CN112625344B - Vehicle polypropylene composite material modified based on organosilicon-based amphiphilic polymer and preparation method thereof - Google Patents
Vehicle polypropylene composite material modified based on organosilicon-based amphiphilic polymer and preparation method thereof Download PDFInfo
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- CN112625344B CN112625344B CN202011428947.4A CN202011428947A CN112625344B CN 112625344 B CN112625344 B CN 112625344B CN 202011428947 A CN202011428947 A CN 202011428947A CN 112625344 B CN112625344 B CN 112625344B
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- -1 polypropylene Polymers 0.000 title claims abstract description 93
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 81
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 81
- 229920000642 polymer Polymers 0.000 title claims abstract description 65
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 19
- 229920001971 elastomer Polymers 0.000 claims abstract description 18
- 239000000806 elastomer Substances 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims description 18
- 239000000314 lubricant Substances 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- 239000004611 light stabiliser Substances 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 11
- 239000002202 Polyethylene glycol Substances 0.000 claims description 11
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 11
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 11
- 229920001223 polyethylene glycol Polymers 0.000 claims description 11
- 229920001577 copolymer Polymers 0.000 claims description 8
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 7
- 239000003999 initiator Substances 0.000 claims description 7
- 238000002390 rotary evaporation Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- 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 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 229920005604 random copolymer Polymers 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 abstract description 12
- 238000005507 spraying Methods 0.000 abstract description 6
- 239000010985 leather Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000009832 plasma treatment Methods 0.000 abstract 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
- 238000002156 mixing Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 238000000746 purification Methods 0.000 description 5
- 238000001953 recrystallisation Methods 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000003678 scratch resistant effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- JKBYAWVSVVSRIX-UHFFFAOYSA-N octadecyl 2-(1-octadecoxy-1-oxopropan-2-yl)sulfanylpropanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)SC(C)C(=O)OCCCCCCCCCCCCCCCCCC JKBYAWVSVVSRIX-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229940037312 stearamide Drugs 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 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
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/12—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes
- C08F283/124—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes on to polysiloxanes having carbon-to-carbon double bonds
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The application discloses a modified polypropylene composite material for vehicles based on organosilicon-based amphiphilic polymers and a preparation method thereof, wherein the modified polypropylene material consists of 0-3 parts of organosilicon-based amphiphilic polymers, 45-90 parts of conventional polypropylene, 5-20 parts of talcum powder, 0-15 parts of elastomers, 0.1-1.5 parts of antioxidants and 0-3 parts of other auxiliary agents. The prepared organosilicon-based amphiphilic polymer, talcum powder, elastomer, auxiliary agent and conventional polypropylene are extruded by double screws to form a strip blend, and the blend is cooled by circulating water and then enters a granulator for granulating to obtain modified polypropylene particles. The organosilicon-based amphiphilic polymer modified polypropylene composite material for the vehicle has excellent paint adhesion and scratch resistance, and can ensure good adhesion of paint and good scratch resistance of leather surfaces for automobile exterior trim parts, especially semi-spraying bumpers; meanwhile, flame treatment, plasma treatment and the like before the current paint spraying can be omitted; the production efficiency is improved, and the cost is greatly reduced.
Description
Technical Field
The application relates to a functional polypropylene material and a preparation method thereof, in particular to a high-performance modified polypropylene composite material for vehicles based on functional POSS hybridization and a preparation method thereof, belonging to the technical field of polypropylene.
Background
With the rapid development of the novel automobile industry, higher requirements for automobile weight reduction, safety, comfort in the automobile, environmental protection and the like are put forward. Therefore, the performance requirements for automotive interior and exterior materials also present a greater challenge. The modified polypropylene is used as a common material for automobile interior and exterior parts, has the outstanding advantages of wide sources, small density, good mechanical balance, chemical corrosion resistance, easy processing, low price and the like, and becomes the preferred plastic for automobile light weight. Can be widely applied to the inner and outer decoration parts of automobiles, such as: bumper bar, instrument desk, center console, storage box, door trim panel, upright post, side skirt, trunk trim strip, etc. The bumper material with high requirements on spraying performance needs flame treatment or isopropanol wiping before spraying to improve the surface tension of the material and improve the paint adhesive force; particularly, when there is a semi-spray condition for some vehicle model designs; the lubricant in the modified polypropylene formulation can have an impact on the adhesion of the paint spray properties. Therefore, it is important to ensure both the paint adhesion performance and the scratch resistance of the exposed dermatoglyph surface. Meanwhile, the loading efficiency is seriously affected in the case of spraying paint after the surface of polypropylene is treated by flame or plasma adopted in the prior art, so that the aim of improving the industrialization efficiency can be fulfilled by adding effective auxiliary agents to improve the surface tension of the polypropylene.
