CN114230909A - Wear-resistant creep-resistant polypropylene composite material and preparation method thereof - Google Patents
Wear-resistant creep-resistant polypropylene composite material and preparation method thereof Download PDFInfo
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 145
- -1 polypropylene Polymers 0.000 title claims abstract description 124
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 119
- 239000002131 composite material Substances 0.000 title claims abstract description 79
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910000077 silane Inorganic materials 0.000 claims abstract description 32
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 18
- 125000003277 amino group Chemical group 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 239000000155 melt Substances 0.000 claims abstract description 6
- 238000005299 abrasion Methods 0.000 claims description 16
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 8
- 150000008301 phosphite esters Chemical class 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 11
- 239000004698 Polyethylene Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 238000013329 compounding Methods 0.000 description 7
- 229920000573 polyethylene Polymers 0.000 description 7
- 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 6
- 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 6
- 230000009471 action Effects 0.000 description 6
- 229910002808 Si–O–Si Inorganic materials 0.000 description 4
- 238000006482 condensation reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- GZDFHIJNHHMENY-UHFFFAOYSA-N Dimethyl dicarbonate Chemical compound COC(=O)OC(=O)OC GZDFHIJNHHMENY-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 235000010300 dimethyl dicarbonate Nutrition 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Processes Of Treating Macromolecular Substances (AREA)
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Abstract
The invention relates to a wear-resistant creep-resistant polypropylene composite material and a preparation method thereof, wherein the wear-resistant creep-resistant polypropylene composite material comprises, by weight, 100 parts of PP resin, 30-60 parts of silane grafted polypropylene (the melt index under the test conditions of 230 ℃ and 2.16kg is 10-20 g/10min), 15-40 parts of PA6 (the content of terminal amino groups is 45-65 mmol/kg), 3-8 parts of a compatilizer, 0.2-0.5 part of a dispersant, and 0.2-0.5 part of an antioxidant: the preparation method comprises the following steps: the preparation method comprises the steps of uniformly mixing PP resin, silane grafted polypropylene, PA6, a compatilizer, a dispersing agent and an antioxidant in a high-speed mixer at the speed of 220-460 r/min to form a premix, and then granulating the formed premix in a double-screw extruder to obtain the wear-resistant creep-resistant polypropylene composite material. According to the invention, the PA6 with high-end amino content is used for absorbing water to hydrolyze the silane grafted polypropylene in the polypropylene composite material to generate a crosslinking structure, so that the crosslinking reaction inside and outside the composite material is relatively uniform, the wear-resisting and creep-resisting performance improving effects are relatively good, and the composite material can be widely applied to the fields of automobiles, household appliances and homes.
Description
Technical Field
The invention belongs to the technical field of polypropylene materials, and relates to a wear-resistant creep-resistant polypropylene composite material and a preparation method thereof.
Background
The polypropylene material is a common material in the fields of automobiles, household appliances, LEDs and the like due to the characteristics of low density, excellent chemical resistance, good molding processability, certain price advantage and the like, but the polypropylene is a non-polar material and lacks the influence of polar groups and hydrogen bond action, so that the polypropylene has the influence of poor wear resistance, high wear resistance and poor creep resistance, and is difficult to meet the application occasions with no obvious change in required performance and size under the conditions of long-term stress and temperature change.
