36 - 42:5 - 8:5 - 10:40 - 45:5.

[0023] The ABS composite material prepared by the above preparation method.

[0024] Advantages of the present invention:

[0025] 1. The present invention provides an ABS composite material, which is prepared by modifying ABS and blending it with sisal fibers, carbon fibers, long glass fibers, and copolymerized polypropylene; this composite material has good toughness, significantly improved mechanical properties, and wide applicability.

[0026] 2. In the present invention, sisal fibers, carbon fibers, long glass fibers, and copolymerized polypropylene are blended with the modified ABS powder. Within the range provided by the present invention, various fibers are intertwined with each other in the matrix, so that greater strength is required for the peeling or breaking of the fibers, thus increasing the stiffness of the ABS composite material; the enhancement of its impact toughness is also mainly achieved through three mechanisms: fiber fracture, fiber pull - out, and matrix crack propagation, achieving the effect of dissipating impact energy, and also improving the durability and lifespan of ABS products.

[0027] 3. In the present invention, ABS is modified to form a modified ABS powder. GMA introduces epoxy groups into ABS, and the surface of sisal fibers is covered with abundant hydroxyl groups. The hydroxyl groups and epoxy groups can undergo a chemical reaction in a high - temperature molten state, improving the bonding force between the modifier particles and the fibers, thereby improving the performance of the blend. Specific embodiments

[0028] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0029] Example 1

[0030] An ABS composite material is prepared by the following preparation method:

[0031] (1) Prepare a mixed solution A of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan;

[0032] Among them, the dosage ratio of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan is 60g:20g:2g:0.2g:0.3mL;

[0033] (2) Take sodium pyrophosphate and glucose, add deionized water to dissolve, then add a ferrous sulfate solution with a concentration of 0.8mg / mL, polybutadiene latex, and cumene hydroperoxide, and add deionized water to dissolve completely to obtain a mixed solution B;

[0034] Among them, the dosage ratio of sodium pyrophosphate, glucose, ferrous sulfate solution, polybutadiene latex, and cumene hydroperoxide is 1g:0.8g:15mL:400g:0.1mL;

[0035] (3) Gradually add the mixed solution A prepared in (1) dropwise to the mixed solution B, and raise the temperature to react at 65°C under vacuum; control the mass ratio of glucose in the mixed solution B to glycidyl methacrylate in the mixed solution A to be 1:4;

[0036] (4) After the dropwise addition of the mixed solution A is completed, add additional cumene hydroperoxide and continue to react for 1h, add an antioxidant, and stop the reaction after 0.2h to obtain an emulsion;

[0037] Among them, the mass ratio of the cumene hydroperoxide in (4) to the cumene hydroperoxide in (2) is 1:0.8;

[0038] (5) Demulsify, wash, dehydrate, and dry the emulsion obtained after the reaction to obtain modified ABS powder;

[0039] (6) Melt-blend the modified ABS powder with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene to obtain an ABS composite material; the mass ratio of the modified ABS powder to sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene is 36:5:5:40:5.

[0040] The sisal fiber also needs to be pretreated, including the following operations:

[0041] The sisal fiber is dried in a vacuum drying oven, crushed, wetted with ethanol, and while stirring, 3% by mass of KH550 silane coupling agent based on the mass of the sisal fiber is added. After impregnation for 0.5 h, it is taken out, dried in a vacuum drying oven at 70 °C, pulverized, and then sealed for standby;

[0042] The long glass fiber and carbon fiber also need to be pretreated, including the following operations:

[0043] The long glass fiber and carbon fiber are soaked in an acetone solution for 18 h, then ultrasonically impregnated with a phosphoric acid solution with a mass concentration of 65% for 2 h. At room temperature, the impregnated long glass fiber and carbon fiber are ultrasonically impregnated in a mixed solution of KH550 silane coupling agent and an ethanol solution with a volume fraction of 95% for 3 h, washed and dried for standby; the volume ratio of the silane coupling agent to the ethanol solution is 1:480.