Disclosure of Invention
The application aims to overcome the defects of the prior art, and discloses a modified polypropylene composite material for a vehicle based on an organosilicon-based amphiphilic polymer and a preparation method thereof. The introduction of the organosilicon-based amphiphilic polymer greatly improves the surface tension of the modified polypropylene, achieves the surface tension effect after the traditional flame treatment, and obviously improves the paint adhesion effect. This is mainly due to the fact that hydrophilic groups in the organosilicon-based amphiphilic polymer migrate to the surface to improve the hydrophilicity of the polypropylene surface and improve the surface tension. Meanwhile, the amphipathic polymer group contains an organosilicon group, so that the lubricating effect of the polypropylene surface can be improved, and meanwhile, the amphipathic polymer has better scratch resistance. And the introduction of the amphiphilic polymer has no influence on the basic mechanical properties of the modified polypropylene.
The application aims at realizing the following technical scheme:
the modified polypropylene composite material for the vehicle based on the organosilicon-based amphiphilic polymer is prepared from the following raw materials in parts by weight:
conventional polypropylene: 45-90 parts;
talc powder: 5-20 parts;
an elastomer: 0.1-20 parts;
organosilicon-based amphiphilic polymer powder: 0.1-3 parts;
an antioxidant: 0.1 to 1.5 parts;
other auxiliaries: 0-3 parts;
wherein the conventional polypropylene material refers to polypropylene with the material flow speed of 10g/10min to 100g/10min under the condition of 230 ℃ and 2.16 Kg.
The talcum powder is 1250-10000 mesh talcum powder material.
The elastomer is one or a mixture of several of ethylene-propylene copolymer, ethylene-hexene copolymer, ethylene-butene copolymer and ethylene-octene copolymer, and the density is 0.80-1.0 g/cm 3 。
The organosilicon-based amphiphilic polymer powder material is a random copolymer of vinyl-terminated polydimethylsiloxane and polyethylene glycol methacrylate (the mole fraction is 1:1).
The relative molecular weight of the monomer end vinyl polydimethylsiloxane of the organosilicon-based amphiphilic polymer is 2500Da, and the relative molecular weight of the polyethylene glycol methacrylate is 500Da.
The antioxidant is one or a mixture of more of antioxidant 1010 (tetra (beta-3, 5-di-tert-butyl-4-hydroxyphenyl) pentaerythritol ester), antioxidant 168 (tri (2, 4-di-tert-butylphenyl) phosphite ester and antioxidant DSTP (dioctadecyl thiodipropionate).
The other auxiliary agents are light stabilizers V703, 5589 and 531, lubricant white oil, vinyl bis-stearamide (EBS) and the like.
The preparation method of the organosilicon-based amphiphilic polymer modified polypropylene composite material for the vehicle comprises the following preparation steps:
(1) Adding vinyl-terminated polydimethylsiloxane, polyethylene glycol methacrylate and an initiator into an organic solvent, reacting for 12 hours under the protection of inert gas at 85 ℃ to obtain an organosilicon-based amphiphilic polymer solution, performing rotary evaporation concentration, purifying and recrystallizing to obtain an amphiphilic polymer solid.
(2) According to the weight portions, the organosilicon-based amphiphilic polymer powder, the polypropylene, the talcum powder, the elastomer, the antioxidant and other auxiliary agents are added into a high-speed mixer to be mixed uniformly, and then added into a double-screw extruder to prepare the modified polypropylene composite material through melting, extrusion, cooling and granulating of the double-screw extruder.
The processing temperature of the I-X region of the double-screw extruder is 150 ℃,185 ℃,205 ℃,205 ℃,210 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 230 ℃ in sequence. The rotation speed of the main screw is 500-550 r/min, and the temperature of the water tank is 30-60 ℃.