At present, the research on creep-resistant and wear-resistant polypropylene has been reported, and patent application CN 112500642 a discloses a polypropylene composite material with high heat resistance, creep resistance and high dimensional stability for household appliance bases and a preparation method thereof, wherein a cyclic aliphatic amine chain extender DMDC is used for carrying out a body type crosslinking reaction on an ethylene monomer in a co-polypropylene, and inorganic minerals are added to improve the heat resistance of the polypropylene, so as to obtain the polypropylene composite material with creep resistance, high heat resistance and high dimensional temperature. Patent application CN 106188862 a discloses a polypropylene composite material with excellent creep resistance, which uses maleic-1 to increase the physical entanglement points of polypropylene to improve the creep resistance of the material, and because the physical entanglement points can cause entanglement point separation during long-term use, the polypropylene composite material has certain limitations. Patent application CN 108929485A discloses a creep-resistant polypropylene composite material, which is prepared by adding dicumyl peroxide DCP to chemically crosslink partial molecular chains of polypropylene, but the DCP is added to degrade and crosslink polypropylene at first, and the degradation and crosslinking are carried out simultaneously, and the branch chains of the polypropylene material are fewer, so that the final crosslinking degree and the creep-resistant effect of the product are influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a wear-resistant creep-resistant polypropylene composite material and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the wear-resistant creep-resistant polypropylene composite material comprises the following components in parts by weight:
the melt index of the silane grafted polypropylene under the test conditions of 230 ℃ and 2.16kg is 10-20 g/10 min; too low melt index can cause too poor processability of the crosslinked polypropylene, too high melt index can cause too high reaction speed of the hydrolyzed silane grafted polypropylene, and the subsequent uncontrollable crosslinking can be generated; the silane grafted polypropylene is preferably XPM800N of Mitsubishi chemical, and the melt index of XPM800N is 16g/10 min;
the content of the terminal amino group of the PA6 is 45-65 mmol/kg; the amino-terminated content is too low, the water absorption rate is relatively slow, so that the speed of forming silanol by hydrolyzing silane is relatively slow, the speed and the time of forming a-Si-O-Si-type cross-linking structure after condensation reaction among silanol molecules are inconsistent, and the wear resistance and the creep resistance are influenced; the content of the terminal amino group is too high, the molecular weight of PA6 is relatively small, the molecular chain is relatively short, and the strength and the modulus of the PA6 are relatively low, so that the mechanical property of the prepared composite material is reduced, and the wear resistance is also reduced;
the creep of the wear-resistant and creep-resistant polypropylene composite material is less than or equal to 8 percent measured according to the GB6059-85 standard, and the wear loss of the wear-resistant and creep-resistant polypropylene composite material is less than 30mg measured according to the GB/T3960-2016 standard.
As a preferred technical scheme:
according to the wear-resistant creep-resistant polypropylene composite material, the melt index of the PP resin at 230 ℃ under the test condition of 2.16kg is 5-80 g/10 min.
The wear-resistant and creep-resistant polypropylene composite material is characterized in that the PP resin is homo-polypropylene, co-polypropylene or a mixture of the homo-polypropylene and the co-polypropylene.
The wear-resistant and creep-resistant polypropylene composite material is characterized in that the compatilizer is PP-g-MAH (polypropylene grafted maleic anhydride).
According to the wear-resistant creep-resistant polypropylene composite material, the grafting ratio of maleic anhydride in the PP-g-MAH is more than 1.2%, the grafting ratio is higher, the compatibility of polypropylene and PA6 is better, and the wear resistance and creep resistance are improved.
The wear-resistant creep-resistant polypropylene composite material is characterized in that the dispersing agent is metallocene-catalyzed low-molecular-weight PE (polyethylene) wax, and the weight average molecular weight of the low-molecular-weight PE wax is 1000-3000.
The anti-wear and creep-resistant polypropylene composite material is prepared by compounding hindered phenol antioxidants and phosphite esters according to the mass ratio of 1: 1.
The invention also provides a wear-resistant creep-resistant polypropylene composite material prepared by the method, which comprises the following steps:
(1) uniformly mixing PP resin, silane grafted polypropylene, PA6, a compatilizer, a dispersant and an antioxidant in a high-speed mixer at the speed of 220-460 r/min to form a premix;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder to prepare the wear-resistant creep-resistant polypropylene composite material.
As a preferred technical scheme:
according to the method, the mixing time in the step (1) is 7-10 min.
According to the method, the processing temperature of the double-screw extruder in the step (2) is 190-220 ℃.
The principle of the invention is as follows:
the composite material contains silane grafted polypropylene, siloxane groups in the silane grafted polypropylene are hydrolyzed under the action of water to form silanol, and silanol molecules are condensed to form Si-O-Si bonds, so that polypropylene molecular chains are connected together through the Si-O-Si bonds to form a structure similar to a cross-linked network. Usually, silane grafted polypropylene can be crosslinked only when hot water or high humidity is needed, the time lasts for a long time and the internal crosslinking speed is relatively slow, the invention absorbs moisture in the air by adding PA6 with high-end amino content, so that the composite material containing the silane grafted polypropylene is gradually crosslinked inside and outside the material in the standing process, the crosslinking degree is relatively uniform (the composite material does not contain water molecules inside, but PA6 contains polar amido bonds, so the water molecules are absorbed inside the composite material, under the action of the water molecules, silicon oxygen bonds in the silane grafted polypropylene inside the composite material are hydrolyzed into silanol under the action of the water molecules, and condensation reaction occurs among silanol molecules to form Si-O-Si bonds, thereby the connection among polypropylene molecular chains is caused, and a structure similar to a crosslinked network is formed), the polypropylene composite material prepared by crosslinking has better wear-resisting and creep-resisting effects, and the addition of the PA6 is also beneficial to improving the wear-resisting and creep-resisting properties of the polypropylene, so that the prepared polypropylene composite material has better wear-resisting and creep-resisting properties.
