CN112480539A - Polypropylene composition and preparation method thereof - Google Patents
Polypropylene composition and preparation method thereof Download PDFInfo
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- CN112480539A CN112480539A CN202011412998.8A CN202011412998A CN112480539A CN 112480539 A CN112480539 A CN 112480539A CN 202011412998 A CN202011412998 A CN 202011412998A CN 112480539 A CN112480539 A CN 112480539A
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- polypropylene
- polypropylene composition
- master batch
- functional master
- heat stabilizer
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- -1 Polypropylene Polymers 0.000 title claims abstract description 61
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 60
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 60
- 239000000203 mixture Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 23
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011324 bead Substances 0.000 claims abstract description 17
- 239000011521 glass Substances 0.000 claims abstract description 17
- 239000003365 glass fiber Substances 0.000 claims abstract description 17
- 239000010445 mica Substances 0.000 claims abstract description 17
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 17
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims description 14
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 12
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 12
- 229960001545 hydrotalcite Drugs 0.000 claims description 12
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 238000005469 granulation Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 2
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 2
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 2
- 150000007970 thio esters Chemical class 0.000 claims description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims 1
- 239000002516 radical scavenger Substances 0.000 claims 1
- 239000000835 fiber Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 2
- 239000003963 antioxidant agent Substances 0.000 description 20
- 230000003078 antioxidant effect Effects 0.000 description 20
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 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 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 description 5
- 239000002131 composite material Substances 0.000 description 5
- 239000005357 flat glass Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000012764 mineral filler Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08J2423/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
-
- 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
Abstract
The invention relates to the technical field of high polymer materials, and particularly relates to a polypropylene composition and a preparation method thereof. The polypropylene composition comprises the following components in percentage by weight: 50-70% of polypropylene resin, 10-30% of glass fiber, 15-30% of functional master batch, 1-5% of compatilizer, 0.2-1% of heat stabilizer and 0.1-0.3% of acid acceptor; the functional master batch comprises the following raw materials in percentage by weight: 30-40% of poly-1-butene, 40-60% of mica, 0-10% of glass beads and 0.5-1% of lubricant; the poly-1-butene in the functional master batch can be matched with the filler to effectively improve the reinforced polypropylene floating fiber, and the addition of the master batch improves the dispersibility of each component, so that the effects of improving the warping and the appearance are more obvious, and the production process has high efficiency.
Description
Technical Field
The invention relates to the technical field of high polymer materials, and particularly relates to a polypropylene composition and a preparation method thereof.
Background
Polypropylene is a nontoxic and odorless high-cleanness polymer, has low density, small water absorption and formability, and is widely applied to plastics. However, the shrinkage is large, about 1 to 2.5%, and the film tends to warp and hardly meets the application requirements.
In the prior art, in order to prevent the warping problem, the strength and the heat distortion temperature of a glass fiber reinforced material are mainly added, but the phenomenon of appearing easily occurs, in order to solve the technical problem, a mineral filler with a fine particle size is mainly added, and the mineral filler, polypropylene, glass fiber and various auxiliary agents are mechanically mixed to obtain a final material.
Disclosure of Invention
Aiming at the problems in the prior art, according to the defects of the polypropylene material in the prior art, the functional master batch is prepared by using the poly-1-butene as the filler and other additives and is applied to the polypropylene composition material, the functional master batch can effectively improve the polypropylene floating fiber, improve the dispersibility of each component, obviously improve the warping and appearance effect, and obtain the polypropylene composition material which has smooth appearance, no deformation, lower linear expansion coefficient and high-temperature creep property.
In order to achieve the above object, the present invention provides a polypropylene composition, which comprises the following components by weight:
50-70% of polypropylene resin, 10-30% of glass fiber, 15-30% of functional master batch, 1-5% of compatilizer, 0.2-1% of heat stabilizer and 0.1-0.3% of acid acceptor;
the functional master batch comprises the following raw materials in percentage by weight: 30-40% of poly-1-butene, 40-60% of mica, 0-10% of glass beads and 0.5-1% of lubricant.
Further, the polypropylene is one or two of polypropylene copolymer or polypropylene homopolymer, and the glass fiber is flat chopped glass fiber.
Further, the compatilizer is one or two of maleic anhydride grafted polypropylene and maleic anhydride grafted POE.
Further, the heat stabilizer is one or more of hindered phenol heat stabilizer, phosphite ester heat stabilizer and thioester heat stabilizer.
Further, the acid absorbent is one or more of calcium stearate, zinc stearate and hydrotalcite.
