CN116589795A - Modified polypropylene material and preparation method and application thereof - Google Patents
Modified polypropylene material and preparation method and application thereof Download PDFInfo
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- CN116589795A CN116589795A CN202310729098.3A CN202310729098A CN116589795A CN 116589795 A CN116589795 A CN 116589795A CN 202310729098 A CN202310729098 A CN 202310729098A CN 116589795 A CN116589795 A CN 116589795A
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 141
- 239000000463 material Substances 0.000 title claims abstract description 91
- -1 polypropylene Polymers 0.000 title claims abstract description 58
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000012745 toughening agent Substances 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 16
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 239000004611 light stabiliser Substances 0.000 claims abstract description 16
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- 230000003678 scratch resistant effect Effects 0.000 claims abstract description 16
- 239000001038 titanium pigment Substances 0.000 claims abstract description 16
- 229920002943 EPDM rubber Polymers 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 12
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 12
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 12
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000126 substance Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 238000005187 foaming Methods 0.000 description 5
- 239000004408 titanium dioxide Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- 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
- C08L23/14—Copolymers of propene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
-
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application provides a modified polypropylene material, a preparation method and application thereof, wherein the material comprises the following components: 40-75% of copolymerized PP, 10-30% of homo-polymerized PP, 3-20% of toughening agent, 1-5% of scratch resistant agent, 0.2-5% of compatilizer, 1-3% of titanium pigment, 0.2-2% of lubricant, 0.2-1.5% of light stabilizer and 0.2-1.5% of antioxidant. The refrigerator lining opening prepared by the material solves the problem that the refrigerator lining opening is easy to warp and deform. The preparation method of the modified polypropylene material provided by the application can optimize the performance of the copolymerized PP and the homopolymerized PP to obtain better low-temperature impact resistance and rigidity, and the ice chest lining prepared by the material has lower cost than the ice chest lining prepared by the ABS material, is suitable for industrial application and has outstanding application effect.
Description
Technical Field
The application relates to the field of high polymer materials, in particular to a modified polypropylene material and a preparation method and application thereof.
Background
The liner opening of the refrigerator adopts an integral injection molding structure of acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene ABS), and the special structure requires a splicing structure of an ABS injection molding piece and a PVC extrusion piece. The ABS used for the liner is typically a conventional ABS brand due to cost limitations.
The refrigerator-freezer is assembled by shell and bush, and the shell of refrigerator-freezer is the metal material, and the coefficient of thermal expansion and shrinkage of metal is little, and the bush is the plastics material, and the coefficient of thermal expansion and shrinkage of plastics is big, and in the refrigerator-freezer use, the coefficient of thermal expansion and shrinkage of metal and plastics two materials differs greatly, and the phenomenon of ftracturing appears easily in the turning or the weak position of plastics bush. The trend of the foaming material system of the refrigerator is a multi-element foaming system, the heat conductivity coefficient of the multi-element foaming system is lower, but the chemical corrosiveness of the multi-element foaming material system is higher than that of a cyclopentane system, the chemical corrosiveness of the ABS material multi-element foaming system is poor, and chemical corrosion cracking of a lining opening is easy to occur.
The polypropylene (polypropylene P) material has the advantages of low density, good heat resistance, low cost, good chemical corrosion resistance and the like, is resistant to fracture and is not easy to break, if the lining made of the PP material is used, the defects of physical stress cracking and chemical corrosion cracking of the lining can be improved, and the cost of a finished product is reduced.
However, because the shrinkage rate of the PP material is large, the size of the refrigerator lining opening is large, the refrigerator lining opening is special in structure, the shrinkage rate is large, the lining opening part of the PP material is easy to warp, deform and the like, the low temperature resistance of the PP material is poor, the surface hardness of the PP material is lower than that of the ABS material, and the application of the PP material on the refrigerator lining opening is limited.
Disclosure of Invention
The application provides a modified polypropylene material, a preparation method and application thereof, and aims to solve the problems of warping and deformation of a lining of a PP material.