Has the advantages that:
(1) the preparation method of the wear-resistant creep-resistant polypropylene composite material is simple and easy to implement, low in cost and high in popularization value;
(2) according to the preparation method of the wear-resistant creep-resistant polypropylene composite material, the PA6 with high-end amino group content is used for absorbing water to hydrolyze silane grafted polypropylene in the polypropylene composite material to generate a cross-linking structure, so that the advantages that the cross-linking reaction inside and outside the composite material is uniform, and the wear-resistant creep-resistant performance is improved.
(3) The wear-resistant creep-resistant polypropylene composite material has good wear resistance and creep resistance, and can be widely applied to the fields of automobiles, household appliances and home furnishing.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
In the invention, the creep resistance is characterized by creep, the creep is tested according to the GB6059-85 standard, wherein the size of a sample is 120 multiplied by 10 multiplied by 4mm, the testing temperature is 23 ℃, the stress is 23MPa, and the strain (%) of the outermost layer of a sample strip after 48 hours is recorded;
according to the GB/T3960-2016 standard, the composition is subjected to injection molding to prepare a sample of 3cm multiplied by 2cm multiplied by 0.5cm, and a multifunctional friction and wear tester is used for carrying out wear resistance test; the dual material is 45# steel, the rotating speed is 200r/min, the load is 20N, the experimental time is 2h, and the abrasion loss is measured according to a weighing method.
Example 1
A preparation method of a wear-resistant creep-resistant polypropylene composite material comprises the following specific steps:
(1) mixing 100 parts of PP resin, 30 parts of silane grafted polypropylene, 15 parts of PA6, 3 parts of compatilizer, 0.2 part of dispersant and 0.2 part of antioxidant in a high-speed mixer at the speed of 220 r/min for 7min to form premix;
wherein the commodity brand of the PP resin is PP S2040; the silane grafted polypropylene is XPM800N of Mitsubishi chemical; the commercial designation of PA6 is PA 6M 1013B; the compatilizer is PP-g-MAH, and the commodity brand is CMG-5001; the dispersant is metallocene catalyzed polyethylene wax, and the product number is 48070 BT; the antioxidant is prepared by compounding hindered phenol antioxidant (antioxidant 1010) and phosphite ester (antioxidant 168) according to the mass ratio of 1: 1;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder with the processing temperature of 200 ℃ to prepare the wear-resistant creep-resistant polypropylene composite material.
The creep of the finally prepared wear-resistant creep-resistant polypropylene composite material is 7.4 percent, and the abrasion loss is 27.5 mg.
Comparative example 1
A polypropylene composite was prepared substantially as in example 1, except that the silane-grafted polypropylene was not included in the raw materials in step (1), and the final polypropylene composite had a creep of 14.7% and an abrasion loss of 36.3 mg.
Comparative example 2
A polypropylene composite was prepared substantially as in example 1, except that PA6 was not included in the starting materials in step (1), and the final polypropylene composite had a creep of 14.5% and an abrasion loss of 47.5 mg.
As can be seen from example 1 and comparative examples 1 and 2, the addition of the silane grafted polypropylene and the high-end amino PA6 can reduce the creep property and the abrasion loss of the material, because the silicon-oxygen bond in the silane grafted polypropylene in the material is hydrolyzed into silanol under the action of water molecules, and condensation reaction occurs between silanol molecules to form Si-O-Si bond, thereby causing the connection between polypropylene molecular chains to form a structure similar to a cross-linked network, and the formation of the cross-linked network can reduce the creep and the abrasion loss of the polypropylene material under the action of external force. In comparative example 1, no silane grafted polypropylene is added, and a crosslinked network structure cannot be formed even if high-end amino PA6 is added, but the PA6 slightly improves the wear resistance of the composite material due to high strength, and has little influence on creep property. Comparative example 2 did not incorporate high-end amino PA6, and therefore the composite did not have sufficient moisture to hydrolyze the siloxane bonds to form silanol, and failed to form a crosslinked network-like structure, thereby affecting creep and abrasion resistance.
Comparative example 3
A polypropylene composite material was prepared substantially as in example 1, except that PA6 in step (1) was designated as YH3400, and the final polypropylene composite material had a creep of 9.6% and a wear loss of 33.5 mg.
Comparative example 4
A polypropylene composite material was prepared substantially as in example 1 except that in step (1), PA6 was designated as J2400, and the final polypropylene composite material had a creep of 11.2% and a wear loss of 38.1 mg.