Further, the melt flow rate of the poly-1-butene in the functional master batch is 0.01-30g/10min, the particle size of the mica is 20-80 meshes, the particle size of the glass beads is 800-2000 meshes, and the lubricant is one or more of ethylene bis stearamide, polyethylene wax, polypropylene wax and oxidized polyethylene wax.
Based on the same inventive concept, the invention provides a preparation method of a polypropylene composition, which comprises the following steps:
s1, mixing the poly-1-butene, the mica, the glass beads and the lubricant, and extruding and granulating by a single-screw mixing roll to obtain functional master batches;
s2, weighing acrylic acid, the functional master batch, the compatilizer, the heat stabilizer and the acid acceptor, adding into a mixer, stirring and mixing for 2-8min to obtain a premix;
and S3, adding the premix into a bidirectional screw extruder, feeding glass fiber in a side feeding manner, and extruding and granulating to obtain the acrylic acid composition.
Further, the temperature of the extrusion granulation process in the step S1 is 150-200 ℃.
Further, the temperature in the extrusion granulation process in the step S3 is 180-230 ℃.
Further, the main machine frequency of the twin-screw extruder in the step S3 is 22-26HZ, the side feeding frequency is 5-10HZ, and the vacuum degree is less than-0.06 MPa.
Has the advantages that:
(1) according to the invention, the poly-1-butene, the mica, the glass beads and other additives are mixed and extruded in proportion to prepare the functional master batch, the poly-1-butene in the master batch is matched with the filler in the master batch, so that the floating fiber of the polypropylene can be effectively improved, the dispersion performance of each component is improved, the warping and appearance improving effects are obvious, and the production process efficiency is high.
(2) The polypropylene composition material is obtained by the mutual matching action of the polypropylene, the functional master batches, the glass fiber and other auxiliary agents, and the injection molded product of the polypropylene composition material has smooth appearance, no deformation, cross-bottom linear expansion coefficient and high-temperature creep property, and is suitable for the production of components around a locomotive engine compartment.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to specific embodiments, but the scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1
The polypropylene composition comprises the following raw materials in percentage by mass: polypropylene resin BX 390055%, flat chopped glass fibers T4355: 20%, functional master batch: 20 percent, 4 percent of maleic anhydride grafted polypropylene and 10100.2 percent of antioxidant. 1680.2% of auxiliary antioxidant, 0.4% of high-temperature antioxidant DLTDP, 0.2% of hydrotalcite, and the functional master batch comprises the following raw materials in percentage by weight: 40% of poly-1-butene, 54% of mica with 60 meshes, 5% of glass beads and 1% of lubricant EBS.
The preparation method comprises the following steps:
and S1, mixing and stirring the poly-1-butene, the glass beads and the lubricant, adding mica powder for melting and banburying to obtain a master batch premix, and extruding, granulating and drying the mixture to obtain the functional master batch.
S2, weighing the following raw materials: polypropylene resin BX3900(55kg), self-made functional master batches (20kg), maleic anhydride grafted polypropylene (4kg), antioxidant 1010(0.2kg), auxiliary antioxidant 168(0.2kg), high-temperature antioxidant DLTDP (0.4kg) and hydrotalcite (0.2kg), and the raw materials are added into a mixer to be stirred and mixed for 4min to obtain a premix;
s3: adding the premix into a co-rotating double-screw extruder for extrusion granulation, controlling the extrusion temperature to be 200 ℃, controlling the host frequency of the co-rotating double-screw extruder to be 23Hz, the feeding frequency to be 7Hz and the vacuum degree to be-0.08 MPa, simultaneously adding 20Kg of flat glass fiber into a side feed, and obtaining the polypropylene composition with the feeding frequency of 2 Hz.
Example 2
The polypropylene composition comprises the following raw materials in percentage by mass: polypropylene resin BX 390050%, flat chopped glass fiber T435525%, functional master batch 20%, maleic anhydride grafted polypropylene 4%, and antioxidant 10100.2%. 1680.2% of auxiliary antioxidant, 0.4% of high-temperature antioxidant DLTDP and 0.2% of hydrotalcite; the functional master batch comprises the following raw materials in percentage by weight: 40 percent of poly-1-butylene, 54 percent of mica with 60 meshes, 5 percent of glass beads and 1 percent of lubricant EBS
The preparation method comprises the following steps:
and S1, mixing and stirring the poly-1-butene, the glass beads and the lubricant, adding mica powder for melting and banburying to obtain a master batch premix, and extruding, granulating and drying the mixture to obtain the functional master batch.