In a first aspect, the present application provides a modified polypropylene material, said material comprising: 40-75% of copolymerized PP, 10-30% of homo-polymerized PP, 3-20% of toughening agent, 1-5% of scratch resistant agent, 0.2-5% of compatilizer, 1-3% of titanium pigment, 0.2-2% of lubricant, 0.2-1.5% of light stabilizer and 0.2-1.5% of antioxidant.
Alternatively, the copolymerized PP has a melt mass flow rate of greater than 10g/10min at 230℃under a load of 2.16 Kg.
Optionally, the notched Izod impact strength of the copolymerized PP is greater than 6Kj/m 2 。
Optionally, the melt mass flow rate of the homo-PP at 230 ℃ under a load of 2.16Kg is greater than 2g/10min.
Optionally, the Izod notch impact strength of the homo-PP is greater than 3Kj/m 2 。
Optionally, the toughening agent is any one or a combination of a plurality of Ethylene Propylene Diene Monomer (EPDM) and polyolefin elastomer (POE).
Optionally, the scratch resistant agent is a silicone master batch.
In a second aspect, the present application provides a method for preparing the modified polypropylene material according to the first aspect, comprising:
adding the copolymerized PP, the homo-polymerized PP, the toughening agent, the scratch resistant agent, the compatilizer, the titanium pigment, the lubricant, the light stabilizer and the antioxidant into a high-speed mixer, and mixing for 3-5min to obtain a mixture;
and adding the mixture into a double-screw extruder, extruding and granulating to obtain the modified polypropylene material.
Optionally, the temperature range of the double-screw extruder is 180-220 ℃, and the screw rotating speed range of the double-screw extruder is 300-500rpm/min.
In a third aspect, the present application provides the use of the modified polypropylene material of the first aspect in ice chest liners.
The application provides a modified polypropylene material, a preparation method and application thereof, wherein the material comprises the following components: 40-75% of copolymerized PP, 10-30% of homo-polymerized PP, 3-20% of toughening agent, 1-5% of scratch resistant agent, 0.2-5% of compatilizer, 1-3% of titanium pigment, 0.2-2% of lubricant, 0.2-1.5% of light stabilizer and 0.2-1.5% of antioxidant. The refrigerator lining opening prepared by the material solves the problem that the refrigerator lining opening is easy to warp and deform. The refrigerator lining mouth prepared from the material has good assembly performance with a metal shell, and has qualified appearance and no cracking after high and low temperature tests.
The preparation method of the modified polypropylene material provided by the application can optimize the performance of the copolymerized PP and the homopolymerized PP to obtain better low-temperature impact resistance and rigidity, and has the advantages of simple process, easy amplified production and industrial application prospect.
The ice chest lining prepared by the modified polypropylene material has lower cost than the ice chest lining prepared by the ABS material, is suitable for industrial application and has outstanding application effect.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic flow chart of a process for preparing a modified polypropylene material.
Detailed Description
Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the examples below do not represent all embodiments consistent with the application. Merely exemplary of systems and methods consistent with aspects of the application as set forth in the claims.
The refrigerator-freezer lining mouth is installed on the refrigerator-freezer cabinet body, cooperates with the cabinet door, makes cabinet door and cabinet body form the part of a airtight space, in the production lining mouth in-process, because of the cost requirement, in some embodiments, the lining mouth is made of ABS material, when the shell of refrigerator-freezer is the metal material, because the coefficient of thermal expansion and contraction of metal material is less, the coefficient of thermal expansion and contraction of ABS material is big, because the coefficient of thermal expansion and contraction of both differs greatly, leads to the refrigerator-freezer in use, the refrigerator-freezer lining mouth appears the fracture phenomenon easily, makes the leakproofness of refrigerator-freezer worsen, influence the use. The PP material has the characteristics of folding resistance and difficult fracture, when the lining mouth prepared from the PP material is used, the shrinkage rate of the PP material is large, and the structure of the ice chest lining mouth is special, so that the ice chest lining mouth is easy to warp and deform.