The content of the terminal amino group of PA6 in comparative example 3 and comparative example 4 is less than 45mmol/kg and more than 65mmol/kg respectively, and it can be seen from comparative example 3 and comparative example 4 that the content of the terminal amino group is too low, the water absorption rate is relatively slow, so that the speed of forming silanol by hydrolyzing silane is relatively slow, the speed and time of forming a-Si-O-Si-type cross-linked structure after silanol intermolecular condensation reaction are inconsistent, and the wear resistance and creep resistance are affected; the content of the terminal amino groups is too high, the molecular weight of PA6 is relatively small, the molecular chain is relatively short, and the strength and the modulus of the PA6 are relatively low, so that the mechanical property of the prepared composite material is reduced, and the wear resistance is also reduced.
Example 2
A preparation method of a wear-resistant creep-resistant polypropylene composite material comprises the following specific steps:
(1) mixing 100 parts of PP resin, 30 parts of silane grafted polypropylene, 15 parts of PA6, 3 parts of compatilizer, 0.2 part of dispersant and 0.2 part of antioxidant in a high-speed mixer at the speed of 300 r/min for 8min to form premix;
wherein the commodity brand of the PP resin is PP S2040; the silane grafted polypropylene is XPM800N of Mitsubishi chemical; the commercial designation of PA6 is PA 6M 1013B; the compatilizer is PP-g-MAH, and the commodity brand is CMG-5001; the dispersant is metallocene catalyzed polyethylene wax, and the product number is 48070 BT; the antioxidant is prepared by compounding hindered phenol antioxidant (antioxidant 1010) and phosphite ester (antioxidant 168) according to the mass ratio of 1: 1;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder with the processing temperature of 190 ℃ to prepare the wear-resistant creep-resistant polypropylene composite material.
The creep of the finally prepared wear-resistant creep-resistant polypropylene composite material is 7.5 percent, and the abrasion loss is 28.1 mg.
Example 3
A preparation method of a wear-resistant creep-resistant polypropylene composite material comprises the following specific steps:
(1) mixing 100 parts of PP resin, 35 parts of silane grafted polypropylene, 20 parts of PA6, 5 parts of compatilizer, 0.3 part of dispersant and 0.3 part of antioxidant for 8min in a high-speed mixer at the speed of 300 r/min to form premix;
wherein the commodity brand of the PP resin is PP K7926; the silane grafted polypropylene is XPM800N of Mitsubishi chemical; the commercial designation of PA6 is PA 6M 2400; the compatilizer is PP-g-MAH, and the commodity brand is CMG-5001; the dispersant is metallocene catalyzed polyethylene wax, and the product number is 48070 BT; the antioxidant is prepared by compounding hindered phenol antioxidant (antioxidant 1010) and phosphite ester (antioxidant 168) according to the mass ratio of 1: 1;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder with the processing temperature of 210 ℃ to prepare the wear-resistant creep-resistant polypropylene composite material.
The creep of the finally prepared wear-resistant creep-resistant polypropylene composite material is 6.9 percent, and the abrasion loss is 25.4 mg.
Example 4
A preparation method of a wear-resistant creep-resistant polypropylene composite material comprises the following specific steps:
(1) mixing 100 parts of PP resin, 40 parts of silane grafted polypropylene, 25 parts of PA6, 5 parts of compatilizer, 0.3 part of dispersant and 0.4 part of antioxidant in a high-speed mixer at 380 r/min for 7min to form premix;
wherein the commodity brand of the PP resin is PP BX 3800; the silane grafted polypropylene is XPM800N of Mitsubishi chemical; the commercial designation of PA6 is PA 6M 2400; the compatilizer is PP-g-MAH, and the commodity brand is CMG-5001; the dispersant is metallocene catalyzed polyethylene wax, and the product number is 48070 BT; the antioxidant is prepared by compounding hindered phenol antioxidant (antioxidant 1010) and phosphite ester (antioxidant 168) according to the mass ratio of 1: 1;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder with the processing temperature of 210 ℃ to prepare the wear-resistant creep-resistant polypropylene composite material.
The creep of the finally prepared wear-resistant creep-resistant polypropylene composite material is 6.1 percent, and the abrasion loss is 22.7 mg.