[0044] Example 2

[0045] An ABS composite material is prepared by the following preparation method:

[0046] (1) Prepare a mixed solution A of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan;

[0047] Among them, the dosage ratio of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan is 62 g:21 g:2 g:0.22 g:0.35 mL;

[0048] (2) Take sodium pyrophosphate and glucose, add deionized water to dissolve, then add a ferrous sulfate solution with a concentration of 0.85 mg / mL, polybutadiene latex, and cumene hydroperoxide, and add deionized water to dissolve completely to prepare a mixed solution B;

[0049] Among them, the dosage ratio of sodium pyrophosphate, glucose, ferrous sulfate solution, polybutadiene latex, and cumene hydroperoxide is 1 g:0.85 g:156 mL:405 g:0.12 mL;

[0050] (3) Dropwise add the mixed solution A prepared in (1) to the mixed solution B, and raise the temperature under vacuum to react at 65 °C; control the mass ratio of glucose in the mixed solution B to glycidyl methacrylate in the mixed solution A to be 1:4.2;

[0051] (4) After the dropwise addition of the mixed solution A is completed, add cumene hydroperoxide to continue the reaction for 1.1 h, add an antioxidant, and stop the reaction after 0.3 h to obtain an emulsion;

[0052] Among them, the mass ratio of the cumene hydroperoxide described in (4) to the cumene hydroperoxide described in (2) is 1:0.9;

[0053] (5) Demulsify, wash, dehydrate, and dry the emulsion obtained after the reaction to obtain modified ABS powder;

[0054] (6) Melting and blending the modified ABS powder with sisal fiber, carbon fiber, long glass fiber, and copolypropylene to obtain an ABS composite material; the mass ratio of the modified ABS powder to sisal fiber, carbon fiber, long glass fiber, and copolypropylene is 37.5:6:6:41:5.

[0055] The sisal fiber also needs to be pretreated, including the following operations:

[0056] Dry the sisal fiber in a vacuum drying oven, crush it, moisten it with ethanol, add KH550 silane coupling agent accounting for 3% of the mass of the sisal fiber while stirring, take it out after impregnation for 0.6 h, dry it in a vacuum drying oven at 72 °C, and seal it for use after pulverization;

[0057] The long glass fiber and carbon fiber also need to be pretreated, including the following operations:

[0058] Soak the long glass fiber and carbon fiber in acetone solution for 20 h, then ultrasonically impregnate them with a phosphoric acid solution with a mass concentration of 65% for 2.2 h. At room temperature, immerse the impregnated long glass fiber and carbon fiber in a mixed solution of KH550 silane coupling agent and ethanol solution with a volume fraction of 95%, ultrasonically impregnate them for 3 h, wash and dry them for standby; the volume ratio of the silane coupling agent to the ethanol solution is 1∶485.

[0059] Example 3

[0060] An ABS composite material is prepared by the following preparation method:

[0061] (1) Prepare a mixed solution A of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan;

[0062] Among them, the dosage ratio of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan is 64 g:22.5 g:2 g:0.25 g:0.4 mL;

[0063] (2) Take sodium pyrophosphate and glucose, add deionized water to dissolve, then add a ferrous sulfate solution with a concentration of 0.9 mg / mL, polybutadiene latex, and cumene hydroperoxide, and add deionized water to dissolve completely to obtain a mixed solution B;

[0064] Among them, the dosage ratio of sodium pyrophosphate, glucose, ferrous sulfate solution, polybutadiene latex, and cumene hydroperoxide is 1 g: 0.9 g: 17 mL: 410 g: 0.15 mL;

[0065] (3) Slowly add dropwise the mixed solution A prepared in (1) to the mixed solution B, and raise the temperature to react at 65 °C under vacuum; control the mass ratio of glucose in the mixed solution B to glycidyl methacrylate in the mixed solution A to be 1:4.

[0066] (4) After the addition of the mixed solution A is completed, supplement cumene hydroperoxide and continue to react for 1.3 h, add an antioxidant, and stop the reaction after 0.4 h to obtain an emulsion;

[0067] Among them, the mass ratio of the cumene hydroperoxide described in (4) to the cumene hydroperoxide described in (2) is 1:1;

[0068] (5) Demulsify, wash, dehydrate, and dry the emulsion obtained after the reaction to obtain modified ABS powder;

[0069] (6) Melt-blend the modified ABS powder with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene to obtain an ABS composite material; the mass ratio of the modified ABS powder to sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene is 39: 6.5: 8: 42.5: 5.