The application provides a modified polypropylene material, which comprises the following components in percentage by mass: 40-75% of copolymerized PP, 10-30% of homo-polymerized PP, 3-20% of toughening agent, 1-5% of scratch resistant agent, 0.2-5% of compatilizer, 1-3% of titanium pigment, 0.2-2% of lubricant, 0.2-1.5% of light stabilizer and 0.2-1.5% of antioxidant.
The copolymerized PP is random copolymerized polypropylene, and is obtained by copolymerizing propylene monomer and 1-4% of ethylene monomer under the actions of heating, pressurizing and catalyst, evaporating and removing solvent by a high-temperature gas stripping method to obtain molten polypropylene, and extruding and granulating to obtain a granular product, wherein the copolymerized PP has the advantages of low strength, high rigidity, good heat resistance, good dimensional stability and good low-temperature toughness.
The homo-PP is homo-polypropylene polymerized by single propylene monomer, does not contain ethylene monomer in molecular chain, uses high boiling point straight chain hydrocarbon as solvent, operates at the temperature higher than the melting point of polypropylene, and the obtained polymer is completely dissolved in the solvent to be homogeneously distributed, and has high strength, poor impact resistance, poor low-temperature toughness, poor dimensional stability, easy aging and poor long-term heat resistance stability.
To obtain a relatively high strength, low temperature toughness good refrigerator-liner material, in some embodiments, the copolymerized PP has a melt mass flow rate MFR > 10g/10min at 230℃under a load of 2.16Kg, copolymerizedThe notched impact strength of the cantilever beam of the PP is more than 6Kj/m 2 . In some embodiments, the melt mass flow rate MFR of the homopolymerized PP is > 2g/10min at 230℃under a load of 2.16 Kg. The notch impact strength of the cantilever beam of the homopolymerized PP is more than 3Kj/m 2 . After the copolymerized PP and the homopolymerized PP materials are blended, the performance of the copolymerized PP and the homopolymerized PP can be optimized, so that the ice chest lining material with high strength and good low-temperature toughness is obtained.
In order to provide better use feeling, toughness and scratch resistance are all essential items in the use process of the refrigerator lining, and to obtain a modified polypropylene material more suitable for the refrigerator lining, the modified polypropylene materials of examples 1-7 and comparative examples 1-2 were prepared by uniformly mixing the substances according to the proportions shown in Table 1 for testing.
TABLE 1
TABLE 2
Referring to tables 1 and 2, experiments were performed with different types and percentages of materials for better strength, low temperature toughness, and scratch resistance.
In some embodiments, the toughening agent is a combination of any one or more of ethylene propylene diene monomer EPDM, polyolefin elastomer POE, for example: example 1 is a combination of ethylene propylene diene monomer EPDM and polyolefin elastomer POE, wherein the polyolefin elastomer POE is 6%, the ethylene propylene diene monomer EPDM is 2%; for another example: the toughening agent is selected from any one of Ethylene Propylene Diene Monomer (EPDM) and polyolefin elastomer (POE), wherein in the embodiment 4 and the embodiment 5, 14 percent of EPDM and 9 percent of POE are respectively selected.
Because the percentages of the toughening agents are different in different examples, different effects can occur, and when the proportions of the toughening agents are comparative example 1 and comparative example 2, the percentage of the toughening agents is 2.3%; when the proportion of the toughening agent is in the range of 8-9% in examples 1, 2, 3 and 5, the toughness of the modified polypropylene material at low temperature is better than that of comparative examples 1 and 2; when the proportion of the toughening agent is in example 4, the percentage of the toughening agent is 14%, and the toughness of the modified polypropylene material at low temperature is better than that of the modified polypropylene material with the percentage of the toughening agent being 2.3%, but is worse than that of the modified polypropylene material with the percentage of the toughening agent being 8-9%; that is, when the percentage of toughening agent is 8-9% of the modified polypropylene material, the toughness is superior and independent of the choice of polyolefin elastomer POE or EPDM, therefore, in some embodiments, the percentage of toughening agent is 8-9%.
