CN114031902A - Magnetic compound plastic alloy material and preparation method thereof - Google Patents
Magnetic compound plastic alloy material and preparation method thereof Download PDFInfo
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 64
- 239000000956 alloy Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 229920000642 polymer Polymers 0.000 claims abstract description 32
- 239000004005 microsphere Substances 0.000 claims abstract description 27
- 239000006247 magnetic powder Substances 0.000 claims abstract description 21
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- 238000000034 method Methods 0.000 claims abstract 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 claims description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 5
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- 239000009719 polyimide resin Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- PRWJPWSKLXYEPD-UHFFFAOYSA-N 4-[4,4-bis(5-tert-butyl-4-hydroxy-2-methylphenyl)butan-2-yl]-2-tert-butyl-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(C)CC(C=1C(=CC(O)=C(C=1)C(C)(C)C)C)C1=CC(C(C)(C)C)=C(O)C=C1C PRWJPWSKLXYEPD-UHFFFAOYSA-N 0.000 claims description 3
- -1 4-cyclohexyl Chemical group 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- AXTNPHLCOKUMDY-UHFFFAOYSA-N chromium cobalt Chemical compound [Co][Cr][Co] AXTNPHLCOKUMDY-UHFFFAOYSA-N 0.000 claims description 2
- 229940090961 chromium dioxide Drugs 0.000 claims description 2
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 claims description 2
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 239000002861 polymer material Substances 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 5
- 239000011368 organic material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000047 product Substances 0.000 description 10
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 8
- 238000002844 melting Methods 0.000 description 5
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- 229940037312 stearamide Drugs 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
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- 230000032683 aging Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
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- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000010292 electrical insulation Methods 0.000 description 1
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- 239000003562 lightweight material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000003647 oxidation Effects 0.000 description 1
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- 239000012466 permeate Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2251—Oxides; Hydroxides of metals of chromium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2289—Oxides; Hydroxides of metals of cobalt
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of organic materials, and particularly relates to a magnetic compound plastic alloy material and a preparation method thereof, wherein the magnetic compound plastic alloy material comprises, by weight, 20-30 parts of a magnetic compound, 78-40 parts of PP30, 30-40 parts of PET, 10-15 parts of a filler, 1-3 parts of a coupling agent, 2-5 parts of a compatilizer and 0.2-0.6 part of an antioxidant; the magnetic compound is a magnetic polymer microsphere, and the mass ratio of the polymer compound to the magnetic powder in the magnetic polymer microsphere is 2-4: 1. According to the invention, the ratio of the magnetic powder to the polymer material is controlled, the magnetic powder is wrapped in the polymer material in advance, and then the magnetic powder and the resin are mixed through the maleic anhydride grafted compatilizer, so that the compatibility is better, and the mechanical property and the processing property of the plastic alloy material can be improved; the magnetic compound plastic alloy material prepared by the method has the advantages of good comprehensive performance, light weight and low price, and can be widely applied to novel materials such as light-weight and high-performance microwave electronic components.
Description
Technical Field
The invention belongs to the technical field of organic materials, and particularly relates to a magnetic compound plastic alloy material and a preparation method thereof.
Background
Magnetic plastics are a novel high-molecular functional material developed in the seventies and are one of important basic materials in the field of modern science and technology. With the development of science and technology, more and more devices using magnetic plastics are used in daily life, such as audio and video equipment, household appliances, computers, and mass use in the fields of office and automobile industries, so that the requirement on the magnetic plastics is higher and higher.
At present, a great amount of magnetic plastics are mainly obtained by directly adding magnetic powder into a resin material, but due to the addition of the magnetic powder and different processing methods, the obtained magnetic plastics are heavier, and the comprehensive properties, such as mechanical properties, processing properties, heat resistance and the like, of the magnetic plastics cannot meet the requirements of novel materials such as light-weight and high-performance microwave electronic components.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a magnetic compound plastic alloy material and a preparation method thereof.