[0070] The sisal fiber needs to be pretreated, including the following operations:

[0071] Dry the sisal fiber in a vacuum drying oven, crush it, moisten it with ethanol, add 3% by mass of KH550 silane coupling agent to the sisal fiber while stirring, take it out after impregnating for 0.7 h, dry it in a vacuum drying oven at 75 °C, and seal it for use after pulverizing;

[0072] The long glass fiber and carbon fiber also need to be pretreated, including the following operations:

[0073] Soak the long glass fiber and carbon fiber in acetone solution for 22 h, then ultrasonically impregnate them with a phosphoric acid solution with a mass concentration of 65% for 2.5 h. At room temperature, immerse the impregnated long glass fiber and carbon fiber in a mixed solution of KH550 silane coupling agent and ethanol solution with a volume fraction of 95%, ultrasonically impregnate them for 3 h, wash and dry them for standby; the volume ratio of the silane coupling agent to the ethanol solution is 1:490.

[0074] Example 4

[0075] An ABS composite material is prepared by the following preparation method:

[0076] (1) Prepare a mixed solution A of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan;

[0077] Among them, the dosage ratio of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan is 66:24g:2g:0.28g:0.45mL;

[0078] (2) Take sodium pyrophosphate and glucose, add deionized water to dissolve, then add a ferrous sulfate solution with a concentration of 0.95mg / mL, polybutadiene latex, and cumene hydroperoxide, and add deionized water to dissolve completely to obtain a mixed solution B;

[0079] Among them, the dosage ratio of sodium pyrophosphate, glucose, ferrous sulfate solution, polybutadiene latex, and cumene hydroperoxide is 1g:0.95g:18mL:415g:0.18mL;

[0080] (3) Gradually add the mixed solution A prepared in (1) dropwise to the mixed solution B, and raise the temperature to 65°C under vacuum for reaction; control the mass ratio of glucose in the mixed solution B to glycidyl methacrylate in the mixed solution A to be 1:4.8;

[0081] (4) After the dropwise addition of the mixed solution A is completed, add additional cumene hydroperoxide and continue the reaction for 1.4h, add an antioxidant, and stop the reaction after 0.5h to obtain an emulsion;

[0082] Among them, the mass ratio of the cumene hydroperoxide described in (4) to the cumene hydroperoxide described in (2) is 1:1.1;

[0083] (5) Demulsify, wash, dehydrate, and dry the emulsion obtained after the reaction to obtain modified ABS powder;

[0084] (6) Melt-blend the modified ABS powder with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene to obtain an ABS composite material; the mass ratio of the modified ABS powder to sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene is 40:7:9:43:5.

[0085] The sisal fiber needs to be pretreated, including the following operations:

[0086] Dry the sisal fiber in a vacuum drying oven, crush it, moisten it with ethanol, add KH550 silane coupling agent accounting for 3% of the mass of the sisal fiber while stirring, take it out after impregnation for 0.8h, dry it in a vacuum drying oven at 78°C, and seal it for later use after pulverization;

[0087] The long glass fiber and carbon fiber also need to be pretreated, including the following operations:

[0088] Soak the long glass fiber and carbon fiber in acetone solution for 18 - 24 h, then ultrasonically impregnate them with phosphoric acid solution with a mass concentration of 65% for 2.8 h. At room temperature, immerse the impregnated long glass fiber and carbon fiber in a mixed solution of KH550 silane coupling agent and ethanol solution with a volume fraction of 95% for 3 h, wash and dry them for standby; the volume ratio of the silane coupling agent to the ethanol solution is 1:495.

[0089] Example 5

[0090] An ABS composite material is prepared by the following preparation method:

[0091] (1) Prepare a mixed solution A of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan;

[0092] Among them, the dosage ratio of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan is 68 g:25 g:2 g:0.3 g:0.5 mL;

[0093] (2) Take sodium pyrophosphate and glucose, add deionized water to dissolve, then add a ferrous sulfate solution with a concentration of 1 mg / mL, polybutadiene latex, and cumene hydroperoxide, and add deionized water to dissolve completely to obtain a mixed solution B;

[0094] Among them, the dosage ratio of sodium pyrophosphate, glucose, ferrous sulfate solution, polybutadiene latex, and cumene hydroperoxide is 1 g:1 g:20 mL:420 g:0.2 mL;