In use, to reduce the scratch of the liner, a trace is left, thereby affecting use, in some embodiments the scratch resistant agent is a silicone masterbatch.
In order to better regulate and control the microscopic phase structure of the copolymerized PP and the homo-polymerized PP, thereby realizing the high performance and functionalization effect, in some embodiments, the modified polypropylene material further comprises a compatilizer, wherein the percentage of the compatilizer is 0.3%, and the compatilizer can be any one or a combination of more of a silane coupling agent and a titanate coupling agent.
The titanium dioxide can be used as a colorant, has the functions of reinforcement, aging resistance and filling, and in some embodiments, the modified polypropylene material further comprises titanium dioxide, and the titanium dioxide is exemplified by rutile type titanium dioxide, and the rutile type titanium dioxide has more stable crystal lattice, good water resistance and difficult yellowing.
Based on the modified polypropylene material, some embodiments of the present application further provide a preparation method of the modified polypropylene material, referring to fig. 1, including:
it can be understood that the breaking strength, hardness, toughness, aging resistance and other properties of the co-PP and the homo-PP can be improved due to the small melt index of the co-PP and the homo-PP, so that the refrigerator lining prepared by the preparation method has better properties.
S100: adding the copolymerized PP, the homo-polymerized PP, the toughening agent, the scratch resistant agent, the compatilizer, the titanium pigment, the lubricant, the light stabilizer and the antioxidant into a high-speed mixer, and mixing for 3-5min to obtain a mixture;
because the performance of the copolymerized PP is different from that of the homopolymerized PP, to optimize the performance of the two, firstly, the copolymerized PP and the homopolymerized PP are blended, and then the toughening agent, the scratch resistant agent, the compatilizer, the titanium pigment, the lubricant, the light stabilizer and the antioxidant are added into a high-speed mixer together, and the mixing time of the mixer is 3min, 4min and 5min.
S200: and adding the mixture into a double-screw extruder, extruding and granulating to obtain the modified polypropylene material.
In some embodiments, the temperature range of the twin screw extruder is 180-220℃and the screw speed range of the twin screw extruder is 300-500rpm/min. By way of example, the temperature of the twin-screw extruder may be 180 ℃, 190 ℃, 200 ℃, 210 ℃, 220 ℃, and the screw speed of the twin-screw extruder may be 300rpm/min, 400rpm/min, 500rpm/min.
The performance impact of the percentages of copolymerized PP and homo-PP on the modified polypropylene material was tested using examples 12, 13 and comparative example 3 without considering the impact of the toughening agent, scratch resistance agent, compatibilizer, titanium pigment, lubricant, light stabilizer and antioxidant on the modified polypropylene material.
Example 12, copolymerized PP, homo-PP, toughener, scratch resistance agent, compatibilizer, titanium pigment, lubricant, light stabilizer and antioxidant were blended in a high speed mixer, wherein the percentage of copolymerized PP was 70%, the percentage of homo-PP was 15% and the percentage of other materials was 15%.
Example 13, copolymerized PP, homo PP, toughener, scratch resistance agent, compatibilizer, titanium pigment, lubricant, light stabilizer and antioxidant were blended in a high speed mixer, wherein the percentage of copolymerized PP was 65%, the percentage of homo PP was 20% and the percentage of other materials was 15%.
Comparative example 3, copolymerized PP, homo-PP, toughener, scratch resistant agent, compatilizer, titanium pigment, lubricant, light stabilizer and antioxidant were added into a high speed mixer to blend, wherein the percentage of copolymerized PP was 90%, the percentage of homo-PP was 5%, and the percentage of other materials was 5%.
It will be appreciated that the mixing times, temperatures of the twin screw extruders and screw speeds in examples 12-13 and example 3 were the same.