Compared with the prior art, the application has the following technical advantages:
compared with the traditional polypropylene modified material for vehicles, the surface tension of the modified polypropylene composite material is obviously improved, and the pretreatment process of exterior paint spraying can be reduced; simultaneously; for the half spray piece, the good scratch-resistant effect of dermatoglyph can be ensured; and does not affect the paint adhesion of the paint portion. Meanwhile, the addition of the amphiphilic polymer does not affect the excellent mechanical properties of the modified polypropylene.
Detailed Description
The present application will be further illustrated with reference to specific examples. It should be emphasized that these examples are merely provided to further illustrate the application and should not be construed as limiting the scope of the application. Further, it is understood that various changes and modifications of the present application may be made by those skilled in the art after reading the description of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
Example 1
50 parts of vinyl-terminated polydimethylsiloxane, 50 parts of polyethylene glycol methacrylate and 0.05 part of initiator are added into tetrahydrofuran to react for 12 hours under the protection of inert gas at 85 ℃ to obtain an organosilicon-based amphiphilic polymer solution, and the organosilicon-based amphiphilic polymer solution is subjected to rotary evaporation concentration, purification and recrystallization to obtain an organosilicon-based amphiphilic polymer solid.
Organosilicon-based amphiphilic polymer modified polypropylene composite material: according to the weight portions, 0.5 portion of organosilicon-based amphiphilic polymer powder, 80 portions of polypropylene with the flow speed of 60g/10min, 5 portions of 3000 mesh talcum powder, 12 portions of elastomer, 0.1 portion of 1010 antioxidant and other auxiliary agents: adding lubricant white oil and light stabilizer V7031.9 parts into a high-speed mixer together, mixing uniformly, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Comparative example 1
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 80.5 parts of polypropylene with the flow speed of 60g/10min, 5 parts of 3000-mesh talcum powder, 12 parts of elastomer, 0.1 part of 1010 antioxidant and other auxiliary agents in parts by weight: adding 1.9 parts of lubricant white oil and light stabilizer V703 into a high-speed mixer, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Example 2
50 parts of vinyl-terminated polydimethylsiloxane, 50 parts of polyethylene glycol methacrylate and 0.05 part of initiator are added into tetrahydrofuran to react for 12 hours under the protection of inert gas at 85 ℃ to obtain an organosilicon-based amphiphilic polymer solution, and the organosilicon-based amphiphilic polymer solution is subjected to rotary evaporation concentration, purification and recrystallization to obtain an organosilicon-based amphiphilic polymer solid.
Organosilicon-based amphiphilic polymer modified polypropylene composite material: according to the parts by weight, 1 part of organosilicon-based amphiphilic polymer powder, 75 parts of polypropylene with the flow speed of 60g/10min, 10 parts of 3000-mesh talcum powder, 12 parts of elastomer, 0.3 part of DSTP antioxidant and other auxiliary agents: adding 55891.5 parts of lubricant white oil and light stabilizer into a high-speed mixer, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Comparative example 2
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 76 parts of polypropylene with the flow speed of 60g/min, 16 parts of 3000-mesh talcum powder, 12 parts of elastomer, 0.3 part of DSTP antioxidant and other auxiliary agents in parts by weight: adding 1.5 parts of lubricant white oil and light stabilizer 5589 into a high-speed mixer, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Example 3
50 parts of vinyl-terminated polydimethylsiloxane, 50 parts of polyethylene glycol methacrylate and 0.05 part of initiator are added into tetrahydrofuran to react for 12 hours under the protection of inert gas at 85 ℃ to obtain an organosilicon-based amphiphilic polymer solution, and the organosilicon-based amphiphilic polymer solution is subjected to rotary evaporation concentration, purification and recrystallization to obtain an organosilicon-based amphiphilic polymer solid.
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 2 parts of organosilicon-based amphiphilic polymer material, 78 parts of polypropylene with the flow rate of 30g/10min, 10 parts of 3000-mesh talcum powder, 8 parts of elastomer, 0.5 part of DSTP antioxidant and other auxiliary agents in parts by weight: adding 55891.5 parts of lubricant white oil and light stabilizer into a high-speed mixer, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Comparative example 3
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 80 parts of polypropylene with the flow speed of 30g/10min, 0.2 part of amphiphilic polymer powder, 20 parts of 3000-mesh talcum powder, 8 parts of elastomer, 0.5 part of DSTP antioxidant and other auxiliary agents in parts by weight: adding 1.5 parts of lubricant white oil and light stabilizer 5589 into a high-speed mixer, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Example 4
50 parts of vinyl-terminated polydimethylsiloxane, 50 parts of polyethylene glycol methacrylate and 0.05 part of initiator are added into tetrahydrofuran to react for 12 hours under the protection of inert gas at 85 ℃ to obtain an organosilicon-based amphiphilic polymer solution, and the organosilicon-based amphiphilic polymer solution is subjected to rotary evaporation concentration, purification and recrystallization to obtain an organosilicon-based amphiphilic polymer solid.