S2, weighing the following raw materials: polypropylene resin BX3900(50kg), self-made functional master batches (20kg), maleic anhydride grafted polypropylene (4kg), antioxidant 1010(0.2kg), auxiliary antioxidant 168(0.2kg), high-temperature antioxidant DLTDP (0.4 kg)%, and hydrotalcite (0.2kg), and the raw materials are added into a mixer to be stirred and mixed for 4min to obtain a premix;
s3, adding the premix into a co-rotating double-screw extruder for extrusion granulation, controlling the extrusion temperature to be 200 ℃, controlling the host frequency of the co-rotating double-screw extruder to be 23Hz, the feeding frequency to be 7Hz and the vacuum degree to be-0.08 MPa, simultaneously adding 25Kg of flat glass fiber into a side feed, and obtaining the polypropylene composition with the feeding frequency of 2.2 Hz.
Example 3
The polypropylene composition comprises the following raw materials in percentage by mass: polypropylene resin BX 390060%, flat chopped glass fiber T4355: 20%, functional master batch: 15 percent, 4 percent of maleic anhydride grafted polypropylene and 10100.2 percent of antioxidant. 1680.2% of auxiliary antioxidant, 0.4% of high-temperature antioxidant DLTDP and 0.2% of hydrotalcite; the functional master batch comprises the following raw materials in percentage by weight: 40 percent of poly-1-butylene, 54 percent of mica with 60 meshes, 5 percent of glass beads and 1 percent of lubricant EBS
The preparation method comprises the following steps:
and S1, mixing and stirring the poly-1-butene, the glass beads and the lubricant, adding mica powder for melting and banburying to obtain a master batch premix, and extruding, granulating and drying the mixture to obtain the functional master batch.
S2, weighing the following raw materials: polypropylene resin BX3900(60kg), self-made functional master batches (15kg), maleic anhydride grafted polypropylene (4kg), antioxidant 1010(0.2kg), auxiliary antioxidant 168(0.2kg), high-temperature antioxidant DLTDP (0.4 kg)%, and hydrotalcite (0.2kg), and the raw materials are added into a mixer to be stirred and mixed for 4min to obtain a premix;
s3, adding the premix into a co-rotating double-screw extruder for extrusion granulation, controlling the extrusion temperature to be 200 ℃, controlling the host frequency of the co-rotating double-screw extruder to be 23Hz, the feeding frequency to be 7Hz and the vacuum degree to be-0.08 MPa, and simultaneously adding 20Kg of flat glass fiber into a side feed, wherein the feeding frequency is 2Hz, thus obtaining the polypropylene composition.
Example 4
The polypropylene composition comprises the following raw materials in percentage by mass: polypropylene resin Z30S 75%, flat chopped glass fiber T435520%, maleic anhydride grafted polypropylene 4% and antioxidant 10100.2%. 1680.2% of auxiliary antioxidant, 0.4% of high-temperature antioxidant DLTDP and 0.2% of hydrotalcite; the functional master batch comprises the following raw materials in percentage by weight: 40 percent of poly-1-butylene, 54 percent of mica with 60 meshes, 5 percent of glass beads and 1 percent of lubricant EBS
The preparation method comprises the following steps:
and S1, mixing and stirring the poly-1-butene, the glass beads and the lubricant, adding mica powder for melting and banburying to obtain a master batch premix, and extruding, granulating and drying the mixture to obtain the functional master batch.
S2, weighing the following raw materials: polypropylene resin Z30S (75kg), maleic anhydride grafted polypropylene (4kg), antioxidant 1010(0.2kg), auxiliary antioxidant 168(0.2kg), high-temperature antioxidant DLTDP (0.4kg) and hydrotalcite (0.2kg), and adding the raw materials into a mixer to be stirred and mixed for 4min to obtain a premix;
s3, adding the premix into a co-rotating double-screw extruder for extrusion granulation, controlling the extrusion temperature to be 200 ℃, controlling the host frequency of the co-rotating double-screw extruder to be 23Hz, the feeding frequency to be 7Hz and the vacuum degree to be-0.08 MPa, and simultaneously adding 20Kg of flat glass fiber into a side feed, wherein the feeding frequency is 2Hz, thus obtaining the polypropylene composition.
Comparative example 1
The polypropylene composition comprises the following raw materials in percentage by mass: polypropylene resin Z30S 75%, flat chopped glass fiber T435520%, maleic anhydride grafted polypropylene 4% and antioxidant 10100.2%. 1680.2% of auxiliary antioxidant, 0.4% of high-temperature antioxidant DLTDP and 0.2% of hydrotalcite.
