CN111978640A - Graphene modified polypropylene composite material for bumper and preparation method thereof - Google Patents
Graphene modified polypropylene composite material for bumper and preparation method thereof Download PDFInfo
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- CN111978640A CN111978640A CN201910985943.7A CN201910985943A CN111978640A CN 111978640 A CN111978640 A CN 111978640A CN 201910985943 A CN201910985943 A CN 201910985943A CN 111978640 A CN111978640 A CN 111978640A
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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
- C08L23/14—Copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
Abstract
The invention discloses a graphene modified polypropylene composite material for bumpers and a preparation method thereof. The graphene modified polypropylene composite material for the automobile bumper consists of the following raw materials in percentage by mass: 54-76% of polypropylene; 18-28% of an inorganic filler; 0.02-0.15% of graphene; 5-15% of a toughening agent; 0.2-1.5% of a coupling agent; 0.3-0.9% of antioxidant; 0.2 to 1 percent of nucleating agent. The graphene modified polypropylene composite material for the automobile bumper has the advantages that after the graphene is used for modifying the polypropylene composite material for the automobile bumper, the tensile strength, the elongation at break and the flexural modulus of the material are obviously improved, the thin-wall requirement of the bumper is further met, the quality of the whole automobile is reduced, the light weight effect is achieved, the preparation process is simple, the cost is low, and the large-scale industrial production is easy to carry out.
Description
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to a graphene modified polypropylene composite material for a bumper and a preparation method thereof.
Background
The polypropylene has the outstanding advantages of excellent mechanics, heat resistance, light weight, chemical solvent resistance, low water absorption, low price and the like, is widely applied to a plurality of fields of automobiles, household appliances, food, medical treatment, building pipes and the like, and has become an important way for energy conservation and emission reduction of automobiles along with further improvement of national requirements for energy conservation and emission reduction and high-speed development of the automobile industry in China, so that the light weight of the automobiles becomes a main trend for automobile development, and the thin-walled material is one of important directions for the light weight development of the automobiles. As a part having the largest surface area of an automobile exterior, thinning of a bumper has become a preferred weight reduction scheme for various automobile manufacturers.
The problems faced in thinning bumpers are mainly: the mechanical property, particularly the rigidity, of the thin-walled material cannot be reduced, and the material is required to have higher toughness so as to achieve good rigidity-toughness balance; and the flowing space of the thinned material is reduced, the flowing resistance is increased, so that the material is required to have higher fluidity and is limited by the defects of the material, the rigidity of the PP material is not too high while the PP material meets high fluidity and high toughness, the mechanical property of the material is reduced after thinning, and the excellent characteristics of high strength, high modulus and the like of the graphene can exactly make up the defects of the PP property.
Disclosure of Invention
The invention overcomes the defects in the prior art, uses graphene to modify polypropylene for bumpers, obviously improves the tensile strength, elongation at break and flexural modulus of materials, further meets the thin-walled requirements of bumpers, can achieve more ideal rigidity-toughness balance compared with the traditional polypropylene, has simple preparation process and lower cost, and is easy to carry out large-scale industrial production, and the technical scheme adopted by the invention is as follows:
the detailed formula of the raw materials comprises the following components in percentage by mass:
54-76% of polypropylene copolymer
18 to 28 percent of inorganic filler
0.02-0.15% of graphene
5 to 15 percent of toughening agent
0.2 to 1.5 percent of coupling agent
0.3 to 0.9 percent of antioxidant
0.2 to 1 percent of nucleating agent
1. The co-polypropylene consists of at least one co-polypropylene. The melt index of the copolymerized polypropylene is 20-100g/10min (230 ℃, 2.16 Kg), 2, the filler is at least one of talcum powder master batch, wollastonite master batch, mica powder and crystal whisker, 3, the graphene is at least one of single-layer graphene powder, graphene oxide and carboxylated graphene, 4, the toughening agent is composed of at least one of ethylene-octene copolymer (POE), SEBS and EPDM, 5, the coupling agent is at least one of silane coupling agent, maleic anhydride grafting coupling agent and EVA, 6, the antioxidant is composed of hindered phenol antioxidant and phosphite antioxidant by compounding according to the proportion of 1:2, 7, the nucleating agent is composed of at least one of organic phosphate nucleating agent and sorbitol nucleating agent, 8, the preparation process is: adding polypropylene, graphene and a coupling agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, performing melt mixing extrusion, bracing, water cooling and granulating to obtain graphene master batches, and processing at the temperature of 180-220 ℃; the polypropylene composite material is prepared by adding the co-polypropylene, the toughening agent, the graphene master batch, the coupling agent, the antioxidant and the nucleating agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, adding the inorganic filler into the mixture from a side feed, performing melt mixing extrusion, bracing, water cooling and grain cutting, and obtaining the polypropylene composite material with remarkably improved tensile strength, elongation at break and flexural modulus, wherein the processing temperature is 180-200 ℃, and the processing temperature is 8, and the beneficial effects of the invention are that:
(1) The prepared graphene-modified polypropylene material for the automobile bumper has the advantages that on the basis of keeping good flowing property, excellent impact resistance, good buckling deformation resistance and low shrinkage rate of the polypropylene material for the automobile bumper, the tensile strength, the elongation at break and the bending modulus are remarkably improved, the rigidity and the toughness are more balanced, and (2) the preparation process is simple, the cost is low, and large-scale industrial production is easy to carry out.