In order to achieve the purpose, the plastic alloy material comprises, by weight, 20-30 parts of a magnetic compound, 30-40 parts of PP, 30-40 parts of PET, 10-15 parts of a filler, 1-3 parts of a coupling agent, 2-5 parts of a compatilizer and 0.2-0.6 part of an antioxidant;
the magnetic compound is a magnetic polymer microsphere, and the mass ratio of the polymer compound to the magnetic powder in the magnetic polymer microsphere is 2-4: 1.
According to the technical scheme, the magnetic polymer microspheres are introduced into the plastic alloy material, so that the plastic alloy material is good in compatibility, the obtained magnetic compound plastic alloy material is good in mechanical property and processability, and has certain magnetism, light weight and low price by controlling the raw material ratio of the magnetic polymer microspheres.
Further, in the above technical solution, the polymer compound is any one of polyimide resin or 4-cyclohexyl resin; the magnetic powder is one or more of ferric oxide, chromium dioxide or cobalt-ferric oxide.
Further, in the above technical scheme, the particle size of the magnetic polymer microsphere is 0.5-2 μm. In the technical scheme, the particle size of the microspheres is controlled to be 0.5-2 mu m, so that uniform mixing in subsequent processing is facilitated, and the obtained product has better quality.
Further, in the above technical scheme, the filler is any one of mica powder, silica and bentonite; the coupling agent is a silane coupling agent. In the technical scheme, a certain amount of inorganic filler is added, so that the mechanical property and the high-temperature resistance of the plastic can be improved; the silane coupling agent can enhance the bonding strength between each material and resin, improve the comprehensive performance of the plastic, and simultaneously can permeate other media, thereby being beneficial to improving the aging resistance and the electrical insulation performance of the plastic product. Specifically, the silane coupling agent may be any one of KH550, KH560 or KH 570.
Further, in the above technical scheme, the compatibilizer is a maleic anhydride grafted compatibilizer, and includes any one of ABS-g-MAH, PE-g-MAH, and PP-g-MAH. In the technical scheme, the maleic anhydride grafted compatilizer is adopted to increase the compatibility between polymers, increase the bonding force, enhance the stability, improve the compatibility between inorganic filler and organic resin and improve the tensile strength and impact strength of plastic products.
Further, in the above technical scheme, the antioxidant is one or more of antioxidant 1010, antioxidant CA or antioxidant 164. The antioxidant in the technical scheme can effectively delay or inhibit the oxidation of the polymer so as to prevent the aging of the polymer, has good thermal stability, and can prolong the service life of plastic products.
The invention also provides a preparation method of the magnetic compound plastic alloy material, which comprises the following specific steps:
s1, preparing a magnetic compound: adding 20-40 parts of a high molecular compound into a reactor according to the weight part ratio of the raw materials, adding 40-50 parts of pyromellitic dianhydride under the nitrogen environment, heating to 110-;
s2, preparing a magnetic compound plastic alloy material: according to the raw material formula proportion, firstly adding PP, PET and a filler into a reactor, heating to 60-80 ℃, stirring for 30-60min, then adding the magnetic polymer microspheres, the coupling agent, the compatilizer and the antioxidant in S1 into the reactor, mixing at a high speed for 30-50min in a nitrogen environment, adding the mixture into a double-screw extruder, and carrying out melt plasticizing, mixing extrusion and drying to obtain the magnetic compound plastic alloy material.
Further, in the above technical scheme, in S1, the temperature rise is increased at a speed of 3-4 ℃/min, and the stirring speed is 400-600 r/min.
Further, in the above technical solution S2, the speed of the high-speed mixing is 1500-2500 r/min.
Further, in the above technical solution, in S2, the twin-screw extrusion temperature is 220-280 ℃.