[0095] (3) Dropwise add the mixed solution A prepared in (1) to the mixed solution B, and raise the temperature to 65 °C under vacuum for reaction; control the mass ratio of glucose in the mixed solution B to glycidyl methacrylate in the mixed solution A to be 1:5;

[0096] (4) After the dropwise addition of the mixed solution A is completed, add cumene hydroperoxide to continue the reaction for 1.5 h, add an antioxidant, and stop the reaction after 0.5 h to obtain an emulsion;

[0097] Among them, the mass ratio of the cumene hydroperoxide in (4) to the cumene hydroperoxide in (2) is 1:1.2;

[0098] (5) Demulsify, wash, dehydrate, and dry the emulsion obtained after the reaction to obtain modified ABS powder;

[0099] (6) Melt-blend the modified ABS powder with sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene to obtain an ABS composite material; the mass ratio of the modified ABS powder to sisal fiber, carbon fiber, long glass fiber, and copolymerized polypropylene is 42:8:10:45:5.

[0100] The sisal fiber also needs to be pretreated, including the following operations:

[0101] The sisal fiber is dried in a vacuum drying oven, crushed, wetted with ethanol, and 3% by mass of KH550 silane coupling agent is added while stirring. After impregnation for 1 h, it is taken out and dried in a vacuum drying oven at 80 °C, pulverized, and sealed for standby;

[0102] The long glass fiber and carbon fiber also need to be pretreated, including the following operations:

[0103] The long glass fiber and carbon fiber are soaked in acetone solution for 24 h, and then ultrasonically impregnated with a phosphoric acid solution with a mass concentration of 65% for 3 h. At room temperature, the impregnated long glass fiber and carbon fiber are ultrasonically impregnated in a mixed solution of KH550 silane coupling agent and ethanol solution with a volume fraction of 95% for 3 h, washed and dried for standby; the volume ratio of the silane coupling agent to the ethanol solution is 1:500.

[0104] Comparative Example 1

[0105] An ABS composite material, compared with Example 5, uses carbon fiber instead of sisal fiber, and the rest are the same as in Example 5.

[0106] Comparative Example 2

[0107] An ABS composite material, compared with Example 5, uses long glass fiber instead of carbon fiber, and the rest are the same as in Example 5.

[0108] Comparative Example 3

[0109] An ABS composite material, compared with Example 5, uses sisal fiber instead of long glass fiber, and the rest are the same as in Example 5.

[0110] Comparative Example 4

[0111] An ABS composite material, compared with Example 5, does not pretreat the sisal fiber, and the rest are the same as in Example 5.

[0112] Comparative Example 5

[0113] An ABS composite material, compared with Example 5, does not pretreat the long glass fiber and carbon fiber, and the rest are the same as in Example 5.

[0114] Comparative Example 6

[0115] An ABS composite material, compared with Example 5, does not modify the ABS, and the rest are the same as in Example 5. It is prepared by the following preparation method:

[0116] ABS powder is melt-blended with sisal fiber, carbon fiber, long glass fiber and polypropylene copolymer to obtain an ABS composite material; the mass ratio of the modified ABS powder to sisal fiber, carbon fiber, long glass fiber and polypropylene copolymer is 42:8:10:45:5.

[0117] The sisal fiber also needs to be pretreated, including the following operations:

[0118] The sisal fiber is dried in a vacuum drying oven, crushed, wetted with ethanol, and 3% of KH550 silane coupling agent based on the mass of the sisal fiber is added while stirring. After impregnation for 1 h, it is taken out and dried in a vacuum drying oven at 80 °C, pulverized and sealed for standby;

[0119] The long glass fiber and carbon fiber also need to be pretreated, including the following operations:

[0120] The long glass fiber and carbon fiber are soaked in acetone solution for 24 h, and then ultrasonically impregnated with a phosphoric acid solution with a mass concentration of 65% for 3 h. At room temperature, the impregnated long glass fiber and carbon fiber are ultrasonically impregnated in a mixed solution of KH550 silane coupling agent and ethanol solution with a volume fraction of 95% for 3 h, washed and dried for standby; the volume ratio of the silane coupling agent to the ethanol solution is 1:500.