Detailed Description
The graphene modified polypropylene material for the bumper comprises the following components in percentage by mass:
54-76% of polypropylene copolymer
18 to 28 percent of inorganic filler
0.02-0.15% of graphene
5 to 15 percent of toughening agent
0.2 to 1.5 percent of coupling agent
0.3 to 0.9 percent of antioxidant
0.2 to 1 percent of nucleating agent
1. The polypropylene copolymer consists of at least one polypropylene copolymer. The melt index of the copolymerized polypropylene is 20-100g/10min (230 ℃, 2.16 Kg), 2, the filler is at least one of talcum powder master batch, wollastonite master batch, mica powder and crystal whisker, 3, the graphene is at least one of single-layer graphene powder, graphene oxide and carboxylated graphene, 3, the toughening agent is composed of at least one of ethylene-octene copolymer (POE), SEBS and EPDM, 4, the coupling agent is at least one of silane coupling agent, maleic anhydride grafting coupling agent and EVA, 5, the antioxidant is composed of hindered phenol antioxidant and phosphite antioxidant by compounding according to the proportion of 1:2, 6, the lubricant is one or more of polyethylene wax, polypropylene wax, calcium stearate, EBS and TAF, 7, the nucleating agent is composed of organic phosphate nucleating agent and sorbitol, 8. the preparation process comprises the following steps: adding polypropylene, graphene and a coupling agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, performing melt mixing extrusion, bracing, water cooling and granulating to obtain graphene master batches, and processing at the temperature of 180-220 ℃; adding the co-polypropylene, the toughening agent, the graphene master batch, the coupling agent, the antioxidant and the nucleating agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, adding the inorganic filler into the mixture from a side feed, performing melt mixing extrusion, bracing, water cooling and granulating to obtain the polypropylene composite material with remarkably improved tensile strength, elongation at break and flexural modulus, wherein the processing temperature is 180-200 ℃.
The present invention will be further described with reference to specific examples.
The formulation compositions of the examples and comparative examples are shown in Table 1
TABLE 1 formulation composition (in mass%) of examples and comparative examples
| Raw materials | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Polypropylene copolymer | 56 | 64.98 | 72.22 | 56.1 | 65 | 73 |
| Toughening agent | 13 | 12 | 8 | 13 | 12 | 8 |
| Inorganic filler | 28 | 22 | 18 | 28 | 22 | 18 |
| Graphene | 0.1 | 0.02 | 0.08 | |||
| Nucleating agent | 1 | 0.2 | 0.4 | 1 | 0.2 | 0.4 |
| Coupling agent | 1 | 0.5 | 0.8 | 1 | 0.5 | 0.8 |
| Antioxidant agent | 0.9 | 0.3 | 0.5 | 0.9 | 0.3 | 0.5 |
The graphene used in table 1 is single-layer graphene powder, the coupling agent is a silane coupling agent, the talcum powder masterbatch synergist with 5 μm inorganic filler is a copolymer POE8411 of ethylene-octene, and the ratio of the antioxidant used is 1:2 between 1010 and 168.