TABLE 3 Table 3
As can be seen from table 3, the modified polypropylene materials of example 12 and example 13 have a smaller difference in properties, that is, the difference in properties is smaller when the percentage of copolymerized PP and homopolypp is 85%, and the difference in properties is larger when the percentage of copolymerized PP and homopolypp is 95%, except that the notched impact strength of the cantilever beam is smaller than that of examples 12 and 13, and thus, in some examples, the percentage of copolymerized PP and homopolypp is 85%.
In addition to the effect on the modified polypropylene material by using the percentage of copolymerized PP to homopolypp, the mixing time also had an effect on the modified polypropylene material, and the test was performed using example 14 and comparative example 4.
Example 14, adding 70% of copolymerized PP, 15% of homopolymerized PP, 15% of other materials into a high-speed mixer for blending, wherein the copolymerized PP, the toughening agent, the scratch-resistant agent, the compatilizer, the titanium pigment, the lubricant, the light stabilizer and the antioxidant are mixed; mixing for 3min, adding the mixture into a double-screw extruder, extruding and granulating to obtain the modified polypropylene material, wherein the temperature of the double-screw extruder is 200 ℃, and the screw rotating speed is 400rpm/min.
Comparative example 4, adding 70% of copolymerized PP, 15% of homo-PP, 15% of other materials into a high-speed mixer for blending, wherein the copolymerized PP, the toughening agent, the scratch-resistant agent, the compatilizer, the titanium pigment, the lubricant, the light stabilizer and the antioxidant are mixed; mixing for 6min, adding the mixture into a double-screw extruder, extruding and granulating to obtain the modified polypropylene material, wherein the temperature of the double-screw extruder is 200 ℃, and the screw rotating speed is 400rpm/min.
TABLE 4 Table 4
| Test item | Test method | Test conditions | Unit (B) | Example 14 | Comparative example 4 |
| Tensile Strength | GB/T1040 | 50mm/min | MPa | 26 | 25 |
| Elongation at break | GB/T1040 | 50mm/min | ％ | 55 | 53 |
| Flexural Strength | GB/T9341 | 2mm/min | MPa | 32 | 30 |
| Flexural modulus | GB/T9341 | 2mm/min | MPa | 1450 | 1400 |
| Notched impact strength of cantilever beam | GB/T1843 | 4mm,23℃ | Kj/m2 | 12 | 10 |
| Rockwell hardness | GB/T3398 | R scale | / | 95 | 93 |
Referring to example 14 and comparative example 4, since the blending time of example 14 is different from that of comparative example 4, when the blending time is 6 minutes, referring to Table 4, it can be seen that each performance index of comparative example 4 is smaller than that of example 14, that is, the blending time affects each performance of the modified polypropylene material.
Based on the modified polypropylene material and the preparation method thereof, the application also provides the application of the modified polypropylene material in the refrigerator lining.
The application provides a modified polypropylene material, a preparation method and application thereof, wherein the material comprises the following components: 40-75% of copolymerized PP, 10-30% of homo-polymerized PP, 3-20% of toughening agent, 1-5% of scratch resistant agent, 0.2-5% of compatilizer, 1-3% of titanium pigment, 0.2-2% of lubricant, 0.2-1.5% of light stabilizer and 0.2-1.5% of antioxidant. The refrigerator lining opening prepared by the material solves the problem that the refrigerator lining opening is easy to warp and deform. The assembly performance of the refrigerator lining mouth with the metal shell is better, and after the refrigerator lining mouth prepared by the material is subjected to high-low temperature test, the appearance of the refrigerator lining mouth is qualified, and the refrigerator lining mouth is free from cracking and other phenomena. The preparation method of the modified polypropylene material provided by the application can optimize the performance of the copolymerized PP and the homopolymerized PP to obtain better low-temperature impact resistance and rigidity, and the ice chest lining prepared by the material has lower cost than the ice chest lining prepared by the ABS material, is suitable for industrial application and has outstanding application effect.