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 3 parts of organosilicon-based amphiphilic polymer powder, 40 parts of polypropylene with the flow speed of 100g/10min, 30 parts of polypropylene with the flow speed of 12g/10min, 10 parts of 10000-mesh talcum powder, 14 parts of elastomer, 1 part of DSTP antioxidant and other auxiliary agents in parts by weight: adding 2 parts of lubricant white oil and 5589 light stabilizer into a high-speed mixer together, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Comparative example 4
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 40 parts of polypropylene with the flow speed of 100g/10min, 0.3 part of organosilicon-based amphiphilic polymer powder, 30 parts of polypropylene with the flow speed of 12g/10min, 13 parts of 10000-mesh talcum powder, 14 parts of elastomer, 1 part of DSTP antioxidant and other auxiliary agents in parts by weight: adding 2 parts of lubricant white oil and 5589 light stabilizer into a high-speed mixer together, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Example 5
50 parts of vinyl-terminated polydimethylsiloxane, 50 parts of polyethylene glycol methacrylate and 0.05 part of initiator are added into tetrahydrofuran to react for 12 hours under the protection of inert gas at 85 ℃ to obtain an organosilicon-based amphiphilic polymer solution, and the organosilicon-based amphiphilic polymer solution is subjected to rotary evaporation concentration, purification and recrystallization to obtain an organosilicon-based amphiphilic polymer solid.
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 1 part of organosilicon-based amphiphilic polymer powder, 66 parts of polypropylene with the flow speed of 50g/10min, 20 parts of 5000-mesh talcum powder, 10 parts of elastomer, 0.8 part of 168 antioxidant and other auxiliary agents in parts by weight: adding 1.5 parts of lubricant white oil and 531 light stabilizer into a high-speed mixer, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
Comparative example 5
Organosilicon-based amphiphilic polymer modified polypropylene composite material: 66 parts of polypropylene with the flow speed of 50g/10min, 21 parts of 5000-mesh talcum powder, 10 parts of elastomer, 0.8 part of 168 antioxidant and other auxiliary agents in parts by weight: adding 1.5 parts of lubricant white oil and 531 light stabilizer into a high-speed mixer, uniformly mixing, adding into a double-screw extruder, and melting, extruding, cooling and granulating by the double-screw extruder to prepare the modified polypropylene composite material.
The processing temperature of the I-X region of the double-screw extruder is 155 ℃,180 ℃,200 ℃,205 ℃,215 ℃,220 ℃,225 ℃,225 ℃,230 ℃ and 235 ℃ in sequence. The rotation speed of the main screw is 550r/min, and the temperature of the water tank is 38 ℃.
TABLE 1 Performance test Standard and conditions for organosilicon-based amphiphilic Polymer modified Polypropylene composite
| Sequence number | Inspection index | Inspection method | Unit (B) | Test conditions |
| 1 | Density of | GB/T 1033.1 | g/cm^3 | |
| 2 | Tensile Strength | GB/T 1040.2 | MPa | 50mm/min |
| 3 | Flexural modulus | GB/T 9341 | MPa | 2mm/min |
| 4 | Flexural Strength | GB/T 9341 | MPa | 2mm/min |
| 5 | Notched impact Strength | GB/T 1043 | kJ/m^2 | 23℃/-30℃ |
| 6 | Melt flow Rate | GB/T 3682 | g/10min | 230℃×2.16kg |
| 7 | Heat distortion temperature | GB/T1634 | ℃ | 0.45Mpa |
| 8 | Scratch resistance | PV3952 | Stage | 10N (K3A leather pattern) |
| 9 | Surface tension | / | mN/m | / |
Table 2 test data for basic mechanical properties and test results for surface tension and scratch resistance of the modified polypropylene composites of examples and comparative examples 1 to 5
For the test results of the modified polypropylene composite materials prepared by partial representative embodiments in the modified polypropylene composite materials of the organosilicon-based amphiphilic polymer in the examples and comparative examples 1 to 5 of the patent of the application, after the organosilicon-based amphiphilic polymer is added into the modified polypropylene formula, the surface tension of the modified polypropylene surface is greatly improved, which is beneficial to the paint surface adhesion; at the same time, the front surface treatment can be reduced or even avoided; at the same time, the scratch-resistant effect of the dermatoglyph surface is greatly improved, which is attributed to the fact that the organosilicon migrates to the surface to play a role in lubrication. Meanwhile, the mechanical property evaluation of the embodiment and the comparative example hardly has difference, which indicates that the organosilicon-based amphiphilic polymer cannot cause the mechanical property of the material to be reduced; has wide application potential.