Adding polypropylene, graphene and a coupling agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, performing melt mixing extrusion, bracing, water cooling and granulating to obtain graphene master batches, and processing at the temperature of 180-220 ℃; adding the co-polypropylene, the toughening agent, the graphene master batch, the coupling agent, the antioxidant and the nucleating agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, adding the inorganic filler into the mixture from a side feed, performing melt mixing extrusion, bracing, water cooling and granulating to obtain the polypropylene composite material with remarkably improved tensile strength, elongation at break and flexural modulus, wherein the processing temperature is 180-200 ℃.
The composite materials obtained after processing were tested by the test standards shown in table two, and table 3 shows the test results of the corresponding examples and comparative examples.
| Detecting items | Unit of | Test standard |
| Tensile strength | Mpa | ISO527-2 |
| Elongation at break | % | ISO527-2 |
| Bending strength | Mpa | ISO 178 |
| Flexural modulus | Mpa | ISO 178 |
| Fuse finger | g/10min | ISO 1133 |
| Notched impact strength of cantilever beam | Kj/m2 | ISO 180 |
| Detecting items | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Tensile strength | 25.7 | 26.8 | 29.3 | 21.5 | 22.8 | 25.6 |
| Elongation at break | 56 | 62 | 69 | 35 | 41 | 45 |
| Bending strength | 38.5 | 35.6 | 30.3 | 31.3 | 30.5 | 28.8 |
| Flexural modulus | 2315 | 2012 | 1784 | 2122 | 1866 | 1520 |
| Fuse finger | 27.5 | 36.6 | 41.9 | 28.3 | 35.8 | 42.5 |
| Notched impact strength of cantilever beam | 40.5 | 41.7 | 30.1 | 41.3 | 42 | 30.8 |
As can be seen from table 3, the results of the examples and the comparative examples show that the tensile strength, the elongation at break, the bending strength, and the bending modulus of the material are significantly improved after the graphene is added for modification, and a better rigidity and toughness balance is achieved by reasonably matching the proportion of the toughening agent and the filler.
It should be understood by those skilled in the art that various changes and modifications can be made to the above embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention are within the scope of the present invention.
Claims (9)
1. The utility model provides a graphite alkene modified polypropylene composite material for bumper, this graphite alkene modified polypropylene composite material for car bumper which characterized in that: the material is composed of the following raw materials by mass percent:
54-76% of polypropylene copolymer
18 to 28 percent of inorganic filler
0.02-0.15% of graphene
5 to 15 percent of toughening agent
0.2 to 1.5 percent of coupling agent
0.3 to 0.9 percent of antioxidant
0.2 to 1 percent of nucleating agent.
2. The graphene-modified polypropylene composite material for bumpers according to claim 1, wherein: the polypropylene is composed of at least one copolymerized polypropylene, and the melt index of the polypropylene is 20-100g/10min (230 ℃, 2.16 Kg).
3. The graphene-modified polypropylene composite material for bumpers according to claim 1, wherein: the filler is at least one of talcum powder master batch, wollastonite master batch, mica powder and crystal whisker.
4. The graphene-modified polypropylene composite material for bumpers according to claim 1, wherein: the graphene is at least one of single-layer graphene powder, graphene oxide and carboxylated graphene.
5. The graphene-modified polypropylene composite material for bumpers according to claim 1, wherein: the toughening agent is composed of at least one of ethylene-octene copolymer (POE), SEBS and EPDM.
6. The graphene-modified polypropylene composite material for bumpers according to claim 1, wherein: the coupling agent is at least one of silane coupling agent, maleic anhydride grafting coupling agent and EVA.
7. The graphene-modified polypropylene composite material for bumpers according to claim 1, wherein: the antioxidant is prepared by compounding hindered phenol antioxidant and phosphite antioxidant according to the proportion of 1: 2.
8. The graphene-modified polypropylene composite material for bumpers according to claim 1, wherein: the nucleating agent is composed of at least one of organic phosphate nucleating agent and sorbitol nucleating agent.