The above-provided detailed description is merely a few examples under the general inventive concept and does not limit the scope of the present application. Any other embodiments which are extended according to the solution of the application without inventive effort fall within the scope of protection of the application for a person skilled in the art.
Claims (10)
1. The modified polypropylene material is characterized by comprising the following components in percentage by mass: 40-75% of copolymerized PP, 10-30% of homo-polymerized PP, 3-20% of toughening agent, 1-5% of scratch resistant agent, 0.2-5% of compatilizer, 1-3% of titanium pigment, 0.2-2% of lubricant, 0.2-1.5% of light stabilizer and 0.2-1.5% of antioxidant.
2. The modified polypropylene material according to claim 1, wherein the copolymerized PP has a melt mass flow rate of greater than 10g/10min at 230 ℃, under a load of 2.16 Kg.
3. The modified polypropylene material according to claim 1, wherein the copolymerized PP has a notched izod impact strengthGreater than 6Kj/m 2 。
4. The modified polypropylene material according to claim 1, wherein the melt mass flow rate of the homo-PP at 230 ℃, under a load of 2.16Kg is greater than 2g/10min.
5. The modified polypropylene material according to claim 1, wherein the homo-PP has a notched izod impact strength of greater than 3Kj/m 2 。
6. The modified polypropylene material according to claim 1, wherein the toughening agent is any one or a combination of a plurality of ethylene propylene diene monomer EPDM and polyolefin elastomer POE.
7. The modified polypropylene material according to claim 1, wherein the scratch resistant agent is a silicone masterbatch.
8. The method for producing a modified polypropylene material as claimed in any one of claims 1 to 7, comprising:
adding the copolymerized PP, the homo-polymerized PP, the toughening agent, the scratch resistant agent, the compatilizer, the titanium pigment, the lubricant, the light stabilizer and the antioxidant into a high-speed mixer, and mixing for 3-5min to obtain a mixture;
and adding the mixture into a double-screw extruder, extruding and granulating to obtain the modified polypropylene material.
9. The method according to claim 8, wherein the twin-screw extruder has a temperature range of 180-220 ℃ and a screw speed range of 300-500rpm/min.
10. Use of the modified polypropylene material of any one of claims 1-7 in ice chest liners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058655A (en) * | 2006-04-18 | 2007-10-24 | 上海金发科技发展有限公司 | Stress blanching and stress crack resistant filling modified polypropylene, preparation method and application |
| EP1950243A1 (en) * | 2007-01-22 | 2008-07-30 | Borealis Technology Oy | Polypropylene composition with low surface energy |
| CN101338054A (en) * | 2008-08-14 | 2009-01-07 | 苏州工业园区和昌电器有限公司 | Modified polypropylene material for top cover of refrigerator and method for preparing same |
| CN102108156A (en) * | 2009-12-28 | 2011-06-29 | 上海日之升新技术发展有限公司 | Compound polypropylene material for refrigerator drawers and preparation method thereof |
| CN114736460A (en) * | 2022-04-27 | 2022-07-12 | 海信（山东）冰箱有限公司 | Refrigerator liner material, preparation method thereof and refrigerator liner |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058655A (en) * | 2006-04-18 | 2007-10-24 | 上海金发科技发展有限公司 | Stress blanching and stress crack resistant filling modified polypropylene, preparation method and application |
| EP1950243A1 (en) * | 2007-01-22 | 2008-07-30 | Borealis Technology Oy | Polypropylene composition with low surface energy |
| CN101338054A (en) * | 2008-08-14 | 2009-01-07 | 苏州工业园区和昌电器有限公司 | Modified polypropylene material for top cover of refrigerator and method for preparing same |
| CN102108156A (en) * | 2009-12-28 | 2011-06-29 | 上海日之升新技术发展有限公司 | Compound polypropylene material for refrigerator drawers and preparation method thereof |
| CN114736460A (en) * | 2022-04-27 | 2022-07-12 | 海信（山东）冰箱有限公司 | Refrigerator liner material, preparation method thereof and refrigerator liner |
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