The preparation method comprises the following steps:
s1, weighing the following raw materials: polypropylene resin Z30S (75kg), maleic anhydride grafted polypropylene (4kg), antioxidant 1010(0.2kg), auxiliary antioxidant 168(0.2kg), high-temperature antioxidant DLTDP (0.4kg) and hydrotalcite (0.2kg), and adding the raw materials into a mixer to be stirred and mixed for 4min to obtain a premix;
s2, adding the premix into a co-rotating double-screw extruder for extrusion granulation, controlling the extrusion temperature to be 200 ℃, controlling the host frequency of the co-rotating double-screw extruder to be 23Hz, the feeding frequency to be 7Hz and the vacuum degree to be-0.08 MPa, and simultaneously adding 20Kg of flat glass fiber into a side feed, wherein the feeding frequency is 2Hz, thus obtaining the polypropylene composition.
And (3) performance testing:
the polypropylene composition materials obtained in examples 1 to 4 and comparative example 1 were subjected to surface and warpage observation by injection molding, and were subjected to mechanical properties, linear expansion coefficient and heat aging properties by injection molding with a standard sample bar. Wherein the heat aging test is carried out according to GB/T7141 (150 ℃, 1000h), the linear expansion coefficient is carried out according to ISO 11359, the bending strength is carried out according to GB/T9341, the tensile strength is carried out according to GB/T1040, the notch impact is carried out according to GB/T1843, and the specific performance test results are shown in Table 1.
TABLE 1 Polypropylene composition injection-molded materials Performance test results
According to the performance results of the polypropylene composition injection products obtained in the above examples and comparative examples, the invention adopts the poly-1-butene, the mica, the glass beads and other additives to cooperate with each other to obtain the functional master batch, and applies the functional master batch to the polypropylene material, so that the injection material has excellent surface finish, low warpage, low linear expansion coefficient and excellent long-term thermal aging resistance. Meanwhile, the method has the advantages of simple process and low cost, and is suitable for batch production to replace part of engineering plastics.
The above-mentioned embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical scope of the present invention, and equivalents and modifications of the technical solutions and concepts of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A polypropylene composition, characterized in that it comprises, in weight percent:
50-70% of polypropylene resin, 10-30% of glass fiber, 15-30% of functional master batch, 1-5% of compatilizer, 0.2-1% of heat stabilizer and 0.1-0.3% of acid acceptor;
the functional master batch comprises the following raw materials in percentage by weight: 30-40% of poly-1-butene, 40-60% of mica, 0-10% of glass beads and 0.5-1% of lubricant.
2. The polypropylene composition according to claim 1, wherein the polypropylene is one or both of a co-polypropylene and a homo-polypropylene, and the glass fiber is a flat chopped glass fiber.
3. The polypropylene composition of claim 1, wherein the compatibilizer is one or both of maleic anhydride grafted polypropylene and maleic anhydride grafted POE.
4. The polypropylene composition according to claim 1, wherein the heat stabilizer is one or more of hindered phenol heat stabilizer, phosphite heat stabilizer and thioester heat stabilizer.
5. The polypropylene composition according to claim 1, wherein the acid scavenger is one or more of calcium stearate, zinc stearate, and hydrotalcite.
6. The polypropylene composition as claimed in claim 1, wherein the melt flow rate of the poly-1-butene in the functional masterbatch is 0.01-30g/10min, the particle size of the mica is 20-80 mesh, the particle size of the glass beads is 800-2000 mesh, and the lubricant is one or more of ethylene bis stearamide, polyethylene wax, polypropylene wax and oxidized polyethylene wax.
7. The preparation method of the polypropylene composition is characterized by comprising the following steps:
s1, mixing the poly-1-butene, the mica, the glass beads and the lubricant, and extruding and granulating by a single-screw mixing roll to obtain functional master batches;
s2, weighing acrylic acid, the functional master batch, the compatilizer, the heat stabilizer and the acid acceptor, adding into a mixer, stirring and mixing for 2-8min to obtain a premix;
and S3, adding the premix into a bidirectional screw extruder, feeding glass fiber in a side feeding manner, and extruding and granulating to obtain the acrylic acid composition.
8. The method for preparing a polypropylene composition according to claim 7, wherein the temperature of the extrusion granulation process in the step S1 is 150-200 ℃.
9. The method for preparing a polypropylene composition according to claim 7, wherein the temperature during the extrusion granulation in the S3 step is 180-230 ℃.
10. The method for preparing polypropylene composition according to claim 7, wherein the main machine frequency of the twin-screw extruder in the step S3 is 22 to 26HZ, the side feeding frequency is 5 to 10HZ, and the vacuum degree is less than-0.06 MPa.
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Application publication date: 20210312 |