Claims (8)
1. The utility model provides a polypropylene composite material for automobile based on organosilicon-based amphiphilic polymer modification which characterized in that: the material is prepared from the following raw materials in parts by weight:
conventional polypropylene: 45-90 parts;
talc powder: 5-20 parts;
an elastomer: 0.1-20 parts;
organosilicon-based amphiphilic polymer powder: 0.1-3 parts;
an antioxidant: 0.1 to 1.5 parts;
other auxiliaries: 0-3 parts; the organosilicon-based amphiphilic polymer powder material is a random copolymer of vinyl-terminated polydimethylsiloxane and polyethylene glycol methacrylate, and the mole fraction is 1:1;
the conventional polypropylene material refers to polypropylene with the material flow speed of 10g/10min to 100g/10min under the condition of 230 ℃ and 2.16 Kg.
2. The organosilicon-based amphiphilic polymer-modified polypropylene composite for vehicles according to claim 1, wherein: the talcum powder is 1250-10000 mesh talcum powder material.
3. The organosilicon-based amphiphilic polymer-modified polypropylene composite for vehicles according to claim 1, wherein: the elastomer is one or a mixture of several of ethylene-propylene copolymer, ethylene-hexene copolymer, ethylene-butene copolymer and ethylene-octene copolymer, and the density is 0.80-1.0 g/cm 3 。
4. The organosilicon-based amphiphilic polymer-modified polypropylene composite for vehicles according to claim 1, wherein: the relative molecular weight of the monomer end vinyl polydimethylsiloxane of the organosilicon-based amphiphilic polymer is 2500Da, and the relative molecular weight of the polyethylene glycol methacrylate is 500Da.
5. The organosilicon-based amphiphilic polymer-modified polypropylene composite for vehicles according to claim 1, wherein: the antioxidant is one or a mixture of more of antioxidant 1010, antioxidant 168 and antioxidant DSTP.
6. The organosilicon-based amphiphilic polymer-modified polypropylene composite for vehicles according to claim 1, wherein: the other auxiliary agents are light stabilizers V703, 5589 and 531, lubricant white oil and vinyl distearamide.
7. The method for preparing the organosilicon-based amphiphilic polymer modified polypropylene composite material for vehicles according to any one of claims 1 to 6, which is characterized by comprising the following steps: the preparation method comprises the following preparation steps:
(1) Adding vinyl-terminated polydimethylsiloxane, polyethylene glycol methacrylate and an initiator into an organic solvent, reacting for 12 hours under the protection of inert gas at 85 ℃ to obtain an organosilicon-based amphiphilic polymer solution, performing rotary evaporation concentration, purifying and recrystallizing to obtain an amphiphilic polymer solid;
(2) According to the weight portions, the organosilicon-based amphiphilic polymer powder, the polypropylene, the talcum powder, the elastomer, the antioxidant and other auxiliary agents are added into a high-speed mixer to be mixed uniformly, and then added into a double-screw extruder to prepare the modified polypropylene composite material through melting, extrusion, cooling and granulating of the double-screw extruder.
8. The method for preparing the organosilicon-based amphiphilic polymer modified polypropylene composite material for vehicles, which is disclosed in claim 7, is characterized in that: the processing temperature of the I-X region of the twin-screw extruder in the step (2) is 150 ℃,185 ℃,205 ℃,205 ℃,210 ℃,220 ℃,225 ℃,
225 ℃,230 ℃,230 ℃; the rotation speed of the main screw is 500-550 r/min, and the temperature of the water tank is 30-60 ℃.
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