The invention has the beneficial effects that:
according to the invention, the proportion of the magnetic powder to the high polymer material is controlled, the magnetic powder is wrapped in the high polymer material in advance, so that the magnetic compound of the magnetic high polymer microsphere is obtained, the weight is light, and the weight of the plastic alloy material can be reduced; meanwhile, the polymer material on the surface of the magnetic polymer microsphere is mixed with the resin through the maleic anhydride grafted compatilizer, so that the compatibility is better, and the mechanical property and the processing property of the plastic alloy material can be improved; the obtained magnetic compound plastic alloy material has good comprehensive performance, light weight and low price, and can be widely applied to novel materials such as light-weight and high-performance microwave electronic components.
Detailed Description
The experimental procedures in the following examples are conventional unless otherwise specified. The raw materials in the following examples are all commercially available products and are commercially available, unless otherwise specified.
The present invention is described in further detail below with reference to examples:
example 1
A preparation method of a magnetic compound plastic alloy material comprises the following specific steps:
s1, preparing a magnetic compound: adding 20 parts of polyimide resin into a reactor according to the weight part ratio of the raw materials, adding 40 parts of pyromellitic dianhydride under the nitrogen environment, heating to 110 ℃, stirring for 40min at the speed of 400r/min, then adding 10 parts of magnetic powder and 0.2 part of stearamide, continuously stirring for 30min at the speed of 400r/min, depositing, cooling to normal temperature, drying and crushing to obtain magnetic polymer microspheres with the particle size of 0.5-2 mu m;
s2, preparing a magnetic compound plastic alloy material: according to the raw material formula proportion, firstly adding 30 parts of PP, 40 parts of PET and 15 parts of mica powder into a reactor, heating to 60 ℃, stirring for 60min, then adding 20 parts of magnetic polymer microspheres, 1 part of KH550, 5 parts of ABS-g-MAH and 0.2 part of antioxidant CA in S1 into the reactor, mixing for 50min at a high speed of 1500r/min in a nitrogen environment, adding the mixture into a double-screw extruder, melting and plasticizing, mixing and extruding, wherein the extrusion temperature is 220 ℃ and 280 ℃, and drying to obtain the magnetic compound plastic alloy material.
Example 2
A preparation method of a magnetic compound plastic alloy material comprises the following specific steps:
s1, preparing a magnetic compound: adding 30 parts of polyimide resin into a reactor according to the weight part ratio of the raw materials, adding 45 parts of pyromellitic dianhydride under the nitrogen environment, heating to 120 ℃, stirring for 30min at the speed of 500r/min, then adding 10 parts of ferric oxide and 0.3 part of stearamide, continuously stirring for 25min at the speed of 500r/min, depositing, cooling to normal temperature, drying and crushing to obtain magnetic polymer microspheres with the particle size of 0.5-2 mu m;
s2, preparing a magnetic compound plastic alloy material: according to the raw material formula proportion, firstly adding 35 parts of PP, 35 parts of PET and 12 parts of silicon dioxide into a reactor, heating to 70 ℃, stirring for 50min, then adding 25 parts of magnetic polymer microspheres in S1, 2 parts of KH560, 3 parts of PP-g-MAH and 0.4 part of antioxidant 1010 into the reactor, mixing for 40min at a high speed of 2000r/min in a nitrogen environment, adding the mixture into a double-screw extruder, melting and plasticizing, mixing and extruding, wherein the extrusion temperature is 220 ℃ and 280 ℃, and drying to obtain the magnetic compound plastic alloy material.