[0121] The following tests are carried out on the ABS composite materials prepared in Examples 1-5 and Comparative Examples 1-6:

[0122] Test Example 1 Hardness test

[0123] The hardness of the ABS composite material is measured using a digital Shore hardness tester (Type D). Four positions of each sample are measured and the average value is taken. The results are shown in Table 1.

[0124] Test Example 2 Mechanical property test

[0125] Tensile property: Test according to ISO 527-2——2012, 1A type specimen, tensile rate 10 mm / min;

[0126] Flexural property: Test according to ISO 178——2019, test rate 2 mm / min;

[0127] Impact property: Test according to ISO 179-1—2010, 1 type specimen.

[0128] The obtained results are shown in Table 1.

[0129] Table 1

[0130]

[0131]

[0132] As can be seen from Table 1, the ABS composite materials prepared in Examples 1-5 of the method for preparing an ABS composite material provided by the present invention have good Shore hardness, tensile strength, flexural strength and impact strength, while the Shore hardness, tensile strength, flexural strength and impact strength of Comparative Examples 1-6 have decreased to varying degrees.

[0133] In the description of the specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0134] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A method for preparing an ABS composite material, characterized in that: The preparation method comprises the following steps: (1) preparing a mixed solution A of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide, and tert-dodecyl mercaptan; (2) sodium pyrophosphate and glucose are added to deionized water to dissolve, and then ferrous sulfate solution, polybutadiene latex and cumene hydroperoxide are added, and deionized water is added to dissolve completely to prepare a mixed solution B; (3) Adding the mixed solution A prepared in (1) to the mixed solution B, heating to 65° C. under vacuum to react; (4) After the addition of the mixed solution A is completed, cumene hydroperoxide is added to continue the reaction for 1-1.5 hours, an antioxidant is added, and the reaction is stopped after 0.2-0.5 hours to obtain an emulsion; (5) demulsifying, washing, dehydrating and drying the emulsion obtained after the reaction to obtain modified ABS powder; (6) melt-blending the modified ABS powder with sisal fiber, carbon fiber, long glass fiber and copolymerized polypropylene to prepare an ABS composite material; The sisal fiber described in (6) also needs to be pretreated, including the following operations: The sisal fibers are dried, crushed, moistened with ethanol, and a silane coupling agent is added while stirring. After soaking for 0.5-1h, the fibers are taken out, dried, crushed, and sealed for later use; The long glass fibers and carbon fibers described in (6) also need to be pretreated, including the following operations: Soak the long glass fiber and carbon fiber in an acetone solution for 18-24 hours, and then soak them in a phosphoric acid solution for 2-3 hours. At room temperature, soak the soaked long glass fiber and carbon fiber in a mixed solution of a silane coupling agent and an ethanol solution for 3 hours, wash and dry them for later use. Wherein, the volume ratio of the silane coupling agent to the ethanol solution is 1:480-500; The mass ratio of the modified ABS powder to sisal fiber, carbon fiber, long glass fiber and copolymerized polypropylene in (6) is 36-42:5-8:5-10:40-45:

5.

2. The method for preparing an ABS composite material according to claim 1, characterized in that: The usage ratio of styrene, acrylonitrile, glycidyl methacrylate, cumene hydroperoxide and tert-dodecyl mercaptan in (1) is 60-68 g: 20-25 g: 2 g: 0.2-0.3 g: 0.3-0.5 mL.

3. The method for preparing an ABS composite material according to claim 1, characterized in that: The dosage ratio of sodium pyrophosphate, glucose, ferrous sulfate solution, polybutadiene latex, and cumene hydroperoxide in (2) is 1g:0.8-1g:15-20mL:400-420g:0.1-0.2mL.

4. The method for preparing an ABS composite material according to claim 1, characterized in that: The concentration of the ferrous sulfate solution in (2) is 0.8-1 mg / mL.

5. The method for preparing an ABS composite material according to claim 1, characterized in that: In the mixed solution B and the mixed solution A described in (3), the mass ratio of glucose in the mixed solution B to glycidyl methacrylate in the mixed solution A is controlled to be 1:4-5.

6. The method for preparing an ABS composite material according to claim 1, characterized in that: The mass ratio of the cumene hydroperoxide described in (4) to the cumene hydroperoxide described in (2) is 1:0.8-1.

2.

7. An ABS composite material obtained by the preparation method according to any one of claims 1 to 6.

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