Example 5
A preparation method of a wear-resistant creep-resistant polypropylene composite material comprises the following specific steps:
(1) mixing 100 parts of PP resin, 50 parts of silane grafted polypropylene, 30 parts of PA6, 6 parts of compatilizer, 0.4 part of dispersant and 0.5 part of antioxidant in a high-speed mixer at the speed of 440 r/min for 7min to form premix;
wherein the commodity brand of the PP resin is PP 1100; the silane grafted polypropylene is XPM800N of Mitsubishi chemical; the commercial designation of PA6 is PA 6M 2400; the compatilizer is PP-g-MAH, and the commodity brand is CMG-5001; the dispersant is metallocene catalyzed polyethylene wax, and the product number is 48070 BT; the antioxidant is prepared by compounding hindered phenol antioxidant (antioxidant 1010) and phosphite ester (antioxidant 168) according to the mass ratio of 1: 1;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder with the processing temperature of 220 ℃ to prepare the wear-resistant creep-resistant polypropylene composite material.
The creep of the finally prepared wear-resistant creep-resistant polypropylene composite material is 5.7 percent, and the abrasion loss is 17.4 mg.
Example 6
A preparation method of a wear-resistant creep-resistant polypropylene composite material comprises the following specific steps:
(1) mixing 100 parts of PP resin, 60 parts of silane grafted polypropylene, 40 parts of PA6, 8 parts of compatilizer, 0.5 part of dispersant and 0.5 part of antioxidant for 10min in a high-speed mixer at the speed of 460 r/min to form premix;
wherein the commodity brand of the PP resin is PP 1100; the silane grafted polypropylene is XPM800N of Mitsubishi chemical; the commercial designation of PA6 is PA 6M 1013B; the compatilizer is PP-g-MAH, and the commodity brand is CMG-5001; the dispersant is metallocene catalyzed polyethylene wax, and the product number is 48070 BT; the antioxidant is prepared by compounding hindered phenol antioxidant (antioxidant 1010) and phosphite ester (antioxidant 168) according to the mass ratio of 1: 1;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder with the processing temperature of 200 ℃ to prepare the wear-resistant creep-resistant polypropylene composite material.
The creep of the finally prepared wear-resistant creep-resistant polypropylene composite material is 5.2 percent, and the abrasion loss is 16.5 mg.
Claims (10)
1. The wear-resistant creep-resistant polypropylene composite material is characterized by comprising the following components in parts by weight:
the melt index of the silane grafted polypropylene under the test conditions of 230 ℃ and 2.16kg is 10-20 g/10 min;
the content of the terminal amino group of the PA6 is 45-65 mmol/kg;
the creep of the wear-resistant and creep-resistant polypropylene composite material is less than or equal to 8 percent measured according to the GB6059-85 standard, and the wear loss of the wear-resistant and creep-resistant polypropylene composite material is less than 30mg measured according to the GB/T3960-2016 standard.
2. The wear-resistant creep-resistant polypropylene composite material as claimed in claim 1, wherein the PP resin has a melt index of 5-80 g/10min at 230 ℃ under a test condition of 2.16 kg.
3. The abrasion and creep resistant polypropylene composite according to claim 2, wherein the PP resin is homo polypropylene, co polypropylene or a mixture thereof.
4. The abrasion and creep resistant polypropylene composite according to claim 1, wherein the compatibilizer is PP-g-MAH.
5. The abrasion and creep resistant polypropylene composite according to claim 1, wherein the grafting ratio of maleic anhydride in the PP-g-MAH is more than 1.2%.
6. The abrasion-resistant creep-resistant polypropylene composite material according to claim 1, wherein the dispersant is metallocene-catalyzed low molecular weight PE wax, and the weight average molecular weight of the low molecular weight PE wax is 1000 to 3000.
7. The wear-resistant creep-resistant polypropylene composite material as claimed in claim 1, wherein the antioxidant is compounded by hindered phenol antioxidant and phosphite ester according to the mass ratio of 1: 1.
8. The preparation method of the wear-resistant creep-resistant polypropylene composite material as claimed in any one of claims 1 to 7, which comprises the following steps:
(1) uniformly mixing PP resin, silane grafted polypropylene, PA6, a compatilizer, a dispersant and an antioxidant in a high-speed mixer at the speed of 220-460 r/min to form a premix;
(2) and (2) granulating the premix formed in the step (1) in a double-screw extruder to prepare the wear-resistant creep-resistant polypropylene composite material.
9. The method according to claim 8, wherein the mixing time in the step (1) is 7-10 min.
10. The method according to claim 8, wherein the processing temperature of the twin-screw extruder in the step (2) is 190-220 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116041845A (en) * | 2022-12-23 | 2023-05-02 | 上海金发科技发展有限公司 | Polypropylene composite material and preparation method and application thereof |
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