Example 3
A preparation method of a magnetic compound plastic alloy material comprises the following specific steps:
s1, preparing a magnetic compound: adding 40 parts of 4-cyclohexyl resin into a reactor according to the weight part ratio of the raw materials, adding 50 parts of pyromellitic dianhydride under the nitrogen environment, heating to 130 ℃, stirring at the speed of 600r/min for 20min, then adding 10 parts of magnetic powder and 0.5 part of stearamide, continuously stirring at the speed of 600r/min for 20min, depositing, cooling to normal temperature, drying and crushing to obtain magnetic polymer microspheres with the particle size of 0.5-2 mu m;
s2, preparing a magnetic compound plastic alloy material: according to the raw material formula proportion, firstly adding 40 parts of PP, 30 parts of PET and 10 parts of bentonite into a reactor, heating to 80 ℃, stirring for 30min, then adding 30 parts of magnetic polymer microspheres, 3 parts of KH570, 2 parts of PE-g-MAH and 0.6 part of antioxidant 164 in S1 into the reactor, mixing for 30min at a high speed of 2500r/min in a nitrogen environment, adding the mixture into a double-screw extruder, melting and plasticizing, mixing and extruding, wherein the extrusion temperature is 220 ℃ and 280 ℃, and drying to obtain the magnetic compound plastic alloy material.
Comparative example 1
A preparation method of a magnetic compound plastic alloy material is the same as that in example 2, except that the mass ratio of the macromolecular compound to the magnetic powder in the magnetic macromolecular microspheres is 1: 1.
Comparative example 2
A preparation method of a magnetic compound plastic alloy material is the same as that in example 2, except that the mass ratio of the macromolecular compound to the magnetic powder in the magnetic macromolecular microspheres is 5: 1.
Comparative example 3
A preparation method of a magnetic compound plastic alloy material comprises the following specific steps:
according to the raw material formula proportion, firstly adding 35 parts of PP, 35 parts of PET and 12 parts of silicon dioxide into a reactor, heating to 70 ℃, stirring for 50min, then adding 25 parts of ferric oxide, 2 parts of KH560, 3 parts of PP-g-MAH and 0.4 part of antioxidant 1010 in S1 into the reactor, mixing for 40min at a high speed of 2000r/min in a nitrogen environment, adding the mixture into a double-screw extruder, melting and plasticizing, mixing and extruding, wherein the extrusion temperature is 220 ℃ and 280 ℃, and drying to obtain the magnetic compound plastic alloy material.
Comparative example 4
A preparation method of a magnetic compound plastic alloy material comprises the following specific steps:
s1, preparing a magnetic compound: adding 30 parts of polyimide resin into a reactor according to the weight part ratio of the raw materials, adding 10 parts of ferric oxide and 0.3 part of stearamide under the nitrogen environment, and stirring at the speed of 500r/min for 25min to obtain a magnetic compound;
s2, preparing a magnetic compound plastic alloy material: according to the raw material formula proportion, firstly adding 35 parts of PP, 35 parts of PET and 12 parts of silicon dioxide into a reactor, heating to 70 ℃, stirring for 50min, then adding 25 parts of magnetic compound, 2 parts of KH560, 3 parts of PP-g-MAH and 0.4 part of antioxidant 1010 in S1 into the reactor, mixing for 40min at a high speed of 2000r/min in a nitrogen environment, adding the mixture into a double-screw extruder, melting and plasticizing, mixing and extruding, wherein the extrusion temperature is 220 ℃ and 280 ℃, and drying to obtain the magnetic compound plastic alloy material.
Testing the performance of the magnetic compound plastic alloy material:
the magnetic compound plastic alloy materials prepared in examples 1 to 3 and comparative examples 1 to 4 were tested for tensile strength, elongation at break, and heat distortion temperature using ASTM standards, and the magnetic properties, density, and processability of the finished plastic products were measured, and the results are shown in table 1.
TABLE 1 test results table
As can be seen from the test results in Table 1, the magnetic compound plastic alloy materials prepared in examples 1-3 of the present invention have good mechanical properties, heat resistance, and processability, moderate magnetic permeability, low density, and portability.
Comparing example 2 with comparative examples 1 to 2, in comparative example 1, when too much magnetic powder is used, the density of the plastic product is increased, and the plastic product is not suitable for a novel material with light weight; in comparative example 2, when too little magnetic powder was used, the magnetic permeability was too low although the density was small and the weight was reduced.