9. The graphene-modified polypropylene composite material for bumpers according to any one of claims 1 to 7, wherein: the preparation method comprises the following preparation processes: adding polypropylene, graphene and a coupling agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, performing melt mixing extrusion, bracing, water cooling and granulating to obtain graphene master batches, and processing at the temperature of 180-220 ℃; adding the co-polypropylene, the toughening agent, the graphene master batch, the coupling agent, the antioxidant and the nucleating agent into a high-speed stirrer in proportion, uniformly mixing, adding the mixture into a double-screw extruder from a main feed, adding the inorganic filler into the mixture from a side feed, performing melt mixing extrusion, bracing, water cooling and granulating to obtain the polypropylene composite material with remarkably improved tensile strength, elongation at break and flexural modulus, wherein the processing temperature is 180-200 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910985943.7A CN111978640A (en) | 2019-10-17 | 2019-10-17 | Graphene modified polypropylene composite material for bumper and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321948A (en) * | 2020-11-25 | 2021-02-05 | 江苏金发科技新材料有限公司 | Silica aerogel-polypropylene light heat-insulating material and preparation method thereof |
| CN113372648A (en) * | 2021-05-21 | 2021-09-10 | 大河宝利材料科技(苏州)有限公司 | Polypropylene and graphene conductive composite material |
| CN113388195A (en) * | 2021-05-24 | 2021-09-14 | 慈溪市龙山汽配有限公司 | Automobile bumper and preparation method thereof |
| CN114213759A (en) * | 2022-01-04 | 2022-03-22 | 深圳中塑化工高性能材料有限公司 | Preparation method and application of polyphosphate grafted graphene flame-retardant modified polypropylene |
| CN114874542A (en) * | 2022-04-29 | 2022-08-09 | 海信空调有限公司 | Halogen-free flame-retardant polypropylene material, preparation method thereof, electric control box and air conditioner |
| US11591457B1 (en) * | 2022-03-30 | 2023-02-28 | Lyten, Inc. | Composite material including three-dimensional (3D) graphene and maleated copolymers |
| US11674031B1 (en) | 2022-03-30 | 2023-06-13 | Lyten, Inc. | Container formed of a composite material including three-dimensional (3D) graphene |
| US11813774B2 (en) | 2022-03-30 | 2023-11-14 | Lyten, Inc. | Method of producing a composite material including three-dimensional (3D) graphene |
-
2019
- 2019-10-17 CN CN201910985943.7A patent/CN111978640A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321948A (en) * | 2020-11-25 | 2021-02-05 | 江苏金发科技新材料有限公司 | Silica aerogel-polypropylene light heat-insulating material and preparation method thereof |
| CN113372648A (en) * | 2021-05-21 | 2021-09-10 | 大河宝利材料科技(苏州)有限公司 | Polypropylene and graphene conductive composite material |
| CN113388195A (en) * | 2021-05-24 | 2021-09-14 | 慈溪市龙山汽配有限公司 | Automobile bumper and preparation method thereof |
| CN114213759A (en) * | 2022-01-04 | 2022-03-22 | 深圳中塑化工高性能材料有限公司 | Preparation method and application of polyphosphate grafted graphene flame-retardant modified polypropylene |
| CN114213759B (en) * | 2022-01-04 | 2023-11-07 | 深圳中塑化工高性能材料有限公司 | Preparation method and application of polyphosphonate grafted graphene flame-retardant modified polypropylene |
| US11591457B1 (en) * | 2022-03-30 | 2023-02-28 | Lyten, Inc. | Composite material including three-dimensional (3D) graphene and maleated copolymers |
| US11674031B1 (en) | 2022-03-30 | 2023-06-13 | Lyten, Inc. | Container formed of a composite material including three-dimensional (3D) graphene |
| US11813774B2 (en) | 2022-03-30 | 2023-11-14 | Lyten, Inc. | Method of producing a composite material including three-dimensional (3D) graphene |
| CN114874542A (en) * | 2022-04-29 | 2022-08-09 | 海信空调有限公司 | Halogen-free flame-retardant polypropylene material, preparation method thereof, electric control box and air conditioner |
| CN114874542B (en) * | 2022-04-29 | 2023-08-08 | 海信空调有限公司 | Halogen-free flame-retardant polypropylene material, preparation method thereof, electric control box and air conditioner |
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