In comparison with example 2 and comparative example 3, in comparative example 3, the inorganic magnetic powder is directly used, and the density of the plastic product is too high, so that the plastic product is not suitable for a novel light-weight material.
Comparing example 2 with comparative example 4, in comparative example 4, the magnetic polymer microspheres are not prepared, but directly mixed, and although the magnetic permeability and the density are moderate, the tensile strength and the elongation at break of the magnetic polymer microspheres are poorer than those of example 2.
In conclusion, the proportion of the magnetic powder and the high polymer material is controlled, the magnetic powder is wrapped in the high polymer material in advance, the magnetic compound of the magnetic high polymer microsphere is obtained, and the weight of the plastic alloy material can be reduced; meanwhile, the polymer material on the surface of the magnetic polymer microsphere is mixed with the resin through the maleic anhydride grafted compatilizer, so that the compatibility is better, and the mechanical property and the processing property of the plastic alloy material can be improved; the obtained magnetic compound plastic alloy material has good comprehensive performance, light weight and low price, and can be widely applied to novel materials such as light-weight and high-performance microwave electronic components.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.
Claims (10)
1. The magnetic compound plastic alloy material is characterized by comprising, by weight, 20-30 parts of a magnetic compound, 30-40 parts of PP, 30-40 parts of PET, 10-15 parts of a filler, 1-3 parts of a coupling agent, 2-5 parts of a compatilizer and 0.2-0.6 part of an antioxidant;
the magnetic compound is a magnetic polymer microsphere, and the mass ratio of the polymer compound to the magnetic powder in the magnetic polymer microsphere is 2-4: 1.
2. The magnetic compound plastic alloy material according to claim 1, wherein the polymer compound is any one of polyimide resin or 4-cyclohexyl resin; the magnetic powder is one or more of ferric oxide, chromium dioxide or cobalt-ferric oxide.
3. The magnetic compound plastic alloy material according to claim 1, wherein the magnetic polymer microsphere has a particle size of 0.5-2 μm.
4. The magnetic compound plastic alloy material according to claim 1, wherein the filler is any one of mica powder, silica, bentonite; the coupling agent is a silane coupling agent.
5. The magnetic compound plastic alloy material as claimed in claim 1, wherein the compatibilizer is maleic anhydride grafted compatibilizer, including any one of ABS-g-MAH, PE-g-MAH, PP-g-MAH.
6. The magnetic compound plastic alloy material as claimed in claim 1, wherein the antioxidant is one or more of antioxidant 1010, antioxidant CA or antioxidant 164.
7. The method for preparing a magnetic compound plastic alloy material according to any one of claims 1 to 6, characterized by comprising the following specific steps:
s1, preparing a magnetic compound: adding 20-40 parts of a high molecular compound into a reactor according to the weight part ratio of the raw materials, adding 40-50 parts of pyromellitic dianhydride under the nitrogen environment, heating to 110-;
s2, preparing a magnetic compound plastic alloy material: according to the raw material formula proportion, firstly adding PP, PET and a filler into a reactor, heating to 60-80 ℃, stirring for 30-60min, then adding the magnetic polymer microspheres, the coupling agent, the compatilizer and the antioxidant in S1 into the reactor, mixing at a high speed for 30-50min in a nitrogen environment, adding the mixture into a double-screw extruder, and carrying out melt plasticizing, mixing extrusion and drying to obtain the magnetic compound plastic alloy material.
8. The method as claimed in claim 1, wherein in S1, the temperature is increased at a rate of 3-4 ℃/min, and the stirring rate is 400-600 r/min.
9. The method as claimed in claim 1, wherein the high speed mixing speed in S2 is 1500-2500 r/min.
10. The method as claimed in claim 1, wherein the twin-screw extrusion temperature in S2 is 220-280 